I was thinking 4" is pretty wide, but after looking at the specs the 1x4 is like lumber at 3/4 x 3 1/2 and the only smaller one is 1x2, which probably won't cut it. Thanks for the Azek tip, I'll look for it. We don't have a Ganahl out here, but aside from HD/lowes, we do have Dixieline Lumber.