Roof Vents and Attic Ventilation: Problems and Solutions

General Roofing Systems Canada provides roof ventilation repairs to  throughout Canada.  Roof ventilation Repairs are completed in the following cities; Calgary, Red Deer, Edmonton, Fort McMurray, Lloydminster, Saskatoon, Regina, Medicine Hat, Lethbridge, Canmore, Banff, Cranbrook, Kelowna, Vancouver, Whistler, Winnipeg, Toronto and points between. British Columbia. Alberta. Saskatchewan. Manitoba. Ontario

Roof Ventilation Changed for Proper Attic Air Flow (Condensation Problems)

This is the time of year that we receive a number of calls from homeowners regarding  leaking roof problems.

Some of the top reasons for leaking roof problems are:

  1. Chimney flashing is installed incorrectly and is leaking.
Roof Repair Roof Leak
Replacement of Flashing around the Chimney is done correctly using roof membrane (ice and water) and then proper flashing is installed to back and side of chimney
  1. Skylight flashing has leaks due to incorrect installation.
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Skylight Repair and Replacement in Progress. Premium roof underlay membrane is installed around the skylight which keeps it from leaking.


3. Valleys on roof are leaking. Shingles in roof valleys are commonly done wrong.

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Roof Valley being installed correctly with roof underlay. Roof flashing installed on top, and synthetic roof underlay to rest of roof.
  1. Attic condensation that causes moisture in the attic. The attic moisture manifests as “roof leaks” due to poor roof ventilation. Roof ventilation is not adequate at either the ridge of the roof (exhaust) or at the soffit area (intake).
Roof Sheeting Mold, Attic Mold, Condensation II
Attic Ventilation Problems Cause Condensation and Roof Rot, Mold, Energy Loss, and More

 

  1. Improper Installation of Roof Underlayment.
Re-Roofing, Shake to Asphalt, Coloured Metal Drip Edge - Eave Edge
Properly Installed Roof Underlay : The Ice and Water Shield is installed to roof deck at roof eave edge and synthetic premium underlay installed to rest of roof (complete roof area covered and no wood is left to show, roof tar felt is not used as it dries out and cracks and causes leaks)

 

  1. Improper Installation of Roof Vents and Penetrations
Ice and Water Membrane to Back and Sides of Roof Openings, Wall, Step
Above is an example of proper roof vent installation. This method can be used with any penetration at the roof deck. Roof vent has caulking under vent, high quality ice and water underlay is applied to both sides and to the back of vent which will not allow ice build up to enter under shingles to cause any roof leaks.
  1. Improper Installation of Roof Flashing at Wall (where roof meets a wall).

Shake Roofing, Shake Roof Repair Alberta, General Roofing Systems Canada (Alberta)

OLYMPUS DIGITAL CAMERA
The Roof Flashing at wall base on this home was not done correctly (non existent) on this cedar roof resulting in the home-owner experiencing leaks.

 

The home in the photos of this roof repair were experiencing leaks in there skylights. To resolve this issue, we changed the skylight flashing, which brought forth further attic condensation problems. The combination of the two problems resulted in the roof ventilation needing  to be repaired.

The steps to complete this repair are as follows:

Remove roof vents at peak of roof. 

  1. Remove IKO shingles around roof vents to expose roof underlay.
  2. Remove roof underlayment to roof deck (sheathing).
  3. Remove DuroFlo vent to expose roof attic space.
  4. Inspect exposed roof deck for damage due to attic moisture (condensation).
  5. Install backing to opening and fasten roof deck patch to holes.
  6. Install patch cut to fit each hole.
  7. Install new roof underlay.
  8. Install IKO shingles as needed.

Install 2 new Whirlybird turbine roof vents at peak:
1. Remove IKO shingles at location on roof.
2. Remove roof underlay to expose roof deck.
3. Inspect roof boards for condensation.
4. Cut hole in roof deck to install new vents
5. Attach whirley bird vents to roof deck over vent access.
6. Install new underlayment.
7. Install IKO shingles as needed

Roof Repair, Residence has Attic Condensation Problems

Roof Repair - Attic Ventilation - Whirley Birds

Attic Ventilation, Remove Duroflo Vents to Whirley
Attic Ventilation, Remove DuroFlo Vents and change to Whirlybird turbines
Shingle Roof Repair
New IKO Shingles installed
Roof Repair,
IKO Dual Black Shingles installed Over Vent Hole
Roof Repair - Attic Ventilation - Whirley Birds
Whirlybird Installation for Attic ventilation repair
Attic Vents - Whirley Bird
Attic Vents – Whirlybird
Roof Vents - Remove Duroflo Vents
Nearing job Completion

 

About Roof Ventilation:

Correct attic ventilation provides your roof with the correct amount of airflow to prevent moisture buildup. Moisture in the attic space causes roofing to rot and release condensation. Proper ventilation will help energy costs by regulating the temperature of your home.

