I started framing for a geenhouse and my neighbor came over and said I can have these 4×20 twin wall poly carb sheets. I was going buy use 4×8 and join them with h channel but free is free and the 4×20 is the exact length of the structure. I was wondering if I can overlap the poly carb like roofing and run them long ways? Eventually I’ll be buying new sheets but for the time being is this ok?
by Ok-Position-8940
2 Comments
Wouldn’t see why not. Alternatively, get a bit more lumber and run it lengthwise @ the 4ft height. Can attach the panels to that for more rigidity.
Edit: I was picturing the walls, but if you’re speaking of the roof, then yeah, the shingle style may be better for water runoff.
One downside is that condensation won’t run out the bottom if the channels are going side to side, but I don’t know how much of a problem that is.