Rigid Insulation Roof Sheathing

Effective resistance to heat transfer with r values up to r 28.

Rigid insulation roof sheathing.

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. 1 inch and 2 inch thicknesses are common. Rigid insulation board is available in quantities ranging from individual foam sheathing to bundles to units.

The plywood was fastened through the rigid foam to the rafters with long screws. Insulation requirements will vary with climate and with roofing material. Here you can find overstock discontinued non standard sizes and more. Install nailbase for cladding.

You can even place it under the foundation slab. Thermax sheathing is a former product of the dow chemical company. The rigid board sheathing has a one inch layer of continuous insulation for maximium wall and worksite efficieny. This type of insulated roof assembly limits thermal bridging through rafters.

Rigid insulation provides thermal protection and it can also serve as an air and moisture barrier. Insulation for an exposed ceiling must be located above the sheathing. The exposed edges of the 3 layers of rigid insulation are no longer exposed. All rigid insulation meets astm c578 requirements and is offered at a discount.

Rigid insulation is one of the best tools to reduce your energy costs. The boards are available in several thicknesses and r values. Install it anywhere from the roof to the foundation. Rigid insulation layers exterior to existing roof sheathing must provide sufficient thermal insulation r value to control condensation risk see climate specific guidance.

Choose rigid insulation wisely and consider the effect its characteristics will have on the performance of the your project overall product cost and the best way to get the bang for your buck. Rigid foam insulation packs a lot of r value into a thin package but not all rigid foam performs the same. After installing several layers of rigid foam above the roof sheathing these workers installed plywood above the rigid foam. 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.

Rigid insulation sheathing is made of a rigid plastic foam that is typically sold in 4 8 or 4 10 foot boards. The glass fiber reinforcement contributes to improved fire performance and dimensional stability. Install roofing underlayment flashing and cladding as per best practices.