The most value-engineered siding furring strips over thick rigid foam... but what width?
Assuming labor is free, I've found that the cheapest furring strips would be 15/32" plywood. It's quite a bit cheaper than 1x4's (less than half the price, close to a third, if ripped to 2.5"), and can be narrower than 3.5" without worrying about splitting like 1x3's or 1x2's would. Also, it just barely meets the 7/16" penetration requirement that James Hardie has.
But how wide should they be? 2.5" seems like a reasonably safe width, but I'm curious if anyone has real-world experience with smaller furring strips, and can comment on how small is too small.
Posted Fri, 04/04/2014 - 20:07
Edited Fri, 04/04/2014 - 20:08
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