Attic ventilation is important to reduce the buildup of heat in your attic which can cause ice dams, shingle decay, condensation, higher energy costs and even mould. Additional ventilation is often required in older homes to meet the BC, Alberta, and Saskatchewan Building regulations. This is also required to meet  the shingle manufacturer warranty requirements.

Attic ventilation can be corrected:

The roof repair above shows us adding roof vent turbines (whirley birds) to increase air flow to the attic in this home. You can also install ridge vents or more conventional roof vents.

How to Calculate Proper Attic Ventilation:

There is no such thing as having too much attic ventilation.  Realistically you want your attic to be the same temperature as it is outside in the winter and in the summer you want  to be able to get the warm air out.

The primary focus when  ventilating an attic is to not actually bring down the attic temperature (of course this would be beneficial in summer when your house and attic are hot). The main reason for ventilating the attic is to eliminate the moisture in your attic space that causes roof leaks and a host of other problems such as; ice dams, rot, shingle warranty problems, paint peeling and mould. Improper venting causes your house to sweat and not breath right.

The following is how you would calculate the proper amount of ventilation required for an attic:

  1. Multiply the total square footage of your attic space by 144.
  2. Divide the total above by 2.
  3. Divide total above by by 300.
  4. What is called the “net free” area you now know. The net free square inch area required for intake ventilation (for example at soffit) and the exhaust ventilation (for example the vents at the ridge as in the photos above).
  5. Divide the “net free” area by the ‘”net free'” area the Ventilation Product Manufacturer provides on the box. This will be your calculation for how many roof vents you need to install for correct attic ventilation.

Attic Solution – Keep the Heat Under Control With Proper Attic Ventilation!!!

Until Next Time,

The Team at GRS

CONTACT US:
General Roofing Systems Canada (GRS)
24 Hour Emergency Roof Repair: Call +1.877.497.3528 toll-free.

info@grscanadainc.com

Calgary, Red Deer, Edmonton, Fort McMurray, Lloydminster, Saskatoon, Regina, Medicine Hat, Lethbridge, Canmore, Banff, Cranbrook, Kelowna, Vancouver, Whistler, Winnipeg, Toronto and points between. British Columbia. Alberta. Saskatchewan. Manitoba. Ontario

IKO Cambridge Shake to Shingle Conversion in Fairmont Hot Springs, British Columbia

Taken from our 2011 archives.

General Roofing Systems Canada Provides Shingle Roofing Throughout Canada. Toronto, Calgary, Red Deer, Edmonton, Lloydminster, Saskatoon, Regina, Medicine Hat, Lethbridge, Canmore, Banff, Kelowna, Vancouver, Whistler, and points between.

Below is a report we received from one of our shingle re-roof crews today from Fairmont. 

Specifications:

Shingle to Shake Conversion, IKO Cambridge Dual Black Lifetime Warranty Shingles, High Profile Ridge Cap, Ice & Water to Eaves and Valleys, Roof Edge Coloured Drip Flashing to Eaves and Gable Ends, Coloured Valley installed in roof valleys (Ice & Water to sheathing, then valley metal, then Ice & Water to sides of metal and synthetic underlay run through horizontal to valley), Synthetic Dupont Underlay to roof deck, Ventilation Corrected – vent holes cut and Duroflo Roof Vents installed, Skylight Re-Flashed with Coloured Metal and Ice & Water Underlayment to Skylight Curb.

Field Report, June 21 2011:

The client’s roof was a cedar shake tear-off/conversion about 20 to 25 years old and was already showing major signs of deterioration, most likely because of the area’s humidity. The flashing on the skylight had been improperly installed, causing it to leak on the top and staining the ceiling on the inside. We wrapped it up the curbs with Ice & Water shield and installed new coloured skylight flashing. Since the main house was a vaulted ceiling, the moisture that was coming in would have went right down the drywall and followed it down all the way to the bottom. Also, because of the vaulted ceilings, the insulation was up close to the sheeting and there were no air vents installed. We cut in and installed two air roof vents one two of the roof’s dormers – both of which had less than 100 ft. of air space.

As you can see from the photos below, the finished Cambridge IKO dual-black shingle roof has great architectural style, especially with the high profile shingle cap.

