Polystyrene Insulation Roof Rafters

It provides r values that range from 3 6 to 4 2 per inch.

Polystyrene insulation roof rafters.

Fit 24 rafters or snap in half for 16 or 12 rafter spacing. 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. This is an even more dense and more expensive foam board insulation.

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. An efficient room in a roof in a new build property where over rafter insulation is not desirable. You can use batts polystyrene slabs expanded polystyrene or spray foam to insulate your roof or loft space. It provides an r value of 6 per inch of thickness and often comes foil faced to help reflect radiant heat.

The general advice we give is that you should always insulate between and above the rafters or between and under the rafters on our u value calculator we don t give an option for putting insulation between the 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. Its versatility is the key to its popularity whether being used to achieve.

Also called styrofoam insulation this is the least expensive material. The insulation is installed under the roof in the slope.