Roof Rafter Insulation Boards

Baffles are also called wind baffles venting chutes rafter vents or insulation baffles.

Roof rafter insulation boards.

Typically made from polyvinyl. But a space needs to be a space or what is the point. For a ventilated roof fix battens on the inside of the rafters 50mm from the underlay to leave vented air spaces. It took us many millennia to get out of caves.

Being lightweight they do not impose significant additional loads on existing structures. Measure the space between the rafters where the insulation. Furring straightens out rafter plane for smooth plaster finish. Yes skylights went in.

Rigid foam board is just above the roof deck or an exterior insulation option. Yes they are big thermal holes. It typically has 3 variations. Insulation is friction fitted between rafters with the option to underline the rafters with a layer of thermal laminate to further enhance thermal performance.

Insulating the roof above the rafters is known as warm roof insulation as the rafters are brought into the insulated envelope of the building. Baffles provide a channel for air to flow through certain parts of the attic. Depending on the specifics of the roof it may be possible to fully fill the rafter depth or in most cases leave a 25mm or 50mm air gap between the top face of the insulation and the sarking membrane. Rigid polyisocyanurate pir foam insulation boards from celotex are among the most thermally efficient commonly available insulation materials on the market.

Some types of thicker foam board insulation are available but they may need to be special ordered. Install underlay above the rafters. Using rigid boards as opposed to wool is a much more precise. Our insulation solutions for warm roofs maximise both space and thermal efficiency whilst also contributing to acoustic performance.

This over rafter insulation method also reduces thermal bridging giving an airtight continuous layer of high performance insulation and results in a well insulated attic space. Foam board insulation is easy to use and is a great diy way to add some insulation. Once up at roof level the between rafter boards can be cut accurately to fit the rafter spacings. It comes in standard size 4 8 sheets and smaller sizes in many different thicknesses from 1 4 inch to 2 inches.

For an un ventilated roof construction a vapour open underlay or breather. Again make sure you select the right thickness of the material so you fill as much of the rafter gap as possible. Bare foam board one sided sheathing board or double sided which is also reference as structural insulated panels. Photograph 1 above left.

When they are cut ensure there is a. Celotex polyisocyanurate pir foam insulation boards are easy to cut and handle.