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.
100_0709 - Copy
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.

100_0702 - Copy
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)

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

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

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 Replacement or Roof Repair

General Roofing Systems Canada provides roof repairs throughout Canada.  Roof 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 Replacement – To Replace or Repair the Roof?

The issue of whether or not to replace your roof or to just continue making repairs on the existing one poses to be a high debate this time of year. GRS thought it would be beneficial to others to post a roof report that came into our office that deals with this exact question.

To Replace or Repair the Roof: A Roofers Report

One of our Calgary Roofing Repair clients mentioned to me that he was having some issues with the skylights leaking on his cedar shake roof. The skylights were coming loose and causing damage every time we had a storm. He even had hail coming through it at one point!

He also mentioned some issues regarding the roofs chimney and how it had been leaking and that he was aware that the overall condition of the roof was in poor condition. Yet he still wondered if there was any way it could be fixed, focusing on the areas that were in the most urgent need of repair instead of replacing it all together.

The main house is a 12/12 roof with a 9Ft 5/12 section on all the eaves so the pitch change has flashing on it. Fortunately there are enough roof valleys and hips on the roof that we were able to make it to the top for a full roof inspection.

The first roof skylight we saw was the one that had been flapping around in the wind. The skylight was fastened from the inside and was about 25 Ft from the floor. The inside frame of the skylight had been ripped off from every fastening, all except for one screw. I was baffled as to how this skylight was not already blown away and laying in a field.

The back pan on this skylight along with three of the other four skylights was not running past the corner, causing it to leak. They had been tarred numerous times, yet the roof tar dried up causing it to leak again. This is the point in which the roof becomes a true nightmare.

The chimney had been decorated with stone work oer top of the flashing AND the existing roof where there is an area that is probably a short back pan on the top section. Lower down there is a diverter (Half saddle) which the top does not quite make it under the stone. It was either installed after the stone, or the stone was just not big enough to cover it.

I told the client in order for us to flash the chimney properly, the stones that were interfering would need to come off and put back on after the flashing was in place.

There are several areas where the cedar shake capping is missing, I would say there would be about two days’ work just to repair the skylights, chimney and replace the missing cedar shake capping. I told the client the cost required to fix all the damage would be a waste, as the money would be better spent going towards a new roof/ replacement where it would serve him better for many years to come.

Roof Replacement, Cedar Shake
Roof Replacement or Repair, Cedar Shake Roof Repair.
Roof Replacement, Roof Repair
The Roof Hips that Allowed us up to complete the inspection. Back pan on chimney skylight.
Roof Replacement, Shake Roof 2
View of the entire roof showing the extent of damage needing repair



Other General Roofing Systems Canada Roof Replacement Documents:

Choosing a Roofing Contractor for your Roof Replacement.

What Makes our Roof Replacement Installers Different – Lifetime Workmanship Guarantee.

Project References for Roof Replacement Portfolio.

Request Shingle and Roof Replacement Estimates and Costs Online.

Until next time,

The Team at GRS

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

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.

Velux Roof Skylight Review

Commercial Skylights
Commercial Skylights

General Roofing Systems Canada Installs and Repairs Velux Skylights throughout Canada. Skylight Installation and Skylight Repair services in Toronto, Calgary, Red Deer, Edmonton, Fort McMurray, Lloydminster, Saskatoon, Regina, Medicine Hat, Lethbridge, Canmore, Banff, Cranbrook, Kelowna, Vancouver, Whistler, and points between.



Skylights, like any other product that most roofers install everyday, are becoming more advanced and have more types and options available all the time. Choosing the right skylight, the right skylight installer, or skylight repair technician can be a challenge.

Choosing the right Skylight Installer or Skylight Repair Technician

Skylights - Residential Skylights and Roof Windows
Skylights – Residential Skylights
and Roof Windows

The real review of skylights or anything else we use on a daily basis is primarily determined by the installer. The number one word of advice we can give is to choose  the right contractor. A roofer that installers skylights regularly is your best bet, as the roof membrane, flashing, curb, and system itself may all be one issue. Once you have the right technician installing your skylights, the issue of choosing a skylight brand is the easy part. Most skylight brands are competitive in price and perform well.

