Last summer I bought my first house. The shingles were pretty bad so I had them torn off and replaced with 30 year Landmarks (CertainTeed Integrity Roof System). They looked good when they were first put on but now I’m noticing a few areas where the shingles are bulging up a bit. It’s most noticeable along the valleys. Any ideas on what would cause this?
I live in Michigan and we did get a lot of snow last winter. Could this be from ice damns? I never saw a single icicle all winter and I didn’t have any leaks so I didn’t think I had to worry about them.
The bulging is not real bad right now. Is it something I should get fixed right away? Since I don’t know the cause I don’t know if it’s covered under warranty.
Are you sure it’s a problem Jim?
Camera angle makes me think it’s the bulge caused by the closed valley system.
Ehd, the shingles run across the valley from one side about 18" and the opposing shingles go over those for about 18", and are then cut off about 2" from the valley center causing a hump…
Still, it’s worth looking into if you’re concerned.
[quote=“tinner666”]Are you sure it’s a problem Jim?
Camera angle makes me think it’s the bulge caused by the closed valley system.
Ehd, the shingles run across the valley from one side about 18" and the opposing shingles go over those for about 18", and are then cut off about 2" from the valley center causing a hump…
Still, it’s worth looking into if you’re concerned.[/quote]
That and they may have run a row up the valley aswell, essentially giving you 3 layers on the one side of the valley, as opposed to one layer everywhere else.
Thanks for the input everyone. I dug out the paperwork from the roofer and it does say they do closed valleys. I looked at the roof some more today and the bulges are a lot less noticeable from different angles and under different lighting. It may have been like that before the winter without me noticing it.
I plan on having the same roofer out this summer to put in some more ventilation. I’ll ask him for his explanation then.
I’m just glad you aren’t all telling me I screwed up my roof by not clearing the snow off it.
My current homeowner said the exact same thing. He was worried about the sag in the sheathing between his trusses (40 yr old 3/8 plywood). You could really see it with his 40yr old 3-tabs (most were now 2-tabs) on there, and when I got those off, man could you really see the sagging.
3 hours later, some GAF Pewter Grey Timberline and it looked almost as if I just sheeted it. I did the same (California Valley) type valley as is on your house, but with the lighter colour seems to hide it more.
Normal and intentional and it did look like that on the day it was installed.
In the field there is one layer of shingles. In this particular valley there is three layers.
My current homeowner said the exact same thing. He was worried about the sag in the sheathing between his trusses (40 yr old 3/8 plywood). You could really see it with his 40yr old 3-tabs (most were now 2-tabs) on there, and when I got those off, man could you really see the sagging.
3 hours later, some GAF Pewter Grey Timberline and it looked almost as if I just sheeted it. I did the same (California Valley) type valley as is on your house, but with the lighter colour seems to hide it more.[/quote]
