Wood screws for Multiwall Polycarbonate
#9 x 1-1/2" screws used to fasten multi-wall polycarbonate sheets to wood base. Includes EPDM sealing washers. Sold 100/per bag.
I just built a 16ft x8 ft greenhouse with wood and polycarbonate sheeting. These screws were excellent at securing the sheeting.
They bite into wood easily and secure polycarbonate strongly without cracking it
Using 16mm triple-wall polycarbonate sheets with the 3/8" rubber spacers as recommended, these screws only go about 1/2" into the wood. I don't feel comfortable with that little so I think I will go out and buy some longer screws on my own.
Good Source for this tape with Competitive pricing on 3M cloth tape.
The screws you receive are much better than the ones pictured. Worked better than expected
My first time with polycarbonate on a greenhouse. That said, these screws are great. They pull the panels down on the wood framing very well and if you're careful they don't crush the panels - be careful. Use slow speed on the drill or use a hand tool to finish the last few turns.
The quality of the screws and washers was quite good. We've had plenty of snow and rain since I used these to install my twinwall, and I have yet to see any leaks.