At General Roofing Systems Canada, Velux Skylights are a standard. We use or recommend Velux Skylights regularly for these reasons:

  • Velux skylights offer suitable dependendable, and predictable performance. They have an excellent warranty structure and service to back it up. Sure, there may be specialty manufacturers that may suit a specific situation or performance requirement better, but all in all, Velux products are one of the standard recommendations we make.
  • Readily available. Velux is well-distributed in Western Canada and their service is exceptional.
  • Great track record. Founded by Villum Kann Rasmussen more than sixty years ago, Velux Skylights have a history of performance and dedication.
    Sun Tunnel (Roof Solar Tube)
    Sun Tunnel (Roof Solar Tube)
  • Variety of products. Whether it is a residential or commercial skylight, sun tunnel, roof windows, etc. Velux has many options to offer.


Velux Skylight Main Web Link

Velux Skylight Warranty

Velux Skylight Residential Skylights

Velux Skylight Commercial Skylights

Velux Skylight Sun Tunnels

Velux Skylight Roof Windows

Choosing a Roofing Contractor for your Skylight Install or Repair
Our Skylight Replacement Guarantee – Lifetime Workmanship Guarantee
Request a Skylight Replacement or Roof Repair Estimate
Until next time,
The Team at GRS
General Roofing Systems Canada (GRS)

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

British Columbia | Alberta | Saskatchewan | Manitoba | Ontario

Installing Roofing Underlayment/Roof Membrane

General Roofing Systems Canada provides the best shingle re-roofing specifications and installation available in the roofing industry to Toronto, Calgary, Edmonton, Red Deer, Lloydminster, Saskatoon, Regina, Medicine Hat, Lethbridge, Canmore, Kelowna, Vancouver, Whistler, and points between.

Re-Roofing Right. Why not install the roofing underlayment to the whole roof deck? Why not install it correctly? And why not use a roof underlayment that actually works and does what it is intended to do in the first place?

When re-roofing, roofers have a tendency to leave roofing underlay short at the roof edge when rolling it out (wind blown rain gets to the roof deck), or at the ridge of the roof (a ridge cap shingle cracks and a roof can leak), or don’t wrap their ridges and hips in underlayment hoping the shingles will perfectly do the job , or don’t run the roof underlayment or membrane up and under roof flashings, up and under skylight flashings, and wrap or neck tie roof penetrations with roof membrane such as roof vents, skylights, etc assuming that ice, snow, and water won’t back up under shingles and cause a roof leak.

Our roofing installation specifications call for the whole roof to be wrapped in underlayment or Ice & Water peel and stick membrane, and then we don’t have to worry about wind-driven rains, ice and snow backup, and ice dams at the roof edge or in valleys – all culminating in leaks. When we install a roof, the complete roof deck is wrapped in a “monolithic” style membrane specification and the roof cannot leak.

This specification includes running the roof underlay to the edge of the roof all the way, wrapping the ridge and hips into the underlay. -No part of the roof deck shows. Even on the coast, our roofs take punishing windstorms in places like West Vancouver.

Also, the roof penetrations (goosenecks, roof air vents, etc.) have Ice & Water membrane on the backside of the opening so that when ice, snow, and water build-up (ice damming) gets under the shingles, the roof underlayment is there to protect the roof from leaking. The same principle applies for installing a membrane at the wall and up & under skylight flashings (especially to the back side). Skylight leaks are one of the most common calls our emergency leak service receives.

Our roof installers also install Ice & Water peel and stick membrane to the valleys, right to the roof deck, and then metal valley flashing is installed on top of the membrane (even if the client wants a closed shingle valley, we still put metal flashing underneath the shingles), and then Ice & Water membrane is also installed to the top of the valley flashing edges so that when ice, snow, and water backs up in the roof valleys (ice damming which in Edmonton, Fort Mcmurray, Grand Prairie, Saskatoon, Regina, etc was so bad last winter) it can’t get back under the valley metal flashing and cause a leak.

At the roof eave we install Ice & Water membrane for ice, snow, and water back up at the gutters (last winter in Edmonton we had over 500 phone calls for ice damming at the eave on residential roofs alone – in one city during one winter!) – this is a primary area of concern for ice damming issues. The membrane sticks right to the roof deck and this avoids roof rot and roof leaks at the roof eave edge.

