I found some PVC/wood fiber composite trim at the orange box that I was hoping to use on the exterior of a ranch as a horizontal band (1×6) around the entire house at mid-height and as frieze board (1×4). The longest continuous run would be about 50′. The product is called Tuf-Board and I assume it’s about the same as Royal Wood or Azek. One of my compatriots reminded me of something that might throw a monkey wrench into my plans, though: thermal expansion.
How much does this stuff expand? Any strategies for installing this stuff to compensate for excess expansion? I had planned to install full 16′ lengths with 45° scarf joints nailed to a 1/2″ plywood backer.
Also, I have heard that one can use PVC pipe cement on this stuff. Really?
Replies
Yes, you can use PVC cement. AZEK has a "special" cement that isn't quite as goopy as regular PVC cement.
I've used lots of AZEK and Permatrim (I don't think it's made anymore), and some NelsTek. The thermal expansion does occur so the two strategies are to try to restrain it with lots of fasteners, or to let it expand with expansion joints etc.
Never used the HD product but if it's similiar to AZEK you can get the fastening specifics from their web site.
Good luck!