Calgary Commercial Roofing

General Roofing Systems Canada Repairs, Replaces, and Maintains Commercial Roofing to the Greater Calgary Area. Below is a Commercial Roof Installation Project Spotlight of the MOVAC Head Office Commercial Roof Installation.

Calgary Commercial Roofing Project Spotlight

Commercial Roof Installation Scope
MOVAC Head Office
New Construction
Engineered Sloped Roof Insulation
4 Layers Mop on Bitumen
SBS Modified Base Torch On
SBS Modified Cap Sheet Torch On

This commercial roofing project that is  located in the South East of Calgary, Alberta was for a new commercial building for Movac. The project included vapour barrier including 4 layers of mop on bitumen, a sloped engineered insulation package from Plasti-Fab and IKO base and IKO SBS modified bitumen cap sheet.


Calgary Commercial Roof, Bitumen Mopped
Calgary Commercial Roof, Installing Tar Flood Coat
Calgary Commercial Roof, Mechanically Fastern Roof Insulation
Installing Engineered Slope Insulation
Calgary Commercial Roof, Tar Flood Coat over Roof Insulation
Commercial Roof Ready for Rooftop Units
Calgary Commercial Roof, Tar
Tar Roofing –  in Calgary, AB
Calgary Commercial Roofers, Base Mechanically Fastened to Steel Q Deck of Roof
Roof Board installed to Steel Q Decking
Calgary Commercial Roofers, Roof Hatch Install
Roof Hatch installation.
Calgary Commercial Roofers
Bitumen flood coat to completed.
Calgary Commercial Roofing
Fibre board mechanically fastened prior to SBS Modified Torch On.
Commercial Roof Calgary
Rolling out hot bitumen layers to this .
Commercial Roofers Calgary
Commercial roof system – shows layers of the roof – almost ready for SBS modified torch.
Commercial Roofing Calgary, SBS Modified Torch On, Metal Roofing, Flat Roofing
Commercial roof has SBS Modified Torch On Cap Sheet Installed (grey torch on cap).
Commercial Roofing
One of our Calgary Commercial Roofing Roofers Got Creative by taking photo from inside of where roof scupper would be installed.


Visit our main website for more information on our Calgary Commercial Roofing services.


Until Next Time,

The Roofers 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, Canmore, Lethbridge, Medicine Hat, Vancouver, Whistler, Cranbrook, Saskatoon, Regina, Winnipeg, Toronto and all points between. British Columbia, Alberta, Saskatchewan, Manitoba, Ontario.

Asphalt Roof Shingles: Choices and Reviews

General Roofing Systems Canada (GRS) Offers Asphalt Roof Shingle Replacement, Repair, and Maintenance in 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.

Asphalt Shingle Re-Roof Material We Use and Review Below

IKO Shingles:

GRS repairs and replaces IKO roof shingles on a daily basis.

IKO Roofing Shingles

IKO has a full choice range of shingle materials and has representation in Alberta, British Columbia, and Saskatchewan (IKO started in Calgary). IKO shingles are readily in stock at suppliers and retail stores like Rona. The quality is very consistent as well. The Cambridge, Royal Estate, Grandeur, Armourshake, and Crowne Slate are some of our roofer favourites.

IKO Armourshake Shingles
IKO Armourshake Shingles

From the IKO roofing website, “IKO believes the success and longevity of their company is attributed to three key ingredients: Top quality products, continuous innovation and state-of-the-art manufacturing facilities. A family-owned company now for three generations, IKO intends to be around for many more. IKO products are found on distinctive residential, commercial and engineering structures in more than 50 countries. IKO operates over 20 manufacturing plants globally.” [ Source: ]

GAF Shingles:

GAF was founded in 1886, GAF is North America’s largest manufacturer for commercial and residential roofing.


From the GAF Roofing Website, “GAF attributes its success to be a unique philosophy of: Helping property owners & architects to make their best and safest roofing choices, helping supportive distributors and roofing contractors to build their businesses and avoid hassles.” [ Source: ]

GAF Tru Slate - Slate Roof
GAF Tru Slate – Slate Roof

The roofers at GRS consistently rate GAF offerings (complete line) to be of excellent quality. GAF also provides specific solutions for various roofing requirements. They manufacture a premium asphalt roof shingle with a wide range of options for shingle style, texture, colour, and optional material that can be used for re-roofing your home (for example, GAF Tru Slate).

