Metal, Membranes, and Roof Shingles for Low-Slope Systems

General Roofing Systems Canada installs IKO shingles throughout Canada. 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.

Edmonton Flat Roofing Repair

When completing low slope re-roofing systems it is important to take into consideration the correct election of material that adheres to the local building codes and material manufacturer’s specifications.
Below we have provided a guideline for low slope shingles, roof membranes of flat roofs, and metal roofing.

Low Slope Roofing Shingles

Serious thought is required when you are considering re-roofing a roof that has a slope that is less than a 4/12 pitch. Malarkey Roofing

For roofing with a 3/12 pitch regular shingles can usually be installed with 2 ply 15 lb roofing felt paper as underlay ( Be sure to check with your specific building code and the shingle manufacturer).

The General Roofing Systems Canada (GRS) specification for how to install roofing shingles is to never use felt paper. We prefer to use Ice & Water protection on eaves, valleys, and around chimney flashing.  In addition to Ice & Water,  we also use a  synthetic roof underlay such as titanium.

A roof that has a 2/12 – 3/12 slope is more tentative and the risk for leaks increases. Some shingle manufacturers such as IKO with the Cambridge shingle will warranty their shingles on a low slope roof for twelve years. Malarkey shingles will honour a 30 year warranty on low-slope roofing.

A roof that is 2/12 or less in slope should have a “flat roof” or traditional “low slope membrane” installed. We like to see any roof that is less than a 4/12 slope get a low slope membrane that is fully adhered, mechanically fastened, or ballasted.

Other information:

IKO Shingles

IKO Low Slope Shingle Bulletin – Installation of Asphalt Shingles on Low Sloped Roofs

IKO Roofing – Applying Asphalt Shingles on Low Slopes (covers 3 tab shingles, eave protection, etc.)

Low Slope Roof Membranes (Flat Roofing)

General Roofing Systems Canada (GRS) Edmonton Flat Roofers

Low slope membranes for flat roofing come in a few categories;

  1. Single Ply Membrane: Single ply membranes come in the form of EPDM (rubber), TPO (Thermal Plastic), or PVC (Poly Vinyl). Single membranes are either fully adhered, mechanically fastened, or ballasted.
  2. Two Ply Membrane: The primary two ply membrane is the SBS Modified Bitumen that can be torched down or cold applied.

  3. Built up Roofing: Built up roofing is another way of describing multi-layer roofing. An example would be the traditional  roofs tops that are commonly referred to as tar and gravel roofs or flat-top tar roofs.

  4. New Built up Roofing: More recently, modern technologies have advanced the built up roof and newer built up flat roof systems. They now utilize environmentally friendly products and modifiers vs. the tar or bitumen that has been more commonly used in tar roof systems. The newer versions of built up roof systems are extremely tough and will outlast almost any other roof. They are VOC free, making them perfect sustainable offerings to low slope roof assemblies. Tough Roof is an example of the modern built up roof systems as is the GRS Liquid Rubber Built up Flat Roof (a four layer voc free engineered liquid rubber flat roof with 800% elasticity and contains environmentally friendly synthetic fabric between layers vs. traditional tar felt paper.

Low Slope Metal Roofing

Roof Coating, Industrial Roof, Metal Roof, Leduc II

Low slope metal roofing (steel roofing, roof cladding, standing seam metal roofing) has been used for decades. This is  primarily used in commercial and  industrial roof settings.

With residential buildings, metal roofing is more typically found on steeper  roofs. GRS installs several of metal roofing systems to Mountain villages such as Whistler, Squamish, Canmore, Banff, Cranbrook, Fernie, etc.  More and more metal panel and metal shingle roof residential installations are growing,yet the greatest volume of metal work being completed is on industrial facilities.

