Swell of OSB with Repeated Wetting
Swell of OSB with Repeated Wetting
(OP)
I am looking for information on Oriented Strand Board swell characteristics as well as nail performance due to wetting. I need to decided what to due with some houses where the OSB shearwalls have water damage.
Thanks
Thanks






RE: Swell of OSB with Repeated Wetting
I like to debate structural engineering theory -- a lot. If I challenge you on something, know that I'm doing so because I respect your opinion enough to either change it or adopt it.
RE: Swell of OSB with Repeated Wetting
Provided you fasten in the patch pieces around the perimeter sufficiently you aren't necessarily required to remove the entire damaged sheet but just the damaged portions.
I would not be trying to determine what extent of capacity is remaining. I've always just assumed once wetted to the point of swelling then the whole sheet is useless.
RE: Swell of OSB with Repeated Wetting
All fasteners are affected by moisture intrusion to OSB...nails, staples, screws. Depending on the level of moisture intrusion, I've seen head corrosion with some section loss, to full shank corrosion with complete section loss.
Our "rule of thumb" is that if the OSB is stained, it gets removed, since the volume changes are not generally recoverable.
RE: Swell of OSB with Repeated Wetting
RE: Swell of OSB with Repeated Wetting
APA-EWS
been awhile since I looked at it, but as I recall, reduction in shear value is significantly more for wet osb
RE: Swell of OSB with Repeated Wetting
Further, any loss of section on the fasteners greatly compromises the shear capacity of the shear wall since the fastener shear controls in this case.