01
Completed re-shingling in Fairmont, BC
02
Shingle Crew Packing Up
03
Yard clean up complete.
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GRS Roof Valley Spec; install ice and water to roof sheathing, then W coloured valley metal, then ice and water to edges of valley metal, then synthetic underlayment (Dupont roof underlay in this instance).
04
Completed Shake to Shingle Re Roof (Side of home)
05
Completed Shake to Shingle (back side of home)
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GRS Shingle Re-Roof Specifications at work, it is impossible for this roof to leak.
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Preparation of valley area – ice and water membrane run through valley area to roof deck both ways prior to vertical ice and water installed, then metal, then Ice & Water to sides of metal.
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Another photo of the preparation of the valley area.
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Skylight Membrane. Premium Ice & Water to skylight curb prior to skylight flashing being installed. Note the order of membrane application. Bottom, then sides, then top of skylight curb.
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Skylight Flashing Specifications at its best.
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Premium Ice & Water 44″ to all eaves and valleys.
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Skylight flashing completed. Coloured flashing. Good match to the IKO Cambridge Dual Black Architectural Shingle.
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High profile ridge cap shingles, colored W valley flashing, coloured Duroflo vents, shingles are not over exposed and good straight lines in installation.
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Coloured Valley Flashing matches IKO Shingles well. Chimney flashed to show black flashing to street view.
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Architectural shingle. IKO Lifetime Warranty Cambridge Shingle.

 

CONTACT US:
General Roofing Systems Canada (GRS)

24 Hour Emergency Roof Repair: Call +1.877.497.3528 toll-free.

info@grscanadainc.com.

British Columbia | Alberta | Saskatchewan | Manitoba | Ontario

Choosing the Right Roof Ventilation

General Roofing Systems Canada installs roof vents throughout Canada. Roof vent service in Toronto, Calgary, Red Deer, Edmonton, Fort McMurray, Lloydminster, Saskatoon, Regina, Medicine Hat, Lethbridge, Canmore, Banff, Cranbrook, Kelowna, Vancouver, Whistler and points between.

Roof ventilation is one of the most misunderstood components of the roofing industry. Unfortunately, we respond to roof leaks all the time that are a result of improper ventilation, and the company that installed the new roof system did not even consider it. Worse yet, many companies install brand new roofing products which will only last a portion of the time it should after their clients pay good money. This is obviously a sore spot for the roofers here at GRS.

“Improper roof ventilation will cause your roof to not perform correctly and will cause ice damming, sheathing rot, mold, condensation, leaks, and will cause your roof membrane or roof shingles to deteriorate prematurely.”

The ratio of roof vent exhausts on a sloped roof is about 250:1. In other words, you need about 1 sq. ft. of roof vent (or exhaust from your roof) for every 250 sq. ft. of roof deck. This should be equal to the roof system intake, which is typically located under your roof soffits.

The main types of vents for your roof and attic are as follows:

  • Standard Roof Vents or Roof Louvers: These are the standard vents that are
    Lomanco Standard Roof Vent
    Lomanco Standard Roof Vent

    typically the ones you see everyday on sloped roofs (if you have ever stopped to notice, we know roof venting is a boring topic). These roof vents are available in a variety of styles and colours.

 

  • Whirlybirds or Turbine Roof Vents: Whirlybird vents, turbo vents, or roof
    Turbine Vent - Duraflo
    Turbine Vent – Duraflo

    turbines, as they are called generically, are the ones you see on sloped roofs that turn in the wind.

  • Powered Roof Vents or Solar-powered Roof Vents: Powered roof vents need to be hooked up by an electrician (as they use power), and solar-powered ones are obviously powered by the sun. A caution to solar buyers – be sure to use a reputable solar vent supplier and an installer of the roof vent that know what they are doing.

One of the suppliers we recommend is Lomanco. The Omni Solar Roof Vent by them is of excellent quality and the vent itself performs as advertised and performs very well. Information on this solar roof vent IIvent system is available here.

  • Ridge Line Vents or Roof Ridge Vents: Ridge venting is one method of roof venting we recommend to our customers often. The ridge vent allows constant, even predictable roof or attic ventilation. In areas in the north such as Edmonton, Fort McMurray, Lloydminster, and Saskatoon, the ridge vent can save your home from leaking due to attic condensation when snow loads will cover over the exhaust of traditional ventilation systems.
Ridge Vent on Shingle Roof
Ridge Vent on Shingle Roof

Ridge venting is more costly as the sheathing at the ridge of your roof needs to be cut on both sides for the system to be installed. However, it is well worth the cost. Lomanco, Duraflo, and GAF are our suggested providers for this system.

  • Gable Vents or Attic End Vents: Self-explanatory. This system is found on the end of your home at the gable siding.
  • Intake Vents or Soffit Vents: The intake portion of your attic venting is typically in through the soffits. There are a number of soffit style vents. Stay tuned for our blog article on calculating intake venting.

