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:

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

  • 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

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

Roof Snow Removal: Alaska Digs Out

General Roofing Systems Canada removes snow and ice throughout Canada. Flat Roof Repair; 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.

CAUTION: DO NOT REMOVE SNOW FROM THE ROOF YOURSELF!

GRS Canada, Inc. has removed snow and ice from hundreds of residential, commercial, and industrial rooftops throughout Alberta, BC, and Saskatchewan.

We have also consulted facility managers at commercial and industrial facilities all over the world on proper snow removal protocols, techniques, and adherence to structural engineering. Live loads on rooftops are important to consider, proer safety for the workers on a roof is critical, and knowing how to remove snow from a roof may just save the lives of the workers and occupants in the building.

Our article on rooftop safety and roof snow removal was spurred by the roof collapse in Anchorage, Alaska and the subsequent news reports talking about “roof snow removal parties”. Our concern is that folks think it is OK to remove snow from roofs without using professional providers.

MUNICIPALITY OF ANCHORAGE ISSUES PRESS RELEASE MARCH 2, 2012

ANCHORAGE– In the last few weeks several roofs in Anchorage have failed due
to stress from snow. The buildings involved were generally older (pre-1980) with
flat roofs. Several, but not all, failed where snow had drifted.
Newly fallen snow is not very dense. However, over the course of the winter
accumulated snow on roofs becomes denser. Per current code the design snow
load in Anchorage is 40 pounds per square foot (psf), which is equivalent to
approximately two feet of dense snow. A roof designed to current code should
not have problems until the load is significantly higher than 40 psf.
It is recommended that building owners and managers monitor the snow loads
on their roofs. Of special concern are older buildings with flat roofs, and those
with areas of snow drifting, such as at parapets and lower roofs. Special
attention should also be paid to long overhangs where snow blankets are draping
over the roof edge.
If one hears creaking in the roof, observes excess deflection in trusses or beams,
or sees bowing of columns, immediate investigation by a structural engineer is
warranted.
Conditions on roofs may worsen as additional snow falls in March and April,
building owners should consider preventative roof shoveling. Shoveling a roof is
inherently dangerous, so special precautions should be taken. The intent is to
lighten the roof load by removing a significant portion of the snow, not
necessarily all of it. Trying to remove all of the snow down to the roofing could
increase the danger of a shoveler sliding off the roof as well as causing damage
to the roofing materials.”

DO NOT REMOVE THE SNOW FROM YOUR ROOF YOURSELF – ROOFS COLLAPSE.

Firefighters responded to a callers reporting structural collapse at the South Anchorage church Friday March 2, 2012. Firefighters initially were called with reports of a fire at the Abbott Loop Community Church at 2626 Abbott Rd. shortly after 6 p.m. Callers reported smoke, including one caller reporting an explosion.

ROOF SNOW REMOVAL PROTOCOLS AND CONSIDERATIONS

How much snow is too much?

Live loads are an important consideration when assessing rooftop snow and possible removal. You need to know how much snow and ice rooftaps can hold safely, what the effects are of ice buildup on roof systems, and how to properly remove the snow so that the building does not become structurally unsound and collapse while you are removing the snow.

Generally speaking – and depending on where you live – most flat roof systems are constructed to safely hold a maximum of 15 to 20 cm or ice or 35 to 40 cm of hard pack snow (70 to 80 cm of fresh snow).

There are many other considerations such as the engineering and age of teh building, or how often the roof can withstand the snow loads.

In Alberta, building codes (as of 2006) require roofs to withstand about 40 lb. of snow per square foot once every 50 years. In this fashion, one can predicate how much their building can withstand every years.

If the snow load on your roof is getting close to the calculations above, you need to have the snow removed from your roof.

Time is also important when considering roof load capacity – this is called the fatigue factor.

Roof collapse can occur on roof systems that have half or less of the live load described above.