Certainteed Shingles:


From the Certainteed Website, “CertainTeed is a subsidiary of Saint-Gobain, one of the top 100 industrial companies in the world. Saint-Gobain employs approximately 22,000 people in North America and more than 109,000 people in 64 countries world-wide.” [ Source: ]

Certainteed Roofing has a comprehensive offering of quality asphalt roof shingles. Some of them are known as top performers in their specific categories.

The reviews and ratings of asphalt roof shingles from the roofers at GRS reflect this statement as well. The Presidential, Landmark, and GrandManor Certainteed shingles compete extremely well in their respective categories. Our roofers consistently report the quality to be consistent. We have had excellent commercial and residential roofing success when re-roofing with Certainteed shingles like the Presidential, especially in areas where a shake-looking shingle is the only option (beyond real cedar shake) to comply with the architectural controls of a residential neighbourhood.

Malarkey Shingles

From the Malarkey Website, “Since 1956, Malarkey Roofing Products™ has operated as a family owned, professionally managed, privately held company, headquartered in Portland, Oregon. Malarkey believes in creating long-term value for customers and business partners. Striving for excellence propels Malarkey to new heights in polymerization and the development of long lasting products.” [ Source: ]

If you know anything about GRS and the position or ratings our shinglers take with respect to Malarkey, you will know that the reviews from our roofers are always positive.

Malarkey shingles are, in our estimation, one of the best alternatives to more traditional or popular asphalt roofing shingles like the BP Harmony, IKO Cambridge, etc. Not that these examples are poor shingles – they are very good asphalMalarkey Roofingt shingles in their respectively categories. It also is not fair to compare a Malarkey Legacy with the Zone nailing strip and the modified rubber polymers in the shingle versus an asphalt-based shingle in a completely different category. However, what we do try, whenever possible, is to move our customers that would normally consider something along the lines of a BP Harmony or IKO Cambridge into a more premium SBS rubber-based IKO or Malarkey product (such as the Malarkey legacy shingle). Comparing a Malarkey Legacy versus an IKO Cambridge is not a reality; you have to compare a

Malarkey Legacy Shingle
Malarkey Legacy Shingle

Malarkey Legacy versus an IKO rubber shingle, not an asphalt one. The reason we try to move our customers up just one step in pricing is that the price difference is nominal for the premium quality you receive. Instead of a “good” asphalt shingle, you get a “great” one with SBS rubber modifiers.

Calgary, Alberta recently experienced two wind storms that blew shingle off approximately 25,000 – 50,000 rooftops in Calgary and Southern Alberta. We experienced not one blow off with the Malarkey Legacy shingles. Now that, in our opinion deserves a high rating!

Owens Corning Shingles


From the Owens Corning Website, “Owens Corning is a global residential and commercial building material provider. A Fortune® 500 Company for 57 consecutive years, Owens Corning is driving sustainability by delivering solutions, transforming markets and enhancing lives.” [ Source: ]

Owens Corning asphalt shingles are now represented and readily available in British Columbia, Alberta, and Saskatchewan at roofing suppliers and retail stores such as Lowes. The quality of the Owens Corning asphalt shingle has always been good, alongside a comprehensive choice of colours, models, and textures.

Owens Corning Colonial Slate
Owens Corning Colonial Slate

Our experience with Owens Corning is more limited than with BP, IKO, Malarkey, GAF, and Certainteed but all indications are from the ratings and reviews from our shinglers is that they are a good quality asphalt shingle.

BP Shingles:

The BP asphalt shingle line-up is well represented in Western Canada and includes the Manoir, Everest, Mystique, Harmony, Mirage, Yukon, and Dakota. The Harmony shingle is the most popular of the BP shingles and it is available in a wide selection of colors. [ Source: ]

Cedar Roof Shake Looking Textured Shingles:

Metro Metal Shingle
Metro Metal Shingle

Designer asphalt shingles such as the Certainteed Landmark TL, Certainteed Presidential TL Ultimate, GAF Elk Grande Prestique, Certainteed Presidential Shake, GAF ELK Grand Sequioa, GAF ELK Grand Canyon, GAF ELK Country Mansion, GAF ELK Camelot, Certainteed Carriage House, Grand Manor, and the IKO Royal Estate and Armourshake shingles are examples of designer materials that achieve textured roof profiles.

