In light of the change from “CCA” treated wood to “ACQ” treated lumber should there be a more protective screw used with the installation of Suntuf?
The new guide lines by the manufacturers of the ACQ lumber call for heavily galvanized or stainless steel due to the corrosive nature of the ACQ treatment. The change in the treated lumber chemical is a concern. Manufacturers of ACQ do recommend the use of either stainless steel or hot dipped galvanized fasteners (which Palram’s fasteners are not made from). That said, you have two basic options for using ACQ lumber: 1. Use a comparable fastener made from an ACQ approved material. Make sure that such a fastener uses either a neoprene or EPDM washer and that it is installed persuch a fastener uses either a neoprene or EPDM washer, and that it is installed per Palram’s recommendations. 2. Use Palram’s fasteners. Initial tests with ACQ have shown no adverse effect on our fasteners. This is added to the fact that the fasteners are being used to secure a light weight plastic panel (rather than connect structural members). If you use our fasteners, our 10 year warranty will still apply.
