I have heard that if you install T&G over plywood outdoors the wood will rot. I am going to install T&G CVG fir on a covered front porch. The porch has 3/4" plywood installed over 2x8 joist. Why would the wood rot if it is not going to get wet?
Re: porch floor
Your wood will rot due to condensation between the layers.. There would be no air between the
I just redid my front porch with Tand G fir. I had to pull plywood off off the old T and G. There
was alot of rot.
The original porch was built in 1934. Two layers are never any good.
The back porch is Tand G and is original. It is open to the rain etc. There is no rot.
paint stained wretch