Garage Roof Insulation Between Rafters

In the case of a cold roof structure the insulation is placed between or between and under the rafters or at ceiling joist level and the roof is ventilated by leaving a 50mm gap above the insulation which vents air to the outside.

Garage roof insulation between rafters.

If a ventilated roof is being constructed there is a requirement to have a 50 mm fully ventilated air gap between the insulation and the sarking felt in order to avoid condensation. Keep in mind that the structural metal ribbing of garage doors is an excellent conductor of heat and this typically. In a warm roof structure the insulation is placed above or above and between rafters in order to avoid heat loss and energy transfer. So whether it s a new build project or if you re creating a habitable area when renovating an existing loft space the insulation line will need to be within the pitched sloped part of the roof so insulation will need to be installed between the timber rafters to provide protection to the newly created habitable area from external temperature fluctuations.

Opening vents in the soffit would allow air to flow from the low edge of the roof up along each channel between the rafters and up to your ridge vent. Install ventilation baffles into the space between the rafters before you install the insulation usually by stapling into place. If your attic is going to be converted into livable space then you will need to insulate the roof rafters. Don t insulate your garage walls and ceiling without insulating the big garage door too.

Apply insulation between rafters when finishing an attic into a heated room or when building a cathedral ceiling in the home. Garages built without attics are also prime candidates for insulation.