Until next time,

The Team at GRS

Miscellaneous General Roofing Documentation

Choosing a Roofing Contractor for your Roof Ventilation Install or Repair

Our Roof Ventilation Guarantee – Lifetime Workmanship Guarantee
https://www.grscanadainc.com/Roofing_Installers.html

Our Roofing Portfolio
CONTACT US:
General Roofing Systems Canada (GRS)

24 Hour Emergency Roof Repair: Call +1.877.497.3528 toll-free.

info@grscanadainc.com.

British Columbia | Alberta | Saskatchewan | Manitoba | Ontario

Re-Roofing Your Home | Be Sure to Inspect Your Attic First!

General Roofing Systems Canada provides re-roofing services throughout Canada. Toronto, Calgary, Red Deer, Edmonton, Fort McMurray, Lloydminster, Saskatoon, Regina, Medicine Hat, Lethbridge, Canmore, Banff, Cranbrook, Kelowna, Vancouver, Whistler and points between.

Inspect your attic space before you start your residential re-roofing project.

Replace wood deck sheathing that is rotted or water damaged, analyze attic air exchange, and install attic air vents to be sure your attic is ventilating properly. Check for heat loss at the vapour barrier, be sure your insulation is doing the job, and replace plumbing boots, roof flashing, etc. as required while you are at it.

When replacing your residential sloped roof, it is critical to inspect your attic space first.

If you re-roof your home without inspecting the attic for roof rot, water damage, vapour barrier issues, heat loss to the attic, and proper air intake/exhaust, you are risking have to re-roof again in half the time or worse.

If this occurs, what was the real cost of your new roofing shingles?

Proper ventilation in your attic, building envelope heat loss, proper insulating, and other components of professional shingle re-roofing standards and procedures all play important factors in the process of a shingle roof replacement, and it greatly affects the length of time your new shingles will last.

The best roof shingles are shingles that are on the best roof system.

You can have the best shingles in the world and they will prematurely fail if your roofing system is deficient.

If you install a new shingle roof, and you do not check the attic space, you are SG1S1505really re-roofing shingles (or any other roofing material) with a lot of risk to your newly shingled system. Not to mention, most people decide to re-roof their home due to the fact that something is not right with their roof to begin with. We heard statements such as:

  • “The roof is leaking.”
  • “The roof is ice damming, and now snow or water backup is causing roof leaks.”
  • “The roof valleys are leaking.”
  • “Our shingles are just no good and they need to be replaced.”

The point is, there are many reasons roof shingles do not last as long as they should.

For example, if you have a vapour barrier issue (warm air from the inside of your home is entering the attic space) and the warm air entering your attic space is then causing ice damming on your roof, the ice damming then causes leaks (the ice or snow on the roof melts and freezes and melts and backs up under the shingles and then leaks into the attic, all because the underside of the roof sheathing is too warm due to heat loss into the attic). Moisture then causes roof rot to the sheathing which isn’t healthy. The ice backup on the roof damages the shingles and roof underlay, the moisture destroys your insulation, and the water leaking into your home can do all sorts of damage.

Before you re-roof your home and pay the cost for new shingles, you want to know if heat loss into your attic is occurring or your roof sheathing is rotten. If you do not do this before the new shingles are installed, you risk investing in new roofing and the roof rot not being uncovered and replaced, and the warm air coming in to your attic that now causes roof ice damming the following year and perhaps the roofers didn’t install ice and water properly or at all or metal to the roof valleys under the shingles or a host of other possibilities and now you have a brand new shingled roof that cost you an arm and a leg that is leaking with roof rot on the roof sheathing and you need another new roof! You see the possible problems? (Talk about a run on sentence!).

Ice and Water Membrane to Back and Sides of Roof Openings, Wall, StepFrom the same example, let’s say you do not do an assessment of the air ventilation and now you have a new shingle roof, AND your attic air intake is plugged at the soffits by insulation. On top of that, your roof vent exhaust isn’t working properly because you only have four duro-flo air vents at the ridge for a 2100 sq. ft. home/attic space. You’ve had leaking in your home due to condensation in the past and your roof system can’t breathe and your old shingles deteriorated prematurely with your last roof. By now you must be thinking “My roof or shingles only lasted 12 years, and the limited shingle warranty was for 30 years! What the heck?).

Well, news is that your new roof shingles will only last 12 years. Your new limited lifetime warranty on your shingles won’t cover the costs because your roof ventilation ratio is not right, your intake air is compromised because there is insulation covering the intake vents at the soffits, and the exhaust attic ridge vents can’t work properly either…. not to mention that your house is 80 years old and the vapour barrier is compromised and is letting warm air into your attic space, etc. etc. etc. Replacing shingles after having new shingles put on only 10 years earlier is not where you want to be (especially when the wife finds out that it wasn’t the roof shingles fault!). Anyway, sorry I am off track…

The lesson here is… your new shingles will last decades and decades and decades if the roof system and attic space is proper for the new roof shingles to perform properly (and you look like the wise leader of the home to boot!)

