Steve B wrote:
wrote in message
...
On Mon, 12 Sep 2011 12:34:47 -0700, "Bob F"
wrote:

Steve B wrote:
wrote in message
...
On Sun, 11 Sep 2011 01:41:05 -0400, willshak
wrote:

Steve B wrote the following:
Anyone know how much they charge per square foot to come shoot
that liquid
foam onto the underside of a metal roof? The two element foam
that expands
and then hardens. About 1,100 square feet.

Steve



It depends upon the economy where you live. Ask around.
Spraying it between wall studs requires an extra step of sawing
it flush with the face of the studs so that wallboard can be
nailed to the studs. Do you need that step?
AN experienced installer can make the "sawing" a virtually
non-existant step.

I've already thought of that. It will be sprayed vertically onto a
slightly sloped roof, and there will be NO need for trimming.

Sometimes it is hard being smart.


It would be a lot cheaper to lay down 4x8 sheets of extruded styrene
before you
install the metal.

Not if the roof is already there.

One would have to lay out the roof in the configuration to receive
said sheets. Said roof is laid out to receive 30.5" wide sheets, two
at a time. To use said sheets would mean their seams would fall on
nonsupported space.

Their only structural value is their resistance to compression, I would imagine.
The joints could be glued with styrene compatible glue I suppose. Maybe a
roofing company would recommend a different product, but it would certainly
would be worth checking out if you haven'y already installed the metal roof (or
it is easy to remove/reinstall).