Guest User
9/8/2004
I have heard it both ways: treated battens resist moisture, but the "new" non-arsenic materials decrease the screw life of the roof. What is standard in a humid climate?
Allan Reid
Dura-Loc Roofing Systems, Inc.
9/8/2004
If you have a product in mind contact the manufacturer and get their recommendations. There are a number of considerations. If you use an aluminum or Galvalume substate that is not coated, it can react with the lumber if it becomes wet. There are many types of screw fasteners available. Obviously the thinner cheaper fasteners will not resist reactions as good as the better ones. Some screws have stailess heads and zinc coated shanks. If in doubt use stainless screws, and make sure that the roof ventilates under the metal which will limit any reactions from moinsture.
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