Rigid Insulation Roof Sheathing

Rigid insulation sheathing is made of a rigid plastic foam that is typically sold in 4 8 or 4 10 foot boards.

Rigid insulation roof sheathing.

Install nailbase for cladding. The exposed edges of the 3 layers of rigid insulation are to be sealed with another layer of membrane. Thermax sheathing is a former product of the dow chemical company. The plywood was fastened through the rigid foam to the rafters with long screws.

Rigid foam insulation also known as insulating boards provide high r values. Rigid insulation is usually the most practical because of its thin profile but it is more expensive than batt insulation. Here you can find overstock discontinued non standard sizes and more. Nailbase must be vented in high snow load areas.

After installing several layers of rigid foam above the roof sheathing these workers installed plywood above the rigid foam. You can even place it under the foundation slab. Rigid insulation layers exterior to existing roof sheathing must provide sufficient thermal insulation r value to control condensation risk see climate specific guidance. The exposed edges of the 3 layers of rigid insulation are no longer exposed.

Install roofing underlayment flashing and cladding as per best practices. 1 inch and 2 inch thicknesses are common. Insulation for an exposed ceiling must be located above the sheathing. Install it anywhere from the roof to the foundation.

Rigid insulation board is available in quantities ranging from individual foam sheathing to bundles to units. This type of insulated roof assembly limits thermal bridging through rafters. 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. 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 insulation is one of the best tools to reduce your energy costs. All rigid insulation meets astm c578 requirements and is offered at a discount. Insulation requirements will vary with climate and with roofing material. Rigid foam insulation packs a lot of r value into a thin package but not all rigid foam performs the same.

The rigid board sheathing has a one inch layer of continuous insulation for maximium wall and worksite efficieny. The glass fiber reinforcement contributes to improved fire performance and dimensional stability. The boards are available in several thicknesses and r values.