Plywood issue

I roofed this house late last summer. It is right around the corner from my house and I drive by it everyday. We replaced about 8-9 sheets of plywood during the course of the job. It was 3/8" plywood on 24" centered trusses. Within the last month I noti>>>

I have used 7/16 , which is what we all refer to as 1/2 nowadays, on replacement of 3/8 before. If you shim the 3/8 around the 7/16 with the thickness of a shingle it will look all the same and give the customer more bang for his or her buck at the same t>>>

so if you replace a couple sheets on a roof that's 3/8 you don't match the existing?>>>

Another vote here for the characteristics of southern yellow pine. Lousy product, IMHO. Any sheeting replaced goes with 4-5 ply CDX, at least 1/2". Just because there are millions of sq ft installed doesn't mean there are not as yet undiscovered issu>>>

Wow, yea lots of plywood sucks nowadays. It may be an issue with the venting under the roof. Is there a possibility of moisture building up in the attic on the underside of the sheathing?, that usually starts in the cold months with attics that are not ve>>>

I have never seen it get that bad, but it is a general characteristic of yellow pine. RRD, you wood be better off to buy 3/8 AC exterior grade, it is a fir product , and considerably higher in price than CDX , but worth it. It used to be used in underside>>>

The attic ventilation is adaquate, ridge vent and several 8x16 soffits. The insulation is better than most in the area. It has fiberglass batts that were, I think placed over loose fill, and there is likely NO vapor barrier although I can't be sure. But>>>

I had the same issue w / a sheet of 3/8" I put in from Menard's-------on my house!!!

I don't know the technical reason for failure. I'd blame the Big Box myself

Needless to say, 3/8" on 24" centers is a no go since the problem on my house.>>>

Is it possible that some sort of water/vapor generator was below it, and is the underside sufficiently vented.>>>

[quote]Wow! Is that the only one that warped?

so far, but as I mentioned it warped within the last month or so and I have somewhere around 8 more sheets in there.:(>>>

Wow! Is that the only one that warped? That is terrible!>>>

southern yellow pine>>>

Looks like it was for sheeting an Eyebrow Dormer.

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Cut acircle before it finishes and you'll have a nice deep rain barrel.:laugh:

Might explain some of the bulges I see around about here.>>>