At the main area of the roof (the roof field) we use premium synthetic roof underlayment ( Premium Titanium Roof Underlayment ) which is twenty times stronger than roof felt underlay, it is lighter than tar felt paper, is recyclable, and doesn’t crack or rip at point of installation or from UV exposure.

If you (the homeowner that is getting your new roof) watched the roofing installation crew roll out felt paper at the point of re-roof installation, as seen right from the roof top… what actually occurs would cause you to never imagine EVER installing tar paper (felt paper) under your roof shingles. It cracks when the installers roll it out! This happens before it is even installed, and then it somehow has to go up angles at skylights, etc. And then the staple hammer tackers start whacking thousands of staples into it – each time the hammer tacker hits, it also tears the tar paper felt, and if it is cold outside it is even worse, and then the shingle nailers start and on one house 7000 – 12000 roofing nails are installed right through that paper. And to top it off, if you have a shingle blow off due to wind, do you think the brittle tar paper will even stay on the roof if the shingle blew off? What protects your home at that point? WE DON’T USE ROOF TAR PAPER – FELT PAPER – ROOFING FELT on our pitched re- roofing installations period – NEVER.

“t is the best possible roof underlayment specification and installation available to a homeowner for re roofing and is a standard specification for GRS Re-Roofing Installations.

Below are photos of a re-roofing project in progress that show the various areas of “small detail” in roof underlayment and Ice & Water membrane specification that creates a great re-roof end result.

Ice and Water Membrane to Back and Sides of Roof Openings, Wall, Step
Ice and Water Membrane to back of roof openings.
Ice and Water Membrane Under Valley Flashing, On Top Sides
Ice and Water Membrane installed to roof deck and then again to sides of metal valley flashing after metal was installed. Also note membrane wraps ridge and no wood is showing.
Premium Ice and Water Underlay to Eave and Along Step Flashing
44″ Ice and Water Peel and Stick Membrane installed to roof eave area where ice, snow, and water back up at gutters and get under shingles and cause roof rot and roof leaks. Synthetic premium roof undleryment installed to roof deck. Underlayment goes right to wall and up and under step flashing at wall.
Re-Roofing, Shake to Asphalt, Underlayment Wraps Hips, Complete Roof
Premium synthetic roof underlayment to field are of roof is wrapped over hip of roof and peel and stick ice and water at eave area also is wrapped over the hip to create a monolihic type roof underlayment installation. Photo also shows roof valley prior to installation of ice and water membrane and then valley metal and then ice and water membrane installed again at edges of valley metal.
Re-Roofing, Shake to Asphalt, Underlayment Wrap, Slylight, Complete Roof
Skylight is shown with ice and water membrane installed to roof deck and up and under the flashing of the skylight. Also note the field area underlayment is synthetic and runs over the ice and water detail at edge of skylight. Photo also shows coloured flashing at skilight and ice and water membrane to back of skylight area.
Re Roofing Underlayment Right to Roof Ridge and Edge - Not Cut Short
The photo above and the two below show synthetic underlay in field area of the roof installed right to the edge of the roof and not cut short. The roof underlay also is installed right to the roof ridge and is wrapped over the roof ridge and is not left short. The goose neck is wrapped in ice and water peel and stick membrane and the plumbing stack is about to receive installation of the flashing boot, but prior to the premium Karnak bead of caulking is placed on the roof deck and then the rubber boot flashing.

Re Roofing Underlayment Right to Roof Edge - Not Cut Short

Underlay Wrapping Ridge and Under and On top sides of valley metal



  • Click for an online re-roofing quotation.
  • For more information about our re roofing installation specs you can visit our pitched roofing section of our website here:

  • To visit our main website click here.

If you have any questions about installing your shingle roof properly, or you need emergency roof repair service, or just have a simple question about your roofing, give us a call anytime. We have roofing experts available 24 / 7!

Until next time,

The Team at GRS

General Roofing Systems Canada (GRS)

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

British Columbia | Alberta | Saskatchewan | Manitoba | Ontario

Roof Skylight Repairs and Installations

General Roofing Systems Canada installs and repairs skylights throughout Canada. Toronto, Calgary, Red Deer, Edmonton, Fort McMurray, Lloydminster, Saskatoon, Regina, Medicine Hat, Lethbridge, Canmore, Banff, Cranbrook, Kelowna, Vancouver, Whistler and points between.

