Garage Roof Insulation Between Rafters

Install ventilation baffles into the space between the rafters before you install the insulation usually by stapling into place.

Garage roof insulation between rafters.

If you are constructing an unventilated roof without the use of counter battens space would need to be left for the breathable membrane to drape both of which would impinge on the space available for the. 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. Don t insulate your garage walls and ceiling without insulating the big garage door too.

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. In a warm roof structure the insulation is placed above or above and between rafters in order to avoid heat loss and energy transfer. 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. 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.

You can buy insulation kits for standard metal garage doors or you can cut pieces of rigid foam insulation to fit each door panel section. If your attic is going to be converted into livable space then you will need to insulate the roof rafters.