Establish a box with drywall and screws to make a three-inch space across the fixture, then use spray foam along the seams.Produce a barrier around the heater flue to carry back the insulation. Operate a bead of significant-temperature caulk within the pipe, then press a couple of pieces of sheet steel into the caulk and staple them on the joist.

Polystyrene is used to create foam board insulation that has a variable R-price of 3.eight for each inch to 5 for every inch, dependant upon no matter if it’s expanded polystyrene (styrofoam) or extruded polystyrene, which can be identified with the blue or pink shade.What’s the ideal attic insulation? That depends upon your definition of “gr