Rigid Insulation Roof Sheathing

Polyiso consists of a uniform closed cell polyisocyanurate foam core and provides one of the highest r values per inch of any rigid insulation.

Rigid insulation roof sheathing.

The glass fiber reinforcement contributes to improved fire performance and dimensional stability. Featuring integrated moisture air and thermal protection zip system r sheathing completely reimagines traditional wall assemblies by streamlining exterior water air and thermal management. Box beam gable framing new gable overhang is framed in the form of a box beam hanging off of a new layer of roof plywood roof sheathing cantilevered over the top of the 3 layers of rigid insulation. Foam board sheathing insulation johns manville polyiso foam sheathing insulation boards provide a continuous layer of insulation to reduce thermal bridging and improve energy efficiency.

Rigid insulation is one of the best tools to reduce your energy costs. Rigid insulation layers exterior to existing roof sheathing must provide sufficient thermal insulation r value to control condensation risk see climate specific guidance. Nailbase must be vented in high snow load areas. Thermax sheathing is a non structural rigid board insulation consisting of a glass fiber infused polyisocyanurate foam core laminated between 1 0 mil smooth reflective aluminum facers on both sides.

Rigid foam insulation also known as insulating boards provide high r values. Install it anywhere from the roof to the foundation. The exposed edges of the 3 layers of rigid insulation are to be sealed with another layer of membrane. Rigid insulation provides thermal protection and it can also serve as an air and moisture barrier.

Not only that foam sheathing will soon be mandated by code in some climate zones. They keep your home at a comfortable temperature without the need to crank your heat. The exposed edges of the 3. Zip system r sheathing is the simple all in one structural panel with built in exterior insulation.

The boards are available in several thicknesses and r values. You can even place it under the foundation slab. 1 inch and 2 inch thicknesses are common. Install roofing underlayment flashing and cladding as per best practices.

Installing rigid foam insulation on top of roof sheathing is a great option for commercial buildings and homes with limited space. Many homes in more urban areas or other places with dense populations are opting for this method because they can better optimize space. Exterior rigid foam improves air tightness adds r value reduces the chance of condensation in wall cavities and greatly reduces thermal bridging through studs. Install nailbase for cladding.