Rigid Foam Insulation Exterior Retrofit

Bsc s high r value retrofit techniques for roofs unvented attics describes the use of multiple layers of rigid insulation above the roof deck as a retrofit technique to insulate an attic and bring it into the thermal enclosure. Install two layers of rigid foam with the seams offset. This video series focuses on an exterior retrofit of an old home in massachusetts.

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They begin with a starter piece again attaching it with two screws until the furring strips go on.

Rigid foam insulation exterior retrofit.

Remove existing wall cladding and trim. Tape the seams on the second layer. This will make it easier to weave into exterior wall foam when siding replacement happens. This adds r value but most importantly it seals the air leaks that infiltrate roofs and walls.

With the first layer of a two layer exterior foam retrofit installed calvin and damien turn to the money layer. One of the most effective ways to boost an older home s energy performance is to wrap it in thick foam. Thermalwall ph rigid eps insulation board for insulating the exterior walls of homes the advantages are plenty here panels are between 4 5 inches and 8 inches thick the exterior insulation is continuous and they can be attached with 6 inch 10 screws from 4 to 6 inches long. You may notice that the seams are already taped.

Extend the foam beyond the wall be about 4 5 inches. Insulate the walls of an existing home by removing the existing cladding and installing rigid foam insulating sheathing to upgrade the major building enclosure functions of the wall water control air control vapor control and thermal control as follows. More videos in this series.

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