Measuring Roof Snow Loads

A “safe” amount of snow or ice on a roof is none at all. Removing the snow will mitigate ice damming, which will keep the roof membrane in a good condition. Regular removal will also keep the roof drains working properly.

When the ice and snow starts melting in the spring, be sure a knowledgeable roofing contractor or a trained maintenance person is regularly checking the roof drains or scuppers to ensure that the water is flowing down the drains, as opposed to filling your flat roof up like a pond.

If you are still convinced that you can remove the snow and ice from the roof yourself, please refer to our blog article here. We provide safety considerations as well as a “how-to” guide.

IN THE PRESS…

From the Edmonton Sun Newspaper:

“General Roofing Systems advises that the snow isn’t as much 
of the problem as is the ice build-up underneath. Snow melts, it freezes and then is covered by a new layer of snow. The process repeats until the ice sheet becomes too heavy for the roof to bear. Trouble may not show up until the spring thaw when water that ended up freezing in the attic melts and comes through the ceiling. Then, of course there is the possibility that all that weight will 
cause structural failure.”

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

Welcome to our Roofing Blog.

The official roofing blog of General Roofing Systems Canada (GRS).

The purpose of this blog is for staff to enter roof repair, inspection and installation articles, reviews, news and such to a company blog on a regular basis. This blog is intended as an add-on to our main roofing website and will deliver the reader more detailed and interactive information about roofing disciplines.

We have also set up local micro-blogs regionally for specific roofing site articles that apply geographically to our customers. Here we will often refer to those local micro blogs in our articles and expound on their topics for more in-depth articles.

We hope that you become interactive with us by calling or commenting at the bottom of each article, filling out our online contact form, or emailing.

Send us your questions or sharing your experiences in an effort to further share roofing knowledge with our customers.

If you would like to be a guest contributor, contact us with your article ideas and we’ll respond as soon as possible.

A Bit About Us – Canada’s Leading Roofing Contractors:

General Roofing Systems Canada (GRS) started in 2007 as a small family run roofing subcontractor.

Over the years we have developed in to a full service exterior renovation and waterproofing contractor servicing customers from Vancouver to Toronto and all points between.

We service residential, commercial, industrial, institutional and even agricultural customers.

Our credentials and expertise are second to none. We employ journeymen red seal roofers that work on small to the largest sites in Canada for the most sophisticated specifiers, engineers, architects and companies. We are the trusted roofing contractor for millions of square feet of roofing replacements, inspections, repairs and maintenance annually.

How to Contact or Share With Us:

  • By telephone: 24 hours at 1.877.497.3528 toll free.
  • Email us at info@generalroofingsystemscanada.ca.
  • Fill in our online contact form.
  • Comment below in the comments area.
  • Visit us on our social media sites.

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

Contact Form.

Low Slope Roofing- Choosing the Right Flat Roof Membrane

General Roofing Systems Canada provides low slope installations throughout Canada. Low slope installations 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

The inquiry below came in to our call center today, we thought it best to post it as an article to our blog to assist others who have questions regarding Low Slope Roof Membranes.

The email conversation below contains standard questions and answers that our clients have when choosing the correct “low slope roofing” or “flat roof membranes”.

The following items are a listing of the topics covered amongst the email; low slope roof life cycle costs, choosing the right roofing contractor, low slope roof prices, roof installation quality, choosing the right flat roof membrane, differences between various flat roof systems, and many more.

RE: A roofers perspective of low slope / flat roof costs, life cycle costs, torch down 2difference between flat roof systems, and most importantly  roof craftsmanship.

Email Conversation:

Hello,

I am presently in the middle of preparing to build a new office space with a low slope. My architect was advising the TPO material for it being more “green” and its heat reflection.

 However,in my internet search, the results and outlook for TPO roofs is still in question. I am looking towards the old standby 2 ply SBS and I writing this letter to you as you do all these products.

 Which one would last longer and what is the cost difference between the 2 products… also include PVC if you can.

