Fire Retarding Plywood Identification/Problems
Fire Retarding Plywood Identification/Problems
(OP)
Hello,
We are looking at a set of townhomes that is being re-roofed. As the roofer was removing the shingles they noticed the roof sheathing was very soft and aactually broke threw. The sheathing is supposed to be FRT plywood, but I can't seem to find anything on the grade stamp that confirms this. How can I tell if this is FRT plywood? Has anyone else dealt with the problems that were associated with FRT plywood made in the 80's and 90's? Thanks!
We are looking at a set of townhomes that is being re-roofed. As the roofer was removing the shingles they noticed the roof sheathing was very soft and aactually broke threw. The sheathing is supposed to be FRT plywood, but I can't seem to find anything on the grade stamp that confirms this. How can I tell if this is FRT plywood? Has anyone else dealt with the problems that were associated with FRT plywood made in the 80's and 90's? Thanks!






RE: Fire Retarding Plywood Identification/Problems
RE: Fire Retarding Plywood Identification/Problems
Check www.apawood.com or org - can't remember which. I think they have some good articles on this.
Check the underside of the plywood. Might be there.
BTW - if it is FRT - then you might have to replace all of it.
RE: Fire Retarding Plywood Identification/Problems
RE: Fire Retarding Plywood Identification/Problems
RE: Fire Retarding Plywood Identification/Problems
Don Phillips
http://worthingtonengineering.com