An issue with this type of roofing is that there is no other form of roofing material that expands or contracts as much as the metal roofing does. The seams between the roof panels, the fasteners, roof openings at vents, chimneys, flashings, and skylights are consistently expanding and contracting . Due to this factor metal roofing systems are prone to leaks.
Another issue with the metal roofing systems is condensation.  Many roof leaks in homes or businesses are actually not leaky roofs, they in fact a pooling of water in the ceiling due to condensation.  It is important to deal with any condensation or leak issue before installing a new metal roof.
We are able to solve the problem of metal roof leaks by installing a premium roof membrane under the metal roof system. We use a premium caulking tape at the seams in addition to using hidden fasteners. Now one effective way to solve the potential of leaks or condensation issues is to torch a SBS modified membrane or spray liquid rubber before putting the metal roof on.

For a commercial roof and industrial metal roof that is leaking, typically we would coat the roof with liquid rubber. By doing this it helps to ensure that the roof  will be good for another 10 years or more. Trying to locate metal roof leaks and deal with them in an isolated way can be quite time consuming and unfortunately highly frustrating . For more information Click on the following link to go to our roof coating section of our website.

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.

 

Residential Roof Replacement – Shingles

Below you will find an article consisting of roof replacement options for both shingled roofs and low-slope systems. When considering a shingle roof replacement in Western Canada there are a number of different considerations to make – hopefully this list will help you!

ROOF REPLACEMENT, ROOF SHINGLE TYPES:

3 Tab Shingles
3 Tab Shingles are the traditional looking shingle. The traditional 3 tab shingles now typically have 25 or 30 year warranties. There are, however, laminate shingles now that look like a 3 Tab shingle, and there are designer 3 Tab shingles that are a laminate. The latter are designed for an Estate Home look like the IKO Royal Estate.

Laminate Shingles (Designer Shingles, Luxury Shingles, Textured Shingles)
Laminate shingles have become the standard. The older 3 tab style is no longer on these shingles typically and the laminates may be double or triple layer laminates of asphalt and fiberglass shingle material. One of the heavier laminates we like to use is the Certainteed Presidential TL.

Asphalt Shingles
An Asphalt Shingle is a type of shingle. Asphalt Shingles is a term for what the shingles are made from. Traditionally shingles were mostly made from waste paper saturated with asphalt. On the top of the shingle is an adhesive asphalt with ceramic granules. Nowadays there are asphalt shingles, asphalt mixed with other products, and asphalt modifiers in shingles.

Fiberglass Shingles
Here again, fiberglass shingle is a term for what material the shingle is made from. Fiberglass shingles typically have a base layer mat of fiberglass.

SBS Modified Shingles (Rubber Shingles)
Here again, SBS modified shingle is a term for what material the shingle is made from. The SBS modified shingle in our opinion is the best shingle you can buy, and is better for weathering and impact resistance. One of our favourite SBS modified shingles is the Malarkey Legacy Shingle. Malarkey has taken great strides in excellence with the Legacy shingle.

High Profile Ridge Cap Shingles
High profile capping is a standard upgrade in modern shingle technology. It gives your roof a high profile look at the roof ridge and roof hips as the capping shingles have a textured high profile. If you are doing a shake roof replacement the high profile ridge cap is essential.

One of our favourite Ridge Cap Shingles is the GAF RidGlass – SBS Modified High Profile Ridge Cap.
GAF RidGlass High Profile Cap

Algae Resistant Shingles
Algae resistant shingle granules contain a coating of leechable copper ceramically coated.

Roof Replacement, Roof Shingle Products and Manufacturers

Malarkey Roof Shingles

IKO Roof Shingles

Certainteed Roof Shingles

Owens Corning Roof Shingles

GAF Roof Shingles

ROOF REPLACEMENT – LOW SLOPE ROOF SHINGLES

Building Code for Low Slope Roofing
Before you listen to anyone that says you can install xyz shingles on a low slope roof, be sure to check your local building code. Typically anything less than 3/12 pitch is not allowed. However, we strongly suggest looking at not putting shingles on anything less than a 4/12 pitch roof unless you really take precautions and that requires the right low slope roofer.

