Rigid Foam Roof Insulation Installation

Rigid foam offers tremendous boost to a home or office s r value.

Rigid foam roof insulation installation.

In other words rigid foam can be applied on walls foundations and roofs and works great for both retrofits and new constructions. One of the best benefits of rigid foam insulation is that it offers excellent thermal resistance at around double that of traditional insulation. Install it anywhere from the roof to the foundation. Insulated roof assemblies can be vented or unvented.

Rigid foam insulation installation prepare roof deck. Rigid insulation layers exterior to existing roof sheathing must provide sufficient thermal insulation r value to control condensation risk see climate specific guidance. Use a straight edge knife or utility knife to cut the. The benefits of adding a layer of rigid foam insulation to the exterior of walls and roofs are twofold.

The bottom layer of a single ply membrane roofing system is the roof deck or substrate. 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. Rigid foam insulation offers a thermal resistance between r 5 and r 8 roughly twice that offered by traditional batt insulation. Nail it around the edges with roofing nails.

To install measure the foam insulation panels to the roof s dimensions. The first step with roof installation is to prepare the roof deck by getting rid of all dirt dust and contaminants. 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. Nailbase must be vented in high snow load areas.

Johns manville r panel rigid roof insulation board offers r values of up to r 23 6 providing high thermal efficiency. Install nailbase for cladding. Rigid foam insulation also known as insulating boards provide high r values. The roof deck can be plywood metal concrete or wood planks.

There are lots of different ways to insulate this type of roof but one of the best methods calls for the installation of rigid foam insulation above the roof sheathing. 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. You can even place it under the foundation slab. Rigid insulation is one of the best tools to reduce your energy costs.

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. There are at least two good reasons why this approach makes more sense than installing the insulation under the roof sheathing. Install roofing underlayment flashing and cladding as per best practices.