Insulation Under The Roof

Water is insulation s enemy.

Insulation under the roof.

The material is compressible and is thus easy to fit and is less likely to cause cracks. The materials used to insulate under the roof include batts of mineral or glass wool insulation held in place by battens of wood attached to and across the rafters alternatively polystyrene. The quest for greater energy efficiency in buildings has led to increasing interest and need for insulation improvements in hvac equipment more airtight construction new materials and assemblies. The insulation boards are best fitted under the roof structure whilst the mineral wool can be inserted between the beams of the roof.

Its versatility is the key to its popularity whether being used to achieve. A vent baffle should be installed between the insulation and the roof decking to maintain the ventilation channel. Look for water stains on the roof sheathing or damp or moldy spots on attic joists and existing insulation as a clue to where leaks might be. Senior engineer manager at icynene john broniek makes the case for the unvented attic assembly and why insulating the underside of the roof makes sense.

You can also add rigid foam insulation under the rafters which adds r value and eliminates thermal bridging through wood rafters. Arguably the most popular pitched roof solution installing insulation between and under the rafters uses the depth of the structural timbers to best effect.