Shingle Manufacturer Specifications for Low Slope Roofing
Shingle manufacturers have specifications for what they will allow for low slope shingle applications. In some instances the warranty is affected or void. Be sure to look up the shingle manufacturer spec first, before purchasing the shingles. Sometimes the shingle manufacturer will ask for 2 ply felt, or ice and water membrane on the whole roof, etc. Malarkey shingles is one of our favorites to use for low – slope.

Low Slope Roof Valley Applications
We close valleys if the roof is 3/12 slope or less. For 4/12 slope or more, we encourage open valleys (with a specific way of installing the valleys of course).

See our Homeowner Guide to Roof Replacement – How to Shingle a Roof.

Roof Underlay for Low Slope Roofing
Usually, if a low slope roof application is allowed by local building code and the shingle manufacturer states that you can install their shingles on a low slope, then either 2 ply’s of tar paper will be required or a complete ice and water membrane (peel and stick) will be required.

Alternative Membranes for Low Slope Roofing (Flat Roof Membrane Options)
When the slope is so low that you will have constant aggravations after the roof replacement is complete, it is better to consider a roof membrane designed for low slope roofing. TPO, PVC, EPDM, or a MODIFIED BITUMEN are all sound choices.

Visit Low Slope / Flat Roof Section of our Website.

ROOF REPLACEMENT, ROOF SHINGLE COLOURS

Typically, shingle colours are more limited on the lower end and on the higher end of the shingle line. When you are considering a roof replacement this is an important place to park for a few minutes. The mid line shingles like an IKO Cambridge has many options as those shingles are used in more roof replacements than, say, high-end Presidential TL.

ROOF REPLACEMENT, ROOF SHINGLES THAT HAVE A SHAKE LOOK (TEXTURE, PROFILE)

If your roof replacement is from a shake roof to a shingle roof or you just simply want the textured shake look to your shingles, there are more and more shake appearance shingles available every year.

The Presidential TL is a great example; the Owens Corning Woodcrest Collection, Certainteed Landmark, IKO ArmourShake, and the Malarkey Legacy shingles are also quality examples.

ROOF REPLACEMENT, ROOF SHINGLE WARRANTIES

Most shingle manufacturers now have Limited Lifetime Warranties on most of their shingles and on the front end the shingles will typically have a “no grief” warranty period of 10 years, or, in the case of IKO the warranty on the front end is 15 years.

GENERAL ROOFING SYSTEMS CANADA DOCUMENTS

General Roofing Systems Canada – How to Shingle a Roof Properly.

Choosing a Roofing Contractor for your Roof Replacement.

What Makes our Shingle Roofing Installers Different – Lifetime Workmanship Guarantee.

Project Portfolio and References of Roof Replacements.

Roofing Shingle Section of our Web Site.

Request Shingle Pricing Online – Roof Price Contact Online Form.

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.

Low Slope Roofing: Metal, Shingles

Low Slope Flat Roof & Metal Roof
Low Slope Flat Roof & Metal Roof

General Roofing Systems Canada installed low slope roofing systems throughout Canada. Roof installation; 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.

When re-roofing low slope roofing systems it is important to be sure you are using the right material for the right roof slope, local building code, and roof material manufacturer specification.

Below we provide a guideline for low slope shingles, roof membranes of flat roofs, and metal roofing.

Low Slope Roofing Shingles

Serious consideration is required when you are considering re-roofing a sloped system that is less than a 4/12 pitch.

For roofing with a 3/12 pitch, regular shingles can usually be installed with a two-ply 15 lb. roofing felt paper as underlay.

The GRS specification for installing roofing shingles is to never use felt paper. Instead, we use Ice & Water protector on eaves, valleys, around chimney flashing, etc. and use synthetic roof underlay such as titanium. In this instance (with a 3/12 roof), I would consider seriously using only an Ice & Water membrane versus the two-ply roofing felt. This is especially important around chimney and skylight flashing, and any roof vents, valleys, and openings.

