Cut each sheet to the desired size using a utility knife then fasten it in place using staples or adhesive.
Rigid insulation under metal roof.
You have multiple options when it comes to choosing metal roofing insulation.
Metal roof insulation options.
Foil insulation underlayment is recommended under a metal roof and in most cases the shiny side should be facing up but there s a catch.
Now let s go over your options.
Polyurethane spray foam metal roof insulation.
Avoids nails or screws which could penetrate the metal roof and cause leaks.
Start at the bottom of the roof and place the first piece of rigid foam insulation against the metal flashing starting at the center line.
In order to add moisture barrier under metal roof you can spray the undersides of the roof by using a thick layer of polyurethane spray foam.
Nail it around the edges with roofing nails.
Foil insulation is a radiant barrier and it works by.