How To Build A Vented Vent Insulation Roof

This is my video on how to cure condensation and mould in the home.

How to build a vented vent insulation roof.

Solutions for roofs or ceilings that are hard to vent. 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. Unvented roof assemblies should be insulated either with air impermeable insulation rigid foam or spray polyurethane foam or with a combination of foam and air permeable insulation. If you don t want to use sips or nailbase read this article tolearn the four basic approaches to insulating unvented roof assemblies.

If there are imperfections in the spray foam application the vent provides backup to clear any moisture. It is important that air movement occurs and is not impeded by any framing members of the home. A cold roof assembly can also be created using other types of insulation. A ridge vent is a ventilation strip that is placed along the ridgeline of the home.

Nail 1 furring along every rafter side against the roof deck. Cathedral ceilings built using 2 x 12 roof rafters allow enough space for the fiberglass batt insulation and a 1 5 gap for ventilation. This type of roof assembly is designed so the air can flow up the soffit vent through an insulation baffle pass through the 1 5 gap between the insulation and roof sheathing then exit through a ridge vent. Hip roofs odd roof shapes hot roof designs aka dense packed insulated sloped roofs.

Spray foam is applied to the underside of the vent channel. The 1 1 2 inch vent channel terminates in the vented attic of the building.