I worked all day yesterday installing the osb roof sheathing in hopes of getting the roofing felt on before it started raining.
Osb roof sheathing got wet.
Although plywood is usually more expensive than osb plywood is more resistant to moisture damage.
Unfortunately more rain is heading this way for the next four days.
Use a dehumidifier 4.
Houses i built got wet.
The glues used to make osb are water resistant because the manufacturers know that virtually no one can build a home that won t get wet before the roof and siding is applied.
The osb and in fact any wood panels must be allowed to dry completely depending on how wet the panels are this could be a few days before any roofing material is applied to avoid trapping moisture under the roof material that could cause edge swell and buckling.
Under the best circumstances the osb sheathing is delivered to the site installed and covered within a few days.
It poured last night leaving the osb drenched.
Osb is manufactured dry and should be transported stored and ideally installed dry.
For pricing and availability.
If the osb swelling is too serious more than your belt sander can fix install a layer of tongue and groove plywood over the ruined osb.
Installing dry is virtually impossible in rainy climates however brief periods of wetting should not cause decay problems provided osb dries below 16 before the air barrier and cladding are both added.
Here are the four main ways you get wet framing lumber to dry.
And next time specify advantech.
Osb sheathing 15 32 cat ps2 10 osb sheathing application as 4 x 8.
Osb roof sheathing gets rained on all the time up here and roofs are the first cover to go on a framed structure.
I suppose if it was wet and then protected immediately it would still be ok you know no water no rot the damage would all show up soon.
Allowing osb to get wet is not a wonderful idea but its done all the time.
Once the house is dried in and the osb has dried out use a belt sander to take down the swollen edges of the osb.
I have noticed that osb that has ever been wet will discolor and it weakens it a lot as if it had much in structural strength to begin with.
If you live in an especially rainy or humid climate consider using plywood sheathing instead of osb.
15 and 30 felts will breathe.
When the sun shines it dries.
Most of the time there is very little harm and the material doesn t loose strength or any of its integrity.
For pricing and availability.
The underside will breathe.
