Insulate Roof Overhang

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Insulate roof overhang.

Cover the horizontal surface of the overhang as well as the joints where the horizontal surface comes into contact with the air dams. Apply spray foam insulation to the bottom edge of the overhang. Soffit vents are in the under part of the roof overhang. Also note that a new fully adhered membrane is installed on the original roof deck replacing the one installed 17 years ago is folded down to catch the top edge of the wall water control layer.

Install rigid foam insulating sheathing at the underside of the overhang see figures 1 3 4 and 5. Versatile high quality and ready to assemble aluminum patio cover kits for the handy diy homeowner interested in a clean professional looking finished product at a fraction of the cost from a contractor. For the same reason insulation shouldn t touch the roof s underside. Install a transition membrane from the existing wall sheathing onto the face of the overhang insulating sheathing.

Over roof insulation the gable overhang has been cut flush with the wall sheathing. By insulating the way you describe you are essentially making the overhang part of the inside of the building envelope. In cold weather you ll notice a big difference almost immediately. Cover the underside of the cantilever overhang with wood or vinyl material commonly the same material that was.

Repeat this process with each cantilever cavity until the entire area is insulated. Use 1 inch and 2 inch thicknesses to fill it as much as possible then put a piece of drywall in front to protect it from fire. Spray foam will give the best r value for the confined space. The airflow from the soffits to the ridge vent keeps the roof cool and prevents ice dams and the material will block that flow.

Insulating the rest of the overhang the easiest way to insulate an overhang is to fill the gap with pieces of rigid foam from below. So insulate the overhang from below and then insulate from inside the attic space. There is also an attic crawlspace above where you tore down the drywall you can see the t g flooring and there should be an access to get in there. The only time when insulation is installed between rafters is when icynene is used and everything except the attic floor is insulated.

Covering up the soffit vents with loose fill or batts which can happen if you stuff insulation along the eaves is a huge no no. In a way you ve added additional exterior surface area to the structure so more overall area for energy to leak through even if it s insulated.