Shingle roof repair in Toronto

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 –

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:  

“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:

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. 

We arrived on-site at 8:43 am. I spoke with the client and he told me that his fire place was leaking and a small ceiling light had a few drops under it as well, which they noticed when they got back from out of town.roof-repair
I went on the roof and examined around the main chimney area, but did not see anything wrong with the flashing. He had mentioned that he had his roof repaired awhile ago due to a wind storm.
When I was on the roof I noticed a lot of face nails from the previous roofer who did the repairs, which was done very poorly. The roofer just face nailed all the shingles that were damaged during that wind storm.
I told the client what I had seen and told him that the flashing looked to be fine. He then let me in the house and then I went and inspected the attic space. I did not see any signs of wet insulation or water marks of any kind.
I asked him if it was leaking during the snow storm we had and he said no, only when we had the blowing rain a week or so ago. So it could of possibly been from the blowing rain getting up and under the chimney stack cap? Or possibly from the repair job they had done. He then asked if I could seal all the face nails, and I said yes.
I teared most of the face nails that I could reach as it was a 12/12 pitch. He had also asked my opinion on if he should get his roof replaced and I told him yes from all that wind damage they got and the poor repair that the other roofer did, but I think they might hold off on that for a bit. I  left the site at 10:05 am.