Polystyrene Insulation Roof Rafters

Are made of extruded polystyrene foam so they ll stay in place over time and will not rot or deteriorate.

Polystyrene insulation roof rafters.

It provides an r value of 6 per inch of thickness and often comes foil faced to help reflect radiant heat. Feature excellent break resistance and lightweight rigidity for ease of installation. It provides r values that range from 3 6 to 4 2 per inch. You can use batts polystyrene slabs expanded polystyrene or spray foam to insulate your roof or loft space.

Arguably the most popular pitched roof solution installing insulation between and under the rafters uses the depth of the structural timbers to best effect. This is an even more dense and more expensive foam board insulation. Choose this option for areas that need a good amount of strength and water resistance. Also called styrofoam insulation this is the least expensive material.

The insulation is installed under the roof in the slope. You should leave the space under the roof tiles free from insulation to give adequate ventilation so that you don t get condensation or water coming through the tiles. An efficient room in a roof in a new build property where over rafter insulation is not desirable. One common use of extruded polystyrene foam board is for foundation insulation panels.

Its versatility is the key to its popularity whether being used to achieve. In this blog post we will be looking at insulating pitched roofs and why putting insulation just between the rafters isn t a viable solution.