 Regards,

 

Dear valued client;

Thank you for your inquiry.

We have been receiving a lot of the same sort of inquiry lately (what are the cost of flat roofs, the life cycle cost of flat or low slope roofing, and the difference between low slope or flat roof membranes).

Generally we tend to receive these types of inquiries at this time of year, this is primarily due to commercial, industrial and home owners having time to complete research as a result of the holiday season.

With saying that, I am going to post your questions about low slope roofing to our blog along with my answers (in article form) so that our conversation(s) will assist others when researching about low slope roof membranes and roofing contractors.

Your “Roof Life Cycle Cost” will be determined as follows: 90% will be a result of the roof installation quality and 10% will be determined from which low slope roof membrane is selected.

For every ten hours you put in planning for your new flat roof, nine of those ten hours should be researching and selecting the right contractor for your project. If you put in a total of 5 hours planning your flat roof project, 30 minutes should be spent considering the different flat roof membranes available and 4.5 hours should be spent researching, selecting, and communicating with your new flat roofing contractor.

The most important aspects to considering a Flat Roofing Contractors is; Roof Workmanship Quality, WCB, BBB reports, Insurance, Liability, Warranty, Guarantee, Safety programs. Although it is not necessary that the flat roofer is a member of the BBB because complaints can be lodged whether a company is a member or not.

Random consumer complaints are not that important due to the fact that anyone can rant about anything online (It is impossible to make everyone happy 100% all the time), yet complaints to the BBB should be given serious consideration as the BBB has a highly professional process required for authenticating complaints.

The workmanship guarantee is to be considered one of the greatest factors to take into consideration.  In some ways this is even more important than the roof membrane manufacturer warranty.

Alongside this there are other considerations to keep in mind such as insurance coverages for example:

A) Work Safe / WCB clearances (you are able to get one from Worksafe / WCB),

B) Commercial Liability Insurance (which should be 5,000,000.00 – some go as low as having only 2,000,000.00 insurance),

C) Roofing Contractor’s Safety Program (which ensures the workers are actually being safe while on your site including the use of hard hats, vests, harnesses, daily hazard assessments etc.)

These are all important considerations that help protect the customers. An injury to a worker can be a significant issue for a home or business owner if the roofing contractor has not followed the proper compliance procedures. Such an event like this can cause you considerable expense and aggravation.

TPO Roof Life Cycle Costs

Now in regards to your question pertaining to TPO Roofing and life cycle costs, unfortunately this is still unknown. Perhaps not scientifically, but from a flat roof installer perspective it is.

Statistically speaking, we have more data specified to PVC roofs than we do TPO. The reality is that all low slope roof membranes have similar life cycle costs. Yet when you consider them statistically or scientifically they do vary, but all in all, low slope or flat roof membranes all perform quite well.

However, coming from a “roofer’s perspective”, here is what I can tell you; An issue that we as roofers see every day on the roofs, which in truth should be your highest priority in research is the actual installation of the material itself. Numerous building and home owners alike are unaware of the actual process, procedures and potential roof failures due to improper installation of the flat roof.

Another area of concern is the other workers that will attend the roof during construction or after, such as HVAC installers for an HVAC retro-fitter.

Now with the assumption that the contractor is reliable and adheres to all the proper regulation, the reality is that things can happen when a flat roofs are being installed. No company is flawless and has a perfect flat roof installation every-time.

In the offices, we here several conversations about how things can and do go wrong, yet it is how we deal with the problem that separates us from success or failure with other roofing contractors. We see time and time again, people that do not do their proper due diligence because they assume things should just go without incident. Although this is not like buying a car. Hiring a trade is much different.

Of course on the other side of managing roofers or the installation of flat roofs is that there is the pro-active side of things that says there are things that we can do as the roofing contractors before problems arise to assist in a higher probability of a proper roof installation occurring.

