Sheathing exposure to rain

last year

We’re doing a renovation where half the house is exposed to an addition. It has been raining on and off for the last 5-6 weeks the sheathing has been exposed with no wrap yet or siding. The roof has been installed and so have windows. We have not found any way but my concern is the extreme heat and wet weather have compromised the plywood sheathing. We have not had sheathing inspection yet but I worry the inspection will not go as deep to look for moisture in the plywood that could spread to a moisture/mold issue years down the road. Any advice? Shouldn’t the house have been wrapped quickly and siding and not this six week lag? How can I make sure we don’t have any moisture issues before proceeding?

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Comments (3)

A Mat
last year
Nobody knows what will happen ”down the road”

Wrapping wet wood is avoided.

Let the wood dry.

There are tests for mold and moisture. Express your concerns to the inspector.
millworkman
last year
Sheathing plywood (exposure 1) can be exposed for a couple months safely. It should be covered but as noted above it needs to mostly dry out now. I would just make sure none of the plywood has delaminated when go to cover it up.
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Joseph Corlett, LLC
last year
"Fact: Tyvek® helps walls dry faster

The unique material science behind Tyvek® allows it to be both water tight and vapor permeable. It’s a breathable, non-perforated, product with microscopic pores that allow moisture vapor to pass through it.

So while it’s highly effective at preventing bulk water intrusion, it’s also permeable, or breathable, to allow any water that does find its way into the wall system to find its way back out again as water vapor. This ability to allow unwanted moisture to escape can allow walls to dry more quickly, to protect against water damage from within. That’s an important added layer of protection vapor barriers can’t provide."

https://www.dupont.com/knowledge/top-3-weather-barrier-myths.html