Using Styrofoam For Ceiling Roof Insulation

It is available in all different size configurations to accommodate lots of different applications.

Using styrofoam for ceiling roof insulation.

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. Press the cut insulation board to fit between the rafters or joists. Foam board the last option that i considered and the one i m using is foil faced polyiso insulation board. And should you vent the roof.

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. 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. This foam board insulation is available with straight or tongue and groove edges to help limit air movement. 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.

Is 2 inches of insulation enough. One common use of extruded polystyrene foam board is for foundation insulation panels. So to answer the two remaining questions. Let s start with how much insulation you should install.

Rigid foam insulation also is a smart choice. Leave an air gap between the roof sheathing and the board. The air space will be continuous down to the soffit vents and. The attic roof or ceiling insulation sheets can be installed in the attic under the roof or the ceiling.

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. This is an even more dense and more expensive foam board insulation. That styrofoam insulation will work but it is not cheap per r value however it gives you a great r value per inch. 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.

During hot summer days the attic or the roof tends to get so hot and thus heat up the whole interior of the home. Great stuff expanding foam insulation the large gap filler in the black can this can be bought at home improvement stores by the.