Skylight repair and installation is a trade in and of itself. One of the most common calls that our call center receives is the “my skylight is leaking” call or the “I hired them to install my skylight and this went wrong, and now my skylight leaks.”

Repairs and Installation – Who Do You Hire?

Our recommendation for skylight repairs and installations is to hire a repair company that has roofers who also know, and are experienced in, skylight repairs and installations. The reason is that skylights are installed on a roof – more specifically, they are typically installed on a roof curb (the skylight is mounted to the curb), and the roof curb has special flashing designed for around it and/or the skylight, with the roof curb being attached to the roof system. After all that, the roof curb (if required), the skylight flashing, and the roof membrane must all be installed properly so that your home or business does not have a skylight leak or a roof leak. We continually recommend an expert roofer that is also an expert skylight installer to be the best skylight repair and installation technician you can get.

The Cause of Skylight Leaks

Skylight repairs are more difficult at times than our roof membrane repairs – tricky to say the least. The following are some of the causes of skylight leaking which need repair:

  • Leaking due to flashing failure/flat roof membrane repairs.

The skylight flashing installation is typically the cause for a skylight leak. Repairing skylight flashing can be challenging. The skylight flashing may be a special order, or the skylight flashing will likely be apart of the roof membrane. In the case of commercial skylight repair or residential homes with flat roof skylights that are leaking, this can become more of a challenge. If the skylight leak is on a flat roof installed skylight, you may need a certified SBS modified torching roofer to deal with the skylight flashing and the roof membrane, or in the case of TPO, EPDM, PVC, or even tar and gravel roofing scenarios, quite often you will need a specialized roofer and the skylight repair coordinated in one job.

  • Leaking caused by roof membrane failure at penetration.

Roof membranes break down over time. Your skylight may be leaking because your roof membrane was either installed incorrectly or it is simply breaking down from age. Nonetheless, you will need a specialized roofer to repair the roof membrane. The shingles or flat roof membrane will require the right roofer with the right skills for the repair.

  • Leaks caused from failure.

Skylights, like everything else, age and break down. It may be that some caulking repair is required at the skylight, or the flashing needs repair, or the curb has rotted and needs replacing. Typically, if age is the cause of the leaks, with advancements in technology, you are better served replacing your skylight versus repairing it.

  • Leak caused from condensation.

Skylights were not made like they are now say… twenty years ago. New skylight technology deals with most condensation issues and there are less repairs needed as a result. However, not even the best system can stop condensation from affecting it if your attic ventilation is incorrect or something else is causing your house or attic to not vent correctly. Condensation in your attic space, home or business can be complicated to repair. It can be similar to a wiring issue in a car: frustrating.

Choosing a Contractor for your Install or Repair

Our Replacement Guarantee – Lifetime Workmanship Guarantee

Our Roofing Portfolio

Request a Skylight Replacement or Roof Repair Estimate
Until next time,
The Team at GRS
General Roofing Systems Canada (GRS)

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

British Columbia | Alberta | Saskatchewan | Manitoba | Ontario

Emergency Roof Repair Situations

General Roofing Systems Canada provides roof repairs throughout Canada. Roof 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.

Emergency Roofing Repairs

Wind Warnings and Torrential RainFall has been causing roof failures in British Columbia, while meanwhile in Southern Alberta high Winds are Blowing Shingles, Shakes, and Tiles off Roofs Again.

This week has been tough on roof systems from the West Coast all the way to Saskatchewan. Our call center has been over-whelmed with wind related roofing repairs calls along the West Coast including Victoria, Vancouver Island, Vancouver, Vancouver North Shore, and in the Fraser Valley. While in Southern Alberta such areas like Lethbridge, Medicine Hat, Okotoks, and even into Calgary have been experiencing wind gusts of up to 120 km/h.

The unusual high winds have been tearing shingles off roofs and causing general havoc with a variety of roofs types. We have received calls with complaints of skylights blowing off or leaking, roof vents, flashing, and even roof hatches needing repair.

With the heavy rain on the West Coast, this has caused flat roofs to fail, this particularly has applied to those that have drainage issues or drains that are plugged. With the cycles of having warm air thawing to only freeze again due to the Chinooks in areas like Calgary, AB, this has been resulted in our 24 Hour Toll Free Emergency Roof Repair line to receive several repair calls.

