Timber Frame Roof Insulation

2 x 4 or 2 x 6 rafters are then placed on top of this assembly.

Timber frame roof insulation.

This layer of 2x4s is run over top of all of the timbers in the timberframe. We use timber screws to. Roof insulation ventilation in log and timber frame homes. When the rafters are exposed such as in timber frame houses this technique is not.

The roof can also be framed and insulated using this technique. Normally the insulation is either built up above 2x ceiling roof decking that is installed on top of the trusses or sips structural insulated panels are installed on top of the timbers the range of insulation is dependent on the thickness of the sips or of the built up insulation. That second layer of insulation run vertically is taped off and spary foamed. From breather membranes to plasterboard insulation superstore has the right material for your timber frame building.

Once we are done insulationing it s time to add the first layer of 2x4s. Here two layers of rigid kingspan thermawall insulation are separated by breathable membrane and osb plywood sheathing. There are many options to consider. Sheathing is placed on top of the roof timbers.

Build a box around the timber frame air water seal it and then add exterior insulation to completely cover the box. Plastic or tarpaper is applied on top of the sheathing. Long timber screws are used to tie the 2x4s into the timbers. Eaves and rakes overhangs are then floated on top of the foam resulting in zero thermal bridging.

Finally insulation is added to the wall cavities. In this video we add insulation to the exterior of the cabin roof so we don t have to cover up the timbers and wood sheathing boards. The basic steps for my project were. Timber frame construction is once again increasing in popularity with its many benefits including flexible design sustainability and speed of construction.

If you are building new and can go with 2 8 or 2 10 for your wall or roof you can easily increase the insulation. Roof insulation as well as roof ventilation is a topic that comes up in our daily conversations with our clients. New england is a mecca for log and timber framed homes. In typical lumber frame construction roof insulation is placed between rafters and then covered up with drywall.

Using a 140mm timber stud selected for frame rigidity with 60mm pir insulation between the studs and 60mm pir as an insulation wrap around the outside you can attain a u value of 0 16 w m2k.