I think we all get the point here…

As of 2011, our new policies mandate that we cannot re-roof a home with shingles unless a thorough attic inspection is done prior.

The GRS Standard Re-Roofing Specifications and Pricing now allows for this service in the price we quote you for new shingles. It also allows for a venting analysis, new roof vents, plumbing boots, etc. in the cost of your new roof shingles. Movement of insulation away from the soffit areas is also in the cost of your new shingles, as well as replacement of deck sheathing up to 100 sq. ft. As long as you don’t have a major roof or attic space remediation issue requiring the services of a restoration expert, for the most part, the price you receive from GRS for re-roofing your shingles is the same price to also bring your attic space up to par so the system performs as it should.

Some examples of standard GRS shingle replacement specifications are:

Roof sheathing needs to be replaced if it is rotting (which is also a health risk) or has excessive water damage from ice damming back up – this is a Standard Specification in the GRS Shingle Re Roofing Cost and our shingle re roofing prices include up 100sq ft of roof sheathing replacement. Air ventilation calculations are required and an analyis of your attic ventilation is completed free of chaege, air vents are included in the new price of your shingles, inspection of the insulation and inspection of your vapour barrier is also included in the cost of your new shingles. Insulation replacement and vapour barrier replacement is not included in the price of your new shingles but the inspection is included and is complimentary.  

  • Request a Re-Roofing Assessment and Shingle Re-Roof Costs here.
  • Information on our Shingle Roofing Specifications and How We Install Roof Shingles is found here: https://www.grscanadainc.com/Pitched_Roofing.html.
  • Information on Hiring the Best Roofing Contractors is found here:

https://www.grscanadainc.com/Choose_Roofing_Contractor.html.

  • Visit the main GRS Website here.

If you have questions about our post on roof ventilation and the affects of your roof system on your new shingles, if you require emergency roof repairs, or just have a simple query call us 24 / 7 on our toll free line +1.877.497.3528.

Until Next Time,

The Team at GRS

CONTACT US:
General Roofing Systems Canada (GRS)

24 Hour Emergency Roof Repair: Call +1.877.497.3528 toll-free.

info@grscanadainc.com.

British Columbia | Alberta | Saskatchewan | Manitoba | Ontario

Rooftop Snow Removal

General Roofing Systems Canada provides roof snow removal throughout Canada. roof snow removal; Calgary, Red Deer, Edmonton, Fort McMurray, Lloydminster, Saskatoon, Regina, Medicine Hat, Lethbridge, Canmore, Banff, Cranbrook, Kelowna, Vancouver, Whistler, Winnipeg, Toronto and points between. British Columbia. Alberta. Saskatchewan. Manitoba. Ontario

Near Record Snow Fall Causes Roofs to Collapse

120 Inches of Snow Has Fallen on Rooftops in Anchorage, Alaska!

The snow just won’t let up in Anchorage, Alaska this year and roofs are starting to collapse due to stress from the weight load.

Nearly 120 inches of snow has fallen so far this winter making it the fourth snowiest winter on record and the situation has the municipality struggling to keep up.

SG1S1582
GRS 24 Hour Roof Snow Removal Crew Hard at Work on an Edmonton Commercial Roof.

Last year in Edmonton, AB we experienced the exact same problem. As a result of this GRS had hundreds of our roofers working day and night for a month to clear snow from rooftops. They were clearing roofs as small as homes to manufacturing and commercial buildings the size of football fields. This was truly a team effort of around the clock work! The members at GRS would like to send a message out to Anchorage Roofing Companies to stay safe and all the best! Also we would like to remind every one that Roofs do collapse so it is imperative to put those harnesses on and know how the engineering of roof systems work before you start removing the snow. We had a number of roofs last year almost collapse under our workers!

The following is an excerpt out of the Alaskapublic.org website:

“The continuing snowfall also has Sharen Walsh, the building official for the Municipality of Anchorage concerned. She’s worried about snow loads on roof tops.

“Well, we’re definitely watching the situation. And we have had some roofs in town that have shown signs of stress or strain or cracking. We’ve had, I believe people have seen in the news, two roofs that have actually collapsed,” Walsh said.

Those roofs were on older buildings with flat roofs with malfunctioning draining systems. She says most roofs are still okay. Another problem, Walsh says though, is ice dams created by heat sources such as ridge vents or plumbing vents that melt snow and refreeze it.

“Those are quite a nuisance. They can cause water damage within the structure. We’re to the point where if a person has an older structure, they’ve seen some signs of stress on it. Maybe some sheet rock cracking in their ceiling, they might want to consider lightening that load,” Walsh said.

