Using Styrofoam For Ceiling Roof Insulation

During hot summer days the attic or the roof tends to get so hot and thus heat up the whole interior of the home.

Using styrofoam for ceiling roof insulation.

Foam board the last option that i considered and the one i m using is foil faced polyiso insulation board. In warm climates zones 1 through 4 low density open cell spray foam insulation is the typical choice since it is vapor permeable and will allow drying of the exterior sheathing and roof framing if they happen to get wet via diffusion into the interior of the building. It is available in all different size configurations to accommodate lots of different applications. I m using 2 foam board 2 foil faced polyiso r value is approximately r14 fastened to the bottom of the 2 6 truss chord which leaves a nice 2 1 2 air space.

And should you vent the roof. Styrofoam extruded polystyrene foam insulation sheathings such as styrofoam cavitymate or styrofoam ultra sl insulation provide a coat of continuous insulation over the stud members when properly installed and are treated with durable joint treatments such as great stuff pro gaps cracks or liquidarmor flashing and sealant as an integrated air and water barrier system. To prevent this foam installation sheets can be installed to provide effective insulation from the heat of the sun. The attic roof or ceiling insulation sheets can be installed in the attic under the roof or the ceiling.

This is an even more dense and more expensive foam board insulation. The air space will be continuous down to the soffit vents and. One common use of extruded polystyrene foam board is for foundation insulation panels. This foam board insulation is available with straight or tongue and groove edges to help limit air movement.

Let s start with how much insulation you should install. Press the cut insulation board to fit between the rafters or joists. Is 2 inches of insulation enough. Leave an air gap between the roof sheathing and the board.

Settled r values range up to about 6 5 per inch and when installed properly the foam can be a good air and moisture barrier. Rigid foam insulation also is a smart choice. Align the front of the board with the face of the rafter or joist. Great stuff expanding foam insulation the large gap filler in the black can this can be bought at home improvement stores by the.

Insulating an attic usually means you have a lot of room for insulation and you will need high r value so that is why the cheaper options are more popular blown cellulose or blown fiberglass. Here s what you will need recycled styrofoam foam peanuts or packing material made form styrofoam alot of this stuff its easily found since its thrown away alot.