Now, in our instance we have done things like institute our industry with an Unconditional Lifetime Guarantee which causes our roofing staff to be more aware of the day-to-day incidents that could occur. It is our responsibility to provide superior roof craftsmanship. This has our staff in a more stringent project path for a flat roof installation quality control system. Ultimately, the craftsmanship itself is what most determines the true cost of your flat roof and not which flat roof membrane or flat roof system was chosen.

Once you get past the issue of the quality of installation for your roof and hiring the right contractor you can then consider which roof membrane to use.

Now to provide some answers specific to your questions, here are some considerations for your low slope roof membrane research;

 

With respect to traditional low slope roofing (SBS, TPO, PVC, EPDM, BUR) I would recommend using 2 ply SBS modified with complete confidence.

The reason is that with a single ply, you have opportunity for what we call catastrophic Failure. In other words, a hole the size of a quarter in the membrane can cause significant damage to the complete system as the water can travel. With SBS, it is torched down and the opportunity for water migration is less. Here’s one other factor to consider with SBS modified, if you have roof installer that does not install the membrane correctly, this will result in you having significant issues. The deficiency list can be considerable and cost more than replacing the roof in the first place.

Now, You didn’t ask about multi-ply low slope roofing specifically, yet I am going to take the liberty of giving you a couple of thoughts regarding those systems. You are able to get a multi-ply low slope roof like the Tough Roof System that will give you the reflective values you desire. Additionally, you will get the sense of security knowing your roof will have maintained durability. The Tough Roof is a multi-ply built up (BUR) roof system that has layers of bitumen (in this case a synthetic layer in between instead of the traditional felt mats between each layer) and on the top, Tough Roof uses white elastomeric roof coating which contributes to the reflective component.

The other option you have in these newer systems is a multi-ply liquid rubber system which is VOC free, completely environmentally friendly and you can cover it with an acrylic reflective top coat. The system is a proprietary system from General Roofing that includes 2-4 layers of liquid rubber with a synthetic fabric between layers of built up and with an optional top coat of acrylic reflective roof coating. Of all the systems you can get, this particular system is most environmentally friendly, it is bullet proof like the built up roofs, and it can be as reflective as you choose.

So ultimately your choices are; traditional 3-4 layer built up roofing (Tar and Gravel) which is 3-4 layers of tar with tar felt paper in between, then the 2 ply modified bitumen which is torched down, the single ply roofing (EPDM, TPO, PVC) which is mechanically fastened, fully adhered, or ballasted, and then the newer type of built up roof like the Tough Roof which is 3-4 ply of tar with synthetic fabric between the layers with an elastomeric top coat for reflectivity and the newer built up liquid rubber systems from GRS that are 2-4 layers of built up liquid rubber with a synthetic fabric between the layers with the option of a reflective top coat of acrylic elastomeric roof coating.

From least expensive to most expensive the roof membrane systems typically go from least expensive to most costly as follows; Spray Foam, EPDM, TPO, PVC, 2 Ply, GRS Liquid Rubber BUR, Traditional BUR, Tough Roof. However, it is important to note when considering the cost of a flat roof or a low slope roof system two things. First, the cost difference between flat roof systems as you go from one to the next is small in comparison to expected life cycle cost planning. For example, EPDM roofing is moderately more costly than Spray Foam, and PVC moderately more cost than TPO and on and on as you go through each system. Yet the important consideration is the cost of the roof over a period of time. A properly installed Tar and Gravel roof or properly installed 2 Ply SBS Torch on Roof will likely last much longer than EPDM, TPO, or even PVC – “likely” has a number of considerations…. weather, application, service workers on the roof, etc. And a Liquid Rubber Built Up Roof and the Tough Roof built up systems have almost unlimited life cycle as they both come with maintenance agreements to renew the top reflective layer of elastomeric coating.

I hope this has helped answer your questions, please feel free to contact us any time should you require more information or would like to ask us more questions.

Until next time

The staff at GRS

 

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