Under Rafter Roof Insulation

When insulating a pitched roof at rafter level there are a number of key design considerations which will affect the build up of the roof and the choice of insulation.

Under rafter roof insulation. Install underlay above the rafters. In this blog post we explore some of the options available. Its versatility is the key to its popularity whether being used to achieve. Box out light fixtures.

Where the benefits of over rafter insulation want to be enjoyed while still creating a useable room in the roof space it s possible to insulate over and between the rafters. An efficient room in a roof in a new build property where over rafter insulation is not desirable. Joists are the flat horizontal beams at ceiling level and will be the subject of another blog post in the future. But spray foam insulation used at the underside of the roof deck would need to be covered by a thermal barrier and intumescent coatings are commonly used.

These devices allow air to circulate under the roof a necessity for prevention of mold and mildew. For such constructions the principles and benefits of unvented attic construction are similar to that occurring in a single family residence. Https youtu be w4mkphzmqxw contact us restorat. Firstly just to make it clear when we are talking about rafter level we mean the timbers that support the pitched roof.

It creates a breeding ground for mold and mildew and ruins the air trapping pockets that block heat flow. Insulating in and around your roof attic space also prevents long term damage from moisture build up or ice damming which results from the warm air trying to escape through the apex of the roof but instead heating up the snow. Water is insulation s enemy. 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.

Internal restrictions like maintaining sufficient head height can mean that fixing the insulation between and under the rafters is not an option either. Measure the space between the rafters where the insulation. Time to get the insulation finished and get this place warm. Unlike solid insulation products that require careful measurement cutting and fitting spray foam can cover even the most uneven surface instantly.

Arguably the most popular pitched roof solution installing insulation between and under the rafters uses the depth of the structural timbers to best effect. For an un ventilated roof construction a vapour open underlay or breather. Attach the baffles into each rafter bay using a power screwdriver and the screws that come with. Additionally insulation serves as a way to enhance sound proofing on the uppermost envelop of your house.