Roof Rafter Insulation Boards

Rigid polyisocyanurate pir foam insulation boards from celotex are among the most thermally efficient commonly available insulation materials on the market.

Roof rafter insulation boards.

Yes they are big thermal holes. When they are cut ensure there is a. Being lightweight they do not impose significant additional loads on existing structures. Baffles provide a channel for air to flow through certain parts of the attic.

Rigid foam board is just above the roof deck or an exterior insulation option. It typically has 3 variations. Celotex polyisocyanurate pir foam insulation boards are easy to cut and handle. 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. Your rigid boards will need to be cut to fit the gaps between the rafters. Measure the space between the rafters where the insulation. Once up at roof level the between rafter boards can be cut accurately to fit the rafter spacings.

Typically made from polyvinyl. Original roof uninsulated rafter framing with board roof deck. 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.

Our insulation solutions for warm roofs maximise both space and thermal efficiency whilst also contributing to acoustic performance. For a ventilated roof fix battens on the inside of the rafters 50mm from the underlay to leave vented air spaces. Photograph 1 above left. Using rigid boards as opposed to wool is a much more precise.

For an un ventilated roof construction a vapour open underlay or breather. Bare foam board one sided sheathing board or double sided which is also reference as structural insulated panels. It comes in standard size 4 8 sheets and smaller sizes in many different thicknesses from 1 4 inch to 2 inches. Insulation is friction fitted between rafters with the option to underline the rafters with a layer of thermal laminate to further enhance thermal 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. Install underlay above the rafters. Some types of thicker foam board insulation are available but they may need to be special ordered. It took us many millennia to get out of caves.

Yes skylights went in. Insulating the roof above the rafters is known as warm roof insulation as the rafters are brought into the insulated envelope of the building.