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

Taken from our 2011 archives.

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

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


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

Field Report, June 21 2011:

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

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

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


General Roofing Systems Canada (GRS)

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


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Choosing the Right Roof Ventilation

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

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

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

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

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

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

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


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

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

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

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

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

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

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

Until next time,

The Team at GRS

Miscellaneous General Roofing Documentation

Choosing a Roofing Contractor for your Roof Ventilation Install or Repair

Our Roof Ventilation Guarantee – Lifetime Workmanship Guarantee

Our Roofing Portfolio
General Roofing Systems Canada (GRS)

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


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