Non Vented Roof Insulation

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.

Non vented roof insulation.

Unvented roofs vented roof. Or 6 mm vented airspace should be installed between the roofing and the underlayment. If wood shingles or shakes are used a layer of drainage mat e g. Enhancing roofing material life span by reducing sheathing temperature.

In this case you can learn a lot from foam tech s article vented vs. Worries about the hot roof un vented cathedral ceiling designs how to. Minimum 1 4 in. Removing moisture from roof cavities structural members sheathing and insulation.

How to avoid condensation leaks attic mold insulation mold structural damage to roof framing when roof venting is not possible cathedral roof and knee wall insulation venting air path options in older homes hot roof designs. If you don t want to use sips or nailbase read this article tolearn the four basic approaches to insulating unvented roof assemblies. There are traditionally four main reasons for venting a roof. Control airflow install at least 1 in.

Unvented roofs which provides a detailed explanation of each. Controlling ice damming by keeping the roof cold. Basically the term cold roof refers to a traditional roof or vented roof while hot roof refers to a roof that is not ventilated and which has foam insulation attached directly to the roof sheathing. Unvented roof systems where the insulation and air barrier are applied directly to the underside of the roof deck are common in applications where designers are seeking cost effective and energy efficient roof assemblies.