Again everyone here at GRS is reminding people in Anchorage to stay safe!

ABOUT US:

General Roofing Systems Canada (GRS) is a Roof Repair and Replacement Contractor Servicing BC, AB, SK. Roofers in Calgary, Red Deer, Edmonton, Fort McMurray, Lloydminster, Saskatoon, Regina, Medicine Hat, Lethbridge, Canmore, Cranbrook, Kelowna, Vancouver, Whistler, and various points between.

CONTACT US:
General Roofing Systems Canada (GRS)
24 Hour Emergency Roof Repair: Call +1.877.497.3528 toll-free.

info@grscanadainc.com

Calgary, Red Deer, Edmonton, Fort McMurray, Lloydminster, Saskatoon, Regina, Medicine Hat, Lethbridge, Canmore, Banff, Cranbrook, Kelowna, Vancouver, Whistler, Winnipeg, Toronto and points between. British Columbia. Alberta. Saskatchewan. Manitoba. Ontario.

Re-Roofing: Applying Shingles in the Winter

General Roofing Systems Canada provides re-roofing services throughout Canada. Re-roofing projects are completed in the following cities: Calgary, Red Deer, Edmonton, Fort McMurray, Lloydminster, Saskatoon, Regina, Medicine Hat, Lethbridge, Canmore, Banff, Cranbrook, Kelowna, Vancouver, Whistler, Winnipeg, Toronto and points between. British Columbia. Alberta. Saskatchewan. Manitoba. Ontario.
Applying Shingles in the Winter? Roofing Contractor Guarantees? Attic Condensation? Roof Venting? 
The re-roofing post below is a continuation of an article written earlier this year that represents our discussions with a homeowner’s frustration due to an improperly installed re-roof.
On Wednesday, Nov 23, 2011 at 9:36 AM, our client wrote:
Hello,
I have a bunch of questions/concerns:
We were wondering what happens when we book a week and then that week turns out to be snowy or really cold, especially if that happens part way through the job?  Under what conditions do you not work? Do we have to be there when the work is being done? Our roof already has snow on it and because it is metal; it is very slippery. When our metal roof was being installed, the previous owners said that the roof was exposed during a rainstorm and it caused water staining on our walls.  I doubt we will get rain but will snow cause issues if you are part way through the job and it snows?  Do you do it in sections so that the roof isn’t fully exposed? Would a roof that is installed in the winter be any different in performance or workmanship than a roof installed in warmer temperatures? Will the high shingle cap be adequate for ventilation? And if it isn’t, what happens if we have problems? We are just concerned that we spend all of this money and we end up with a roof that still causes us problems.
For payment: I see at the bottom of the quote that you take VISA. What other methods of payment do you take?  I don’t think my credit card limit goes that high so could you combine credit card and personal cheque? Does payment happen after the job is completed or do you require a down payment?
We have company from Nov 29th to Dec 13th (not sure when they are leaving).  Does the 13th work, or will you be available early into the new year?
Our Response:
Dear —,
You have some very good questions in regards to the re-roofing process. There are many homeowners that rush into a re-roofing project without all the correct information. This unfortunately causes them to realize later on that something was missed, misrepresented, or simply should have been discussed.
With respect to how weather affects the shingle process with your home, more specifically in your instance , how winter roofing affects the shingle application. We have an off-site section of our main website that provides information regarding how to shingle a roof. This also details some examples of completing this type of project during the winter months.
Now with winter weather, especially the bitter cold or periods with large amounts of snow, this can push our crew schedules back across the entire company. Although with that being said, the winter can actually be a better time to complete a re-roof project as we don’t have to worry about the rain.
However, winter shingle application can only be completed with if the temperatures stay above  -18 C or better.  Applying shingles at temperatures below the shingle manufacturer’s recommendations can void your warranty.  Most manufacturers mandate installations above -18 C.
The perfect temperature for re-roofing shingles or the actual process of the shingle application is -10 to +10 C. Shingling is best done when it is not too cold as shingle nail blow-through occurs with brittle shingles (leading to shingle blow-offs when high winds come). Nail guns don’t fire properly in the extreme cold, and roof nails may not sit flush as the ice on the shingles may hinder the nails from sinking into the shingle and roof deck correctly. This is only one example of the various problems that could arise.
In continuation to the temperature, it is also preferred for it to be not too hot. If the temperature is too hot, this also causes damage to the shingles due to them cracking underneath our roofers feet. So the idea is to pick a week that has moderate temperature. We prefer late fall, winter, and early spring, yet with moderate temperatures preferably between -10 and +10 c. The snow on the roof is not an issue at all with re-roofing (unless it’s really extreme) as we close up what we work on everyday with the use of proper roof tarps, and if required, roof connections, etc. Sections of the roof are done one-by-one.
With regards to your roof venting and/or antic ventilation, proper roof or attic ventilation is more specifically assessed when the old roof material is removed (air intake at the roof soffit, air exhaust at the roof vents and/or ridge venting). If the roof’s ridge vent allowance at the peak is not appropriate, our roofers will cut back a half or full inch or whatever is required from the roof sheathing that meets at the peak.
The truth is that we guarantee our roofing workmanship for the lifetime you own your property.  We have a proprietary shingle application method that enables us to do this. However, we do see some instances where condensation issues in the attic or roof system continue post re-roof. No roofer, building envelope consultant, or engineer that I have met or roofed with know for sure what will happen, and no roofer can honestly guarantee that roof or attic condensation will not be a problem after the re-roofing is complete.
When our crews have completed the re-roofing there will be no leaks. The workmanship, roof application methods, and our exclusive specifications are guaranteed to be the best you can get in the roofing industry. The roof ventilation will be installed directly to code, and the roof shingles will be of a very high quality (search our blog for Malarkey, for example).
One consideration to keep in mind is the fact that roof or attic condensation can be caused by a plethora of building envelope scenarios. There are several roofers that leave potential customers feeling at false ease prior to starting a re-roof. They do this in an attempt to mitigate issues that may arise with condensation in the future.
Now in regards to payment for your re-roof, we do honour all credit cards and cheques upon completion. We do not take a deposit prior to the start of a re-roofing project . When the work is complete and you are completely satisfied, we then request payment in full.
A final note to scheduling your re-roof, we have a lot of flexibility from December 15 to February 15 each season. We can work around your schedule.
Thanks again for the great questions. Should you have any more, do not hesitate to contact us again.
Untill the next time,

