How To Insulate A Truss Roof

If you ended up with scissors trusses without raised heels.

How to insulate a truss roof.

Radiant barrier products can be included to act as vapour and dust barriers and the void created between the roof covering and isoboard can be used for additional insulation. The basic approach to insulating a roof with exposed rafters involves placing insulation on the exterior side of the finish ceiling and covering the insulation with a layer of sheathing. Using panelized roof sections. Why should you insulate exposed roof trusses the finish ceiling option.

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. As to your insulation don t ventilate the attic do use spray foam on the underside of your roof sheathing sealing your attic space. Between roof sheathing and steel roofing you do need to have something. It really doesn t matter if the order was with a professional truss mfgr then the loading will be correct for your particular circumstances.

A variety of insulation materials can be used to insulate scissors truss roofs as long as. Insulation fibers are packaged in bags and blown in place to the desired depth and density using special machinery you can rent from a home center. Typically residential trusses are 16 or 24 inches on center. Specification options as for the isoboard lengths up to 8 000mm are available as well as thicknesses up to 60mm to meet most requirements.

A minimum of 30 felt should be used although synthetic underlayment would be just fine. If you want to keep your exposed roof trusses visible then the easiest way to add some. You may want to investigate a system including a ventilated roof mat as it will reduce thermal heat transmission. In a warm roof structure the insulation is placed above or above and between rafters in order to avoid heat loss and energy transfer.