Roofing - Damp Plywood

last year

I had my roof replaced due to small leaks coming through on the ceiling and the plywood was getting soft/old. Plywood was found to be damp and all was replaced. I was given the attached photos of the old plywood. I am concerned of any mold growth from the wet plywood / ceiling leaks. I was told they saw no mold but curious what are these dark spots on the wood?

Featured Answer

3onthetree

last year

It's hard to tell what's going on in the pics, but I see batt insulation against sheathing, sloppy baffle installation, and a flex duct in one rafter space. It would indicate a cathedral ceiling.

It would be a good idea to investigate whether you have condensation. This is a risk in cold/hot climates (Zones >3) when you have batt insulation against roof sheathing and inadequate/improper venting, and not enough r value of insulation.

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Comments (7)

A Mat
last year
That is not plywood. The dark spots are from the roofing paper being walked on, when the previous roof was applied and then removed.
PRO
Joseph Corlett, LLC
last year
When the underlayment is made dry by a proper roof repair, any mold must die.
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Sigrid
last year
Mold stains. If black mold gets on something, you'll have a black stain forever. It's even tough to get out with bleach.

Additionally, I see crumbling asphalt shingles. It could be asphalt dust. You should ask you roofer, not us. They were up there. I'd believe them if they saw no mold.
millworkman
last year
last modified: last year
Typical looking reroof. Damp OB sheathing and asphalt ground in now. All good if they told you no mold, and were there even a little bit it would die quickly.
PRO
Ursa-pro
14 days ago
Oof... I'd definitely make sure the surrounding framing and insulation are checked too. If that area stayed damp for a while, mold could already be starting to grow, and spores may spread into places you can't see yet. Hidden moisture often stays trapped long after the visible leak is gone, so I'd want to confirm everything is completely dry before closing it back up.
cat_ky
14 days ago
Since this post is a yr old, I am sure, that any problems have been taken care of by now.