The Roofers at GRS

CONTACT US:
General Roofing Systems Canada (GRS)
24 Hour Emergency Roof Repair: Call +1.877.497.3528 toll-free.

info@grscanadainc.com.

Calgary, Red Deer, Edmonton, Fort McMurray, Lloydminster, Saskatoon, Regina, Medicine Hat, Lethbridge, Canmore, Banff, Cranbrook, Kelowna, Vancouver, Whistler, Winnipeg, Toronto and points between. British Columbia. Alberta. Saskatchewan. Manitoba. Ontario.

Metal Roof Repair or Replacement?

General Roofing Systems Canada provides metal roof replacements throughout Canada. Metal roof replacements are completed in the following cities: Calgary, Red Deer, Edmonton, Fort McMurray, Lloydminster, Saskatoon, Regina, Medicine Hat, Lethbridge, Canmore, Banff, Cranbrook, Kelowna, Vancouver, Whistler, Winnipeg, Toronto and points between. British Columbia. Alberta. Saskatchewan. Manitoba. Ontario.

Metal roofing is a vague word in the roofing world as it can be used to refer to a variety of systems. There are metal roof shingles, steel shingles, metal slate profile shingles, metal shake-looking shingles, metal panels, standing seam metal roofing, corrugated metal roofing, metal roof tile that are coated with granules… you get the point. The options in metal roofing are almost endless now.

One consistency that remains among the variety available to you is this: metal roofing can last longer than any other kind of roof’ however, a metal roof that is installed incorrectly will only last as long or be as durable as the workmanship of the install. If the underlay, or the venting of the roof system/attic is not correct, then problems such as leaking and ice damming will occur. With the weather that we have been receiving this year, one might see their metal roof may leak in multiple locations as time goes on. It is a frustrating experience living under a metal roof that has not been installed correctly.

To Repair or Replace?

Yesterday we had an inquiry come into our call center that is very common for us to receive. We felt this particular case would be a good addition to our blog in an attempt to help clients in their future endeavours while completing roof projects. 

On Monday, Jul 25, 2011 at 1:27 PM, the client wrote:

Hello,
We have an interlocking style metal roof that was installed by company 5 years ago by the previous owners.  The roof leaks in the winter as a result of ice damming in the valleys, and in the spring shingles annually become loose (and have blown off) on the edge of one of the valleys from the ice sliding off.  I am tired of dealing with the company (long story) and we are wondering if there is any way to repair rather than replace what they did.  We have a log house with cathedral ceilings so I suspect we need to try to improve the airflow under the existing metal shingles. I don’t know what it looks like between our open ceiling and the metal shingles above (regarding insulation and air flow). There is no venting other than vented soffits (as far as I can tell). Is there any way to seal the metal shingles so water doesn’t flow back up under them?  I don’t know if any waterproof barrier was used in the valleys and I don’t think the roof was installed very well in some parts. After talking with the previous owners a couple years ago, I know they weren’t satisfied with the installation of the metal roof, but they ended up having to relocate before going through a winter.
A couple of other things to note;  a few of the metal shingles were damaged when we were trying to remove the ice from the roof this past winter, and when we had heavy rain, the water comes off the roof before making it to the eaves.
I attached a couple of pictures of the roof so you can see the design.
Based on these pictures, if we had to replace our roof, what would be our best options (type of shingles, venting, etc.), and how could we reduce the potential for ice damming and leaking? How much would you estimate replacing a 1400+ sq. ft. home’s roof with different types of materials?  Is there a guarantee on the ice damming/leaking after the roof has been replaced? Is there anything else I need to know or can I provide you with more information?
Our Response:

