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Thread: Hi from Mississauga, ON
10-02-2013, 06:33 PM #1
Hi from Mississauga, ON
I stumbled on your web site trying to do some research on my roof/attic. I need new shingles, and one contractor said that the roof deck was soft, and I'd likely have to replace 40-50 sheets of plywood due to mold.
My house was built in 1986. Previously re-roofed in 2000. About 1000 Sq. Ft. total attic area. 4 sided roof, 4/12. 7 or 8 soffit inlet ports. 4 roof attic vents. 1 East, 2 south, 1 west. 3/8" plywood near as I can tell. Trusses on 24" centers. Plywood looks normal to me for it's age. I can't see any obviously damp areas. Some nails have some rust stains. Rafters have some brown areas that look like normal aging, but no mold that I can see.
For some reason, I can't upload pictures.
Last edited by John Das; 10-02-2013 at 06:36 PM. Reason: Add Pictures
10-03-2013, 04:01 AM #2
Re: Hi from Mississauga, ON
Twenty-four inch O/C and 3/8 decking are the cause, very common.
Best time to check attic for condensation is on a really cold night. Check attic with strong light and look for frost forming on underside of deck.
Ensure all soffit vents are open, not covered with insulation.
The value of experience is not in seeing much, but in seeing wisely.