Polystyrene Insulation Roof Rafters

Also called styrofoam insulation this is the least expensive material.

Polystyrene insulation roof rafters.

One common use of extruded polystyrene foam board is for foundation insulation panels. Feature excellent break resistance and lightweight rigidity for ease of installation. 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. 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.

Its versatility is the key to its popularity whether being used to achieve. Fit 24 rafters or snap in half for 16 or 12 rafter spacing. It provides r values that range from 3 6 to 4 2 per inch. An efficient room in a roof in a new build property where over rafter insulation is not desirable.

This is an even more dense and more expensive foam board insulation. Some products have reinforced facing to make them sturdier. Are made of extruded polystyrene foam so they ll stay in place over time and will not rot or deteriorate. Arguably the most popular pitched roof solution installing insulation between and under the rafters uses the depth of the structural timbers to best effect.

The insulation is installed under the roof in the slope. It provides an r value of 6 per inch of thickness and often comes foil faced to help reflect radiant heat.