[Greenbuilding] [BULK] Re: roof replacement asphalt versus steel

[Clarke Olsen]

   Some things to consider with preformed roofing:
      A standing seam roof will last long enough to be torn off when the 
building is remodeled.
      Preformed panels can be screwed to 2x purlins @ 2' oc. No deck 
needed!
      If you want a deck, 5/8" plywood has twice the screw holding 
strength of 1/2".
      Using purlins on a 1/2" deck can give you a cooler roof with the 
better holding of the 2x.
Clarke Olsen
Spencertown, NY

On Aug 24, 2007, at 9:11 AM, Lawrence Lile wrote:

> ........Precise screw placement helps too. A  solid base of plywood 
> that will hold
> all the screws, not let some of them hit air and fall loose, would be 
> a good idea.