We are finding that Roofs with improper attic ventilation are having condensation issues to areas even as far north as Edmonton and flat roofs are requiring more maintenance to clear drains that are freezing over with ice.

Solutions for Roof Repairs, Attic Condensation, and Roof Drainage Issues

There are some solutions we can offer to help with the various problems roofs have this time of year. However If you cannot solve the repair or maintenance issue by yourself, call our 24 hour emergency roof repair toll free number at 1.877.497.3528 and schedule a repair person to attend.

Flat Roof Membranes
Repair Crew Fixing Flat Roof Connected to an Industrial Metal Roof

Flat Roof Drainage Problems: Flat roofs unfortunately do require some regular maintenance, especially in high winds and freeze-thaw cycles.

Roof Drainage: The roof drains are prone to clog from leaves, tree branches, and with the ice and snow melting and freezing on the roof. Drainage problems on flat roofs can also be compounded by an inadequate slope of the roof. Nonetheless, a spring and fall maintenance of the roof is key to ensuring the roof bears well during bad weather. Click here to see our  Flat Roof Maintenance check list.

Roof Inspection: Extreme winds, heavy rain-fall, and snow and ice melting should trigger an inspections to be completed. It is preferable that this is completed during the storms to ensure our technician’s ability to see if the roof drains are clear.

Roof Slope Problems: With improperly sloped flat roof systems, there are solutions to mitigate these issues. An improper roof slope can be examined with our technician at the time of inspection or while we are performing maintenance to your roof.

Condensation in Attic Spaces

Roof Sheeting Mold, Attic Mold, Condensation II
Condensation in Attic Space

Sloped or Pitched Roof Attic Condensation Problems Attic condensation repairs or remediation tend to be a more involved process requiring a number of steps.

Solving Attic Condensation

Your attic require proper ventilation. You need to check the intake air typically at the roof soffits to be sure that there is enough air coming in to your attic space. Be sure to check that insulation is not covering the air from entering your attic by following the air flow along the roof sheathing to where you come to the ridge or peak of the roof.

Check the exhaust vents (typically by each square foot or along the ridge) to be sure they are not plugged with snow and see if there are enough roof vents. You will need about 1 square foot of roof venting per 100 – 300 square feet of attic. A calculation commonly used by our roofers for attic / roof ventilation is 1:250. If the air vents exhausting the intake air is appropriate then you need to check the vapor barrier of the attic. It cannot be compromised and be letting warm air in.

Warm air rises through the attic into the roof sheathing. The snow on the roof then melts and creates ice dams. The ice dams then back up under shingles, shakes, and tiles causing leaks in to attics and then ultimately in to your house through the ceiling. If none of these problems can be found in your attic, it is best for you to then call the experts.

Shingles Torn off in winds

Wind Blows Shingles off Improperly Installed Shingle Roof in Calgary
Shingles Torn off in Winds

High Wind damage and Roof Repairs to Shingles, Tiles, and Shakes Repairing Damaged Roofs: Ultimately, after the installation of shingles, tiles, or shakes are complete and the winds begin to increase, you can now face blow-off problems. The best we can do is repair the windblown damaged roof.

How to Shingle a Roof: Prior to having your roof replaced, it is a good idea to know the specifications and the proper way to shingle a roof to ensure your roofing contractor is in check at time a roof replacement is required. Our website has a series on How to Shingle a Roof that explains the process of shingling for areas with high winds and how to avoid costly repairs due to wind damage.

Roof Underlay: Beyond the actual installation principles when replacing your shingles, shakes, or tiles there is the issue of the roof underlay. If the proper roof underlay is used and is installed correctly, then one does not have a concern in regards to shingles, shakes, or tiles being blown off. The roof underlay or membrane will keep the roof water-tight with-out the shingles so no leaks occur.

Shingles for High Winds: Finally, there are roofing shingles available that are designed to withstand high winds. Shingles like the Malarkey Legacy have high wind ratings of up to 170KM per HR which gives areas like the West Coast, North Shore of Vancouver, Calgary, Lethbridge etc. some advantage over the winds that damage roofs every year.
Should you have any questions or concerns regarding your roof, our office is always able to provide over the phone advice, set up inspections or arrange for a complete repair.

Until Next Time,

The Team at GRS

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

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.

High Winds in Southern Alberta Cause Severe Roof Damage

General Roofing Systems Canada provides emergency roof repairs  throughout Canada. Emergency Roof 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.

