Shed Roof Insulation Techniques

Use caulk and expanding foam the fire blocking type sealant to close air gaps around pipes ducts and electrical wires where they enter the attic.

Shed roof insulation techniques.

Use the fire blocking type. You can use rigid insulation between the floor joists and use strapping or blocking to hold the insulation in place. Start with clean and dry insulation staple the kraft paper batt to the sides of the studs and cover the insulation with drywall or plywood to keep the insulation relatively dry throughout its life. You can also use closed cell spray foam insulation which also acts as a vapor barrier.

Initially i was going to fit foam board in between the rafters and give no kind of attic or ventilation space but then i was made aware that the roof needs to breathe or else it would sweat and the rafters would rot out. Step 1 install and nail the plywood place the plywood onto the roof of your shed in such a way that it acts as sheathing for the roof s structure. Based on your description marine zone 4 minimum r10 but i would go r20 3 inches and then fill then interior cavity with roxul r23 pressed to the roof deck and then sheetrock it in. Make sure you place the plywood at a right angle to the joists of the roof.

Before installing or adding attic insulation take these steps. Polyurethane closed cell spray foam 7 50 sq. Below is a ranking from highest price to lowest of the various insulation types you can use for your shed. You wrap the shed in the air barrier and then put siding of your choice over it.

We ll take a look at the cost of various insulations using an average of r 13 per square foot. They might be called insulation chutes. Insulation will get moist and attract mold if exposed. In this energy smart homes article senior editor martin holladay explains how to insulate a vented low slope shed roof using a combination of intake vents and cupolas.

They make thin foam pieces that you staple to the inside of the roof sheating before you put the insulation up. I ve also heard that if foam board is tight and sealed properly roof sweating is no issue. Cut and fit strips of 24 gauge sheet metal between the masonry chimney and the surrounding wood framing. Iso rigid foam 1 20 sq.

These foam pieces are as wide as the rafter spacing and form a channel for air to flow between the top of the insulation and the roof sheathing. I would make the shed roof unvented and put poly iso rigid foam on the top of the roof. Because of limited space between the roof sheathing and ceiling joists a low slope shed roof can be difficult to insulate properly. An air barrier is just that it keeps the air outside from getting in and the inside air from getting out.

I m insulating my shed and i have a cathedral ceiling.