Jc Norris
My question is on the 1x4 boards, do they need to be pressure treated or bare lumber. If so my concern is will the chemical used to treat the wood hurt the metal? Thanks
David Stermer
JC, Thanks for the question about metal roofing. Some pressure treated lumber represents a concern when installed in contact with a steel panel. ACQ treated lumber contains copper which is very corrosive to steel. Other pressure treated lumber such as SBX which contains Borate is not corrosive to steel. So, it really depends on the chemicals included in the pressure treatment. Regards, David Stermer
Eric Novotny
An informed customer is the Best Customer!
+1 Depends on the lumber used and the reactivity with the metal. Most strapping applications do not require PT lumber and you are much more likely to get a truer and more dimensionally correct piece of lumber in a non-PT variant.

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