Insulation Over Roof Sheathing

There are three main types of insulating sheathing currently being used in the industry.

Insulation over roof sheathing.

Install rigid insulation board in multiple layers with joints offset vertically and. Apply continuous air control membrane to existing roof sheathing or implement continuous air control at roof sheathing. Over roof insulation the gable overhang has been cut flush with the wall sheathing. Foamular family of products brochure pdf v 1588677951000 7 13 mb.

If the sheathing is boards it s a good place for a self adhered membrane. Request a product sample where to buy contact a rep. Staple plastic or foam baffles to the roof sheathing near the eaves to keep the material away. If plywood or osb sealing the panel edges with acrylic tape over primer or a fluid applied membrane would be good options.

For the same reason insulation shouldn t touch the roof s underside. This type of insulated roof assembly limits thermal bridging through rafters after installing several layers of rigid foam above the roof sheathing. The plywood was fastened through the rigid. Scope remove existing roofing and non adhered underlayment to expose roof sheathing.

Zip system r sheathing is the simple all in one structural panel with built in exterior insulation. It spans the rafters to support the roofing and in the case of panel sheathing such as plywood or osb it acts as a diaphragm with the walls to resist horizontal loads. A roof over a vented unconditioned attic does not need to include any insulation. Also note that a new fully adhered membrane is installed on the original roof deck replacing the one installed 17 years ago is folded down to catch the top edge of the wall water control layer.

The airflow from the soffits to the ridge vent keeps the roof cool and prevents ice dams and the material will block that flow. Xps insulation foamular insulating sheathing is xps insulation is used as sheathing over all exterior walls in wood or metal framing construction to create an effective insulating envelope over the entire structure. Featuring integrated moisture air and thermal protection zip system r sheathing completely reimagines traditional wall assemblies by streamlining exterior water air and thermal management. In addition to the air permeable insulation installed directly below the structural sheathing rigid board or sheet insulation is installed directly above the structural roof sheathing.