For asphalt roof repair or replacement pricing call us at +1.877.497.3528 or click here for an online re-roof price estimate request form.

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


IKO Shingles

IKO Crowne Slate Shingle Reviews

General Roofing Systems Canada installs IKO Shingles through-out Western Canada. IKO Shingles in Calgary, Red Deer, Edmonton, Fort McMurray, Lloydminster, Saskatoon, Regina, Medicine Hat, Lethbridge, Canmore, Banff, Cranbrook, Kelowna, Vancouver, Whistler, and points between.

IKO Crowne Slate Shingles Score Big with Consumer Report Reviews
IKO Crowne Slate Shingle has one of the Top 5 – Best Rated  reviews on the Market for 2011

IKO Shingles - Crowne Slate Shingle Reviews
IKO Shingles

IKO Crowne Slate, Owens Corning Berkshire, and the Certainteed Grand Manor all rate in Top 5 in the Consumer Reports annual  reviews. The products that provide the most competition for the IKO Crowne Slate Shingle are: the GAF Grand Slate, the Certainteed Centennial Slate shingle, Certainteed Grand Manor, IKO Royal Estate and in some aspects the Owens Corning Berkshire shingle.

If you can get away from the classic estate look or the 3 tab classic estate look, we would recommend the Malarkey Legacy SBS Modified Shingle. however, in regards to the classic estate shingle reviews, here’s what we’ve discovered this year from the installers in the field  along with what the Consumers Reports has to say.

Roofer’s Review of IKO Shingles

The new IKO Royal Estate is an excellent shingle and consistently receives positive reviews from our installers.

The GAF Grand Slate , Certainteed Centennial Slate and the Owens Corning Berkshire shingle are all exceptional shingles. Yet what stands out this year in reviews from the installers is clearly the IKO Royal Estate Shingle and the IKO Crown Slate Shingle.

Hands down these two shingles are being reviewed by our  replacement installers as the best shingles available for 2011 (classic style or estate profile shingles). This is also agreed upon by Consumer Reports. Our installers most specifically like the no hassle 15 year front end warranty on the IKO Shingles and the SBS Modified Component of shingle such as the IKO Crowne Slate. The GAF Grand Slate is asphalt (a respectable shingle), but not an SBS Modified Shingle like the Crowne Slate or Grandeur Shingle from IKO.

Consumers Reports Rates / Reviews Shingles

The latest available Consumers report has the following reviews available for shingles:

The Certainteed Grand Manor Shingle, Owens Corning Berkshire Shingle, and the IKO Crowne Slate Shingle all rate in the top 5 Shingles Reviewed with  review ratings of 87, 87, 86 respectively.

In the opinion of our shinglers installing the new IKO Royal Estate shingle, they feel  the Royal Estate shingle would receive a high rating as well, yet it was not included in the reviews.

Also missing from the reviews were the Malarkey Legacy shingles. This particular shingle is also a favorite amongst our installers.

So when considering the classic look shingle this year, give the SBS Modified IKO Crowne Slate a look (which is a bold looking shingle) or the IKO Royal Estate shingle, and if you would like to stray away from the classic look, take a look at the Malarkey Legacy SBS Modified shingle.

For more information on roof shingles, reviews or how to install shingles , take a few moments to review to documents below. Another great search tool to gain some information regarding shingles would be to search our roofing blog (top right corner of page. And as always there is plenty of information on our main website.
Other GRS Roof Repair and Roof Replacement Links and Documents

Roof Repair Page on Web Site

Choosing a Roofing Contractor for your Roof Replacement

What Makes our Roof Installers Different – Lifetime Workmanship Guarantee


Until next time,

The Team at GRS

About General Roofing Systems Canada

General Roofing Systems Canada (GRS) is a Comprehensive Roofing Contractor Installing Shingles through-out BC, Alberta, and Saskatchewan. Shingles Installers in Calgary, Red Deer, Edmonton, Fort McMurray, Lloydminster, Saskatoon, Regina, Medicine Hat, Lethbridge, Canmore, Cranbrook, Banff, Kelowna, Vancouver, Whistler, and points between.

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

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