Shingle roof repair in Toronto
There are shingles and roofing material that are better or worse rated for wind and/or hail. There are a series of tests performed that determine a rating for each type of test.
Specific to hail ratings:
“For instance, a standard wood-shake shingle, because of its susceptibility to hail damage, may receive a Class-1 UL rating, while a polymer-modified asphalt shingle or concrete tile may receive a Class-4 rating.” Source: Insurance Canada – http://www.insurance-canada.ca/claims/other/IENGAHail407.php
In the site report below the shingles appear to be IKO Cambridge shingles. If they are not in fact Cambridge it really doesn’t change the outcome of the report.
But for the sake of the IKO Cambridge shingle being one of the most often used shingles in Alberta we may as well take a look at its wind ratings.
IKO Cambridge shingles have the following wind ratings (which actually has surprised the writer researching this fact):
“Fan-Induced Method”. ASTM D3161- Class F. The IKO Cambridge is a shingle that passes a test velocity of 100 mph (the highest tested) per below.
“ASTM D3161, “Standard Test Method for Wind-Resistance of Asphalt Shingles (Fan-Induced Method),” applies to self-sealing and mechanically interlocking asphalt shingles. During testing, test assemblies constructed according to shingle manufacturers’ installation instructions are subjected to fan-induced winds of specific velocities for specified durations. Based on the test results, shingles are classified as Class A when the test assembly passes a test wind velocity of 60 mph, Class D when the test assembly passes a test velocity of 90 mph and Class F when the test assembly passes a test velocity of 110 mph. UL 997, “Wind Resistance of Prepared Roof Covering Materials,” provides a similar test method and the same shingle wind-uplift resistance classifications.” Source: http://www.nrca.net/roofing/ASTM-International-s-roofing-and-waterproofing-related-test-methods-254
“Uplift Forces / Uplift Resistance Method”. ASTM D7158 – Class H. The IKO Cambridge is a shingle that passes the uplift of 150 mph (the highest tested) per below.
“ASTM D7158, “Standard Test Method for Wind Resistance of Sealed Asphalt Shingles (Uplift Forces/Uplift Resistance Method),” applies to sealant-bonded shingles. This standard provides a testing and calculation procedure that produces a wind-speed-based classification rating for asphalt shingles. This standard extends the wind resistance rating system originally employed in ASTM D3161 to higher wind speeds. The resulting wind resistance rating system is summarized in the table.” Source: http://www.nrca.net/roofing/ASTM-International-s-roofing-and-waterproofing-related-test-methods-254
|Wind Speed||UL 997 or ASTM D3161||ASTM D7158|
|60 mph||Class A||—|
|90 mph||Class D||Class D|
|110 mph||Class F||—|
|120 mph||—||Class G|
|150 mph||—||Class H|
So, if this roof did in fact have IKO Cambridge installed (assuming the installation of the shingle roof was sound) then the wind must have been considerable to cause the kind of damage exhibited in the site report and needed a roof repair. Also for consideration is the fact that it is a steep slope roof and steep slope roofing is more apt to rip off in a storm than low slope. And also I suppose to consider is that the house is in an acreage open area type of area. If anyone reading this can identify the shingle I would be interested in knowing also.
Here’s the report from our journeyman sloped roofer that attended.
October 3, 2014: Crew Arrives For Hourly Dispatch Repair.