Rigid Foam Roof Insulation Installation

Install roofing underlayment flashing and cladding as per best practices.

Rigid foam roof insulation installation.

Johns manville r panel rigid roof insulation board offers r values of up to r 23 6 providing high thermal efficiency. The bottom layer of a single ply membrane roofing system is the roof deck or substrate. The first step with roof installation is to prepare the roof deck by getting rid of all dirt dust and contaminants. The benefits of adding a layer of rigid foam insulation to the exterior of walls and roofs are twofold.

Use a straight edge knife or utility knife to cut the. Rigid foam insulation also known as insulating boards provide high r values. Install nailbase for cladding. Rigid foam insulation offers a thermal resistance between r 5 and r 8 roughly twice that offered by traditional batt insulation.

First the foam will increase thermal performance by adding r value and minimizing thermal bridging. Install these panels over wall or ceiling cavities including those filled with existing fiberglass batts to boost the r value and improve home comfort and efficiency. Not only does it provide high r values but foam board insulation is also easy to install lightweight and can be used in any room of your home. Rigid foam insulation installation prepare roof deck.

Rigid foam offers tremendous boost to a home or office s r value. Rigid insulation is one of the best tools to reduce your energy costs. To install measure the foam insulation panels to the roof s dimensions. You can even place it under the foundation slab.

One of the best benefits of rigid foam insulation is that it offers excellent thermal resistance at around double that of traditional insulation. Rigid insulation layers exterior to existing roof sheathing must provide sufficient thermal insulation r value to control condensation risk see climate specific guidance. Insulated roof assemblies can be vented or unvented. In other words rigid foam can be applied on walls foundations and roofs and works great for both retrofits and new constructions.

Nail it around the edges with roofing nails. Install it anywhere from the roof to the foundation. Start at the bottom of the roof and place the first piece of rigid foam insulation against the metal flashing starting at the center line. The roof deck can be plywood metal concrete or wood planks.

R panel is manufactured with a closed cell polyisocyanurate foam core bonded to fiberglass reinforced facers and designed for use over metal nailable and non nailable roof decks with a variety of membrane systems. There are at least two good reasons why this approach makes more sense than installing the insulation under the roof sheathing. Nailbase must be vented in high snow load areas.