A roof that has a 2/12 – 3/12 slope is more tentative and the risk increases. Some shingle manufacturers such as IKO with the Cambridge shingle will put a 12-year warranty on low slope roofs. Malarkey shingles will honour a 30-year warranty.Malarkey Roofing

A roof that is 2/12 or less in slope should have a “flat roof” or traditional “low slope membrane” installed. We like to see any roof that is less than a 4/12 slope get a low slope membrane that is fully adhered, mechanically fastened, or ballasted.

Other information (PDF):

Malarkey Shingle Installation Guide – Includes Install Instruction for Low Slope 2/12 – 4/12

IKO Low Slope Shingle Bulletin – Installation of Asphalt Shingles on Low Sloped Roofs

IKO Roofing – Applying Asphalt Shingles on Low Slopes (covers 3 tab shingles, eave protection, etc)

IKO Shingles
IKO Shingles

Low Slope Roof Membranes (Flat Roofing)

Low slope membranes for flat roofing come in a few categories:

  1. Single-ply membranes in the form of EPDM (rubber), TPO (thermal plastic), or PVC (polyvinyl chloride). They are either fully adhered, mechanically fastened, or ballasted.
  2. Two-ply membrane, the primary choice being SBS modified bitumen that can be torched down or cold applied.
  3. Built-up roofing (BUR). Another way of describing multilayer roofing. An examples would be the traditional tar and gravel roofs, or flat-top tar roofs.
  4. New BUR. More recently, modern technologies have advanced the built-up roof so that they utilize environmentally friendly products and modifiers versus the tar or bitumen commonly used in tar roof systems. These newer versions are extremely tough, will outlast almost any other roof (in our opinion), and are VOC-free, making them sustainable offerings to low slope roof assemblies. The GRS liquid rubber built-up flat roof is an example of a modern system with 800% elasticity and environmentally-friendly synthetic fabric between layers, as opposed to employing the use of traditional tar felt paper.
  5. Spray Foam Roofing.
Low Slope Roof
Low Slope Roof

Low Slope Metal Roofing

Low slope metal roofing (steel, cladding, standing seam) has been used primarily in industrial and commercial settings for decades.

With residential roofing, metal is more typically found on steeper residential roofs. We install a lot of metal systems at mountains villages like Squanism, Canmore, Banff, Cranbrook, Fernie, etc. We also do a lot of residential metal roof shingle installations in cities like Vancouver, Edmonton, and Calgary. Residential metal panel and shingle installations are growing in popularity, but the greatest volume of metal work is on industrial facilities by far.

Low Slope Metal Roof
Low Slope Metal Roof

At issue with metal roofing is that no other form of roofing material expands or contracts as much as metal does. The seams between roof panels, the fasteners, roof openings at vents, chimneys, flashings, and skylights are expanding and contracting all the time. Ultimately, metal roofing leaks due to this expansion and contraction.

Also, condensation with metal or steel roof systems can be an extremely frustrating situation. Many roof leaks with homes or businesses are actually not leaky roofs. Instead, it is water coming through the ceiling as a result of condensation.

Dealing with the potential leak or condensation issues with metal roofing in advance of installing a new system is key.

We solve the problem of metal roof leaks with installing a premium roof membrane under the metal roof system, using a premium caulking tape at the seams, and installing hidden fasteners. If you really want to solve the potential of leaks or condensation in advance, torch an SBS modified membrane or spray liquid rubber in advance of putting the metal roof on.

For commercial roofing and industrial roofing that already has a metal roof on that is leaking, typically we will coat the roof with liquid rubber and it will be good for another 10 years or more. Trying to locate metal roof leaks and deal with them in an isolated way is not usually a good investment of time. Click here to visit the roof coating section of our website.

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