garyclontz@comcast.com wrote:
In 24 years, I have never seen a home with 1/2" plywood subfloor covered with 3/4" p. board underlayment. Is this common in other parts of our great country? Just wondering!
From central Pennsylvania here and it is very common to find homes with 1/2 inch ply and 5/8 or 3/4 particle board on top. If not then its just a 3/4 t/g ply subfloor. The 1/2 ply with 5/8 particle board was very common building practice in the late 60's through mid 80's. Now its more 3/4 tg plywood. Generally around here the only floors built with only a 3/4 particle board subfloor are the modulars or trailers.
Bill