"Zz Yzx" wrote in message
...
My shop has a steel roll-up "garage" door that faces a blistering sun
for several hrs/day. I'm determined to insulate it. The easiest way
I see is to slap some styrofoam shhet insulation onto it.

I can get 4' X 8' sheets at Big-Box for a good-enouhg price, but need
to trim the sheets down to ~ 44" X 22" to fit into the recesses of the
door.

What's the best way to cut 1-1/2" or 2" styrofoam sheets? I don't
have a "hot wire" cutting tool.

You say that this is for your shop. Is this a commercial shop that will
likely have fire inspections? Foam insulation is a fire hazard if not
covered by a nonflammable covering like dry wall.

You may be better off in the long term to just replace the door with one
that has insulated panels. They are more expensive by far than putting up
foam insulation but the result is much better.

If foam is the way you want to go, why not have the back of the door sprayed
with foam insulation?