Roof Rafter Insulation Boards

The later is used in new construction as the interior board serves as an inner wall.

Roof rafter insulation boards.

Install underlay above the rafters. 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. Being lightweight they do not impose significant additional loads on existing structures. Some types of thicker foam board insulation are available but they may need to be special ordered.

Baffles are also called wind baffles venting chutes rafter vents or insulation baffles. But a space needs to be a space or what is the point. Measure the space between the rafters where the insulation. It took us many millennia to get out of caves.

Rigid foam board is just above the roof deck or an exterior insulation option. Your rigid boards will need to be cut to fit the gaps between the rafters. Our insulation solutions for warm roofs maximise both space and thermal efficiency whilst also contributing to acoustic performance. Once up at roof level the between rafter boards can be cut accurately to fit the rafter spacings.

When they are cut ensure there is a. 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. Insulation is friction fitted between rafters with the option to underline the rafters with a layer of thermal laminate to further enhance thermal performance.

Again make sure you select the right thickness of the material so you fill as much of the rafter gap as possible. Insulating the roof above the rafters is known as warm roof insulation as the rafters are brought into the insulated envelope of the building. Bare foam board one sided sheathing board or double sided which is also reference as structural insulated panels. 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.

Yes skylights went in. Photograph 1 above left. Yes they are big thermal holes. For a ventilated roof fix battens on the inside of the rafters 50mm from the underlay to leave vented air spaces.

Original roof uninsulated rafter framing with board roof deck. It comes in standard size 4 8 sheets and smaller sizes in many different thicknesses from 1 4 inch to 2 inches. Celotex polyisocyanurate pir foam insulation boards are easy to cut and handle. For an un ventilated roof construction a vapour open underlay or breather.

Furring straightens out rafter plane for smooth plaster finish. Typically made from polyvinyl.