Insulate Roof Or Above Ceiling In Eaves

In cold climates thin insulation near the eaves contributes to ice dams.

Insulate roof or above ceiling in eaves.

In most of the u s. 2d extend insulation into joist space to reduce air flows. Achieving these r values with cellulose or fiberglass requires at least 11 inches of insulation for r 38 or 14 inches for r 49. You may not be able to see them clearly yourself but you can be sure that your hard earned hot air will.

In finished attic rooms with or without dormer insulate 2a between the studs of knee walls 2b between the studs and rafters of exterior walls and roof 2c and ceilings with cold spaces above. To be truly effective insulated areas must be tied down to the roof itself at the eaves. On a positive note congratulations on having 24 inch eaves. The airflow from the soffits to the ridge vent keeps the roof cool and prevents ice dams and the material will block that flow.

Everywhere but climate zone 1 building codes require the installation of ceiling insulation rated at r 38 or r 49. A warm loft is where you insulate immediately under the roof which means your loft space is warm as well. Staple plastic or foam baffles to the roof sheathing near the eaves to keep the material away. This is the point where the roof meets the walls of the house and it s one place where small gaps and cracks are commonly found.