Good morning,

I’m the Project Manager for GRS. I travel across Alberta solving roofing problems. However, it’s peak season and I may not be able to get out and take a look as quickly as I would like. That being said, what I am going to do is send this email to our two senior sloped technicians/foremen at GRS as well as our scheduling manager.
Our scheduling manager will keep you informed on our work in progress, and either myself, or one of our foremen, will come out to meet you. In the meantime, I’ll offer for them to chime in their input based on your email and photos (great email by the way – it helps us a lot).
Here’s is my opinion in regards to your questions….
1. From the perspective of someone that sees literally thousands of roof problems a year, my first advice would be to not listen to just any idea of repair from just anyone. Metal roofing is a specialty. A very common thing we see is homeowners trying different “metal roof” contractors in haste and it tends to end with negative results. Both of our foremen are very senior technicians that would not have you running around a circle. If we don’t get to you as soon as you like, and you hire someone else, please make sure to validate the experience of the technician. It would be more beneficial to be thorough with your next selection as any experienced person can rattle off hundreds of client situations and references. In our case, we lay out our experiences on our blog to provide our clients and future clients with quick and easy access to references.
2. I think the end result of your situation is going to be a new roof replacement. Now I understand this is not what you want to hear, and you may find it convenient in a consumer’s mind for me to say.  However, I will explain the reasoning behind my conclusion. We don’t need to sell you a roof, we’re always over-booked so the motive isn’t there. Secondly, we see these installation issues all the time; our blog is full of how to do it right – and when it isn’t done right, it is almost impossible to correct. However, in saying that, both myself and my technicians may assess your building and be able to find a less expensive solution.
3. Based upon your descriptions, I am thinking that it is an inherent design/installation issue. Metal expands and contracts and is a water shed system – not waterproofing. The roof underlay installation is flawed at the valleys. At minimum, I would think the valley areas would have to be ripped out (probably 5 feet on either side) and proper underlay installation executed and metal tiles put back in or new metal tiles placed.
4. Even after doing all that, it is a low slope roof, and you may have intermittent issues either way. That is how I end up at the roof replacement as an end result.
5. With respect to ventilation, that likely could be assessed over the phone with one of our foremen.
So I may not have helped or may have, but the bottom line is that typically the best thing to do is to start over with a roof replacement. Get the underlay, the ventilation and the water shedding product right. Once this has been completed, I believe your issues will be resolved.
Thanks
 Client Response:
Thank you for replying so quickly.  I suspected that we would have to replace the roof.  This isn’t a rush job, but if we could get it done before snowfall, that would be great. If we have to over-winter this roof again, is there anything we could do in the valleys temporarily? Like heat cables or….? The interior log walls got water staining on them last year and I am concerned with the condition of the wood below the metal tiles in the valleys.  In the case with a low sloped roof, would asphalt shingles be a better alternative to metal?
Please put me on the waiting list for an assessment.
Our Response:
 

Good morning,

No problem. The day’s just getting going here so I had the time.
With respect to roof replacement before winter, yes this is very possible. However, I would like either one of my foremen or myself to look at your property prior. I would like to make an attempt at finding a less expensive solution.
If for some reason you were thinking of not approving the work before winter, heat cables aren’t a good solution. Short of using a high quality tarp on your whole roof, it won’t help.
Metal roof systems are fine as long as the underlay is correct. Shingles won’t leak as easily, but don’t last as long. Any roofing product will work as long as the roof underlay and venting is correct.
We will get out to your property as soon as possible to meet you and take a look.
Thanks

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CONTACT US:
General Roofing Systems Canada (GRS)
24 Hour Emergency Roof Repair: Call +1.877.497.3528 toll-free.

info@grscanadainc.com.

Calgary, Red Deer, Edmonton, Fort McMurray, Lloydminster, Saskatoon, Regina, Medicine Hat, Lethbridge, Canmore, Banff, Cranbrook, Kelowna, Vancouver, Whistler, Winnipeg, Toronto and points between. British Columbia. Alberta. Saskatchewan. Manitoba. Ontario.