Today in Calgary, Alberta , wind storms created havoc for all commercial and residential owners. The high winds caused shingles to be blown of rooftops and even entire commercial roofs to be blown completely away. GRS has received several reports of skylights and shingles being torn completely off and thrown into traffic. As a result of the vast amounts of damage surrounding the Calgary area, the GRS crews are at capacity.

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Weather Warnings

As of Sunday November 27, 2011 at 18:30, severe weather warnings for high winds are still in effect for the following areas:

Airdrie, Bow Island, Bow Valley (Provincial Park), Brooks, Calgary, Crowsnest Calgary (Olympic Park), Canmore, Cardston, Claresholm, Cochrane, Drumheller High River Kananaskis (Nakiska Ridgetop) Lethbridge Medicine Hat Milk River Okotoks Onefour Pincher Creek Stavely Strathmore Suffield Sundre Taber Three Hills Vauxhall Waterton Park Willow Creek (Provincial Park).

High Winds Cause Havoc to Roofs and buildings

Industrial Roofing, Sparwood, BC
Emergency repair crews

Downtown Calgary and surrounding areas have had buildings glass shatter causing Calgary Firefighters to scramble in attempt to clear all debris to prevent any injuries happening to citizens.

The amount of damage that this wind storm has caused is impressive. Normally with wind storms the damage is isolated to one city and area, yet this particular storm is spreading its wrath to all of Southern Alberta. The damage that is causing is not isolated to only knocking down trees and power line. We have been receiving various types of reports of damage being caused.

In Airdrie we received reports of a church losing its siding, while in Fort Macleod, a gas station had its entire roof blown away. In Beiseker, grain silos and commercial roofs were being blown completely away.

The same variety of damage has been reported all the way to Lethbridge and surrounding areas. Grass fires have even began to occur due to the intense wind.

At the top of the Calgary Bow tower, the winds were recorded to be at a dangerous 140 km per hour, whereas in other parts of Southern Alberta is has been reported the wind gust are even stronger in areas such as Nanton and its surrounding municipalities.

The 911 call centers have been over loaded with calls relating to roof damage. As a result of this Calgary has engaged the Municipal Emergency Plan.

Steps for Fixing Damaged Roofs When high winds blow shingles, tile, and metal or damage your skylights:

1. Emergency Roof Repair Services. Call a roofing company and get on their emergency service list. In our case, we are asking emergency call ins to continue calling other Calgary Roofing Companies to be sure the soonest available emergency crews can come and assess the damage. At GRS, we are keeping a running list of home-owners and businesses that require emergency roof repair service and we are dealing with the repairs on a first call – first serve basis.

2. In extreme high winds, such as those in Calgary today, for your safety we advise you to stay away from windows and stay indoors. Due to the winds blowing off various forms of sidings, tiles, shingles skylights etc., it is unsafe to be outside with this vast amount of debris being blown around.

3. Roof Insurance: Be sure the roofing company selected to attend the repair of your shingles, commercial roof, metal flashing, or skylight keeps excellent record. You will need accurate photos before and after the roofing repairs. Make sure to ask the emergency roofers to provide you with copies of photos for your roof insurance company. Also, ask the roofing company to quote you for a complete replacement and have photos documenting all damage to your roof or skylights. After the immediate roof repairs are done, you can then address your possible roof insurance claim properly. Commercial properties are more apt to engage their Commercial Insurance Adjusters right at step one.

4. Choosing a Roofing Company: Be sure the roofing company you choose to do the roof repair work has a City Business License, have provincially incorporated roofers, Better Business Bureau registered and able to provide written receipts. Ensure that they take photos of work done for your roof insurance companies records. A quick check of complaints registered at the Better Business Bureau on line can help determine if the company is reliable. If it is a commercial or industrial roof repair, be sure the emergency roofers are qualified specific to the commercial roof system type.

5. After the emergency roof repairs are done, you have will have photos of the roof damage, and will now be dealing with your roof insurance company. Remember that insurance companies will refer you or want you to deal with specific roofers. However, in many instances, you have a choice as to which roofing company actually does the work. High Wind Shingles (Wind Resistant Shingles) Shingle manufacturers do make shingles rated for high winds.

Until next time

The Staff at GRS

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

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.