Roof Rafter Insulation Boards

Our insulation solutions for warm roofs maximise both space and thermal efficiency whilst also contributing to acoustic performance.

Roof rafter insulation boards.

Measure the space between the rafters where the insulation. Rigid foam board is just above the roof deck or an exterior insulation option. It typically has 3 variations. Once up at roof level the between rafter boards can be cut accurately to fit the rafter spacings.

Some types of thicker foam board insulation are available but they may need to be special ordered. Furring straightens out rafter plane for smooth plaster finish. It took us many millennia to get out of caves. Bare foam board one sided sheathing board or double sided which is also reference as structural insulated panels.

Typically made from polyvinyl. Photograph 1 above left. 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. Baffles are also called wind baffles venting chutes rafter vents or insulation baffles.

Baffles provide a channel for air to flow through certain parts of the attic. Rigid polyisocyanurate pir foam insulation boards from celotex are among the most thermally efficient commonly available insulation materials on the market. Foam board insulation is easy to use and is a great diy way to add some insulation. It comes in standard size 4 8 sheets and smaller sizes in many different thicknesses from 1 4 inch to 2 inches.

When they are cut ensure there is a. Being lightweight they do not impose significant additional loads on existing structures. Original roof uninsulated rafter framing with board roof deck. Install underlay above the rafters.

Celotex polyisocyanurate pir foam insulation boards are easy to cut and handle. Yes they are big thermal holes. Yes skylights went in. For an un ventilated roof construction a vapour open underlay or breather.

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. Using rigid boards as opposed to wool is a much more precise. Insulating the roof above the rafters is known as warm roof insulation as the rafters are brought into the insulated envelope of the building. The later is used in new construction as the interior board serves as an inner wall.

But a space needs to be a space or what is the point. Your rigid boards will need to be cut to fit the gaps between the rafters.