How To Insulate A Roof Without Attic

Materials commonly used for the insulation of the roof deck include.

How to insulate a roof without attic.

The space between ceiling of the living space and roof must not trap moisture. To effectively ventilate your roof create a 1 in. Airspace from the soffit to the ridge by installing a continuous air chute in each rafter bay. It must have pathways to dry out.

This material is thin and typically has impressive r values. Box out light fixtures. It creates a breeding ground for mold and mildew and ruins the air trapping pockets that block heat flow. Look for water stains on the roof sheathing or damp or moldy spots on attic joists and existing insulation as a clue to where leaks might be.

Cut and insert 1 or thicker high r foam insulation sheets r 8 per inch against the furring giving a 1 or greater air path between the insulation and the roof deck under the cathedral ceiling. Water is insulation s enemy. This material fills up the gaps around. Nail 1 furring along every rafter side against the roof deck.

A new type of roof sheathing now commonly installed has reflective foil on one side to reduce ir radiation into the house from the hot outer layer of the roof. Staple them directly to the roof decking for better insulating roof rafters. Install rigid foam board into the ceiling. To install the air chutes staple them directly to the roof decking.

Insulating the roof is a priority if the ceilings of your home happen to be part of the roof deck as is the case with cathedral ceilings. This foil is presumably impervious to water vapor. The right way to insulate attics and cathedral ceilings with batts using certain t. A professional can walk you through a few options that could work in these circumstances including.

Install high quality blown insulation into the ceiling. To cut blanket style insulation place the product over a piece of plywood with its paper or foil side down.