You don't screw the roofing pans down through the pan, they are all held
down with some kind of clip system; there are no roof penetrations, as
the hold down screws are under the roofing.
Matt T
Troy Harvey wrote:
I'm not talking about seam clamps (i.e. S5!), but rather the problem
of screwing or bolting through the roof causing problems with thermal
expansion. Arguably, clamping to the seams would cause less thermal
expansion problems, since screwing through a panel in the middle of
the roof could cause buckling at the seams, and thus leak?
Troy Harvey
---------------------
Heliocentric
801-453-9434
[email protected]
On Feb 6, 2009, at 11:22 AM, Matt Tritt wrote:
It is my current understanding that some manufacturers of metal
roofing will not warranty their products if clamps are used on the
standing seams. The reason given is that clamping the seams prevents
the normal movement of the roofing during expansion and contraction.
I can't say which company it is, but it's a big one.
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