Non Vented Roof Insulation

Unvented roofs vented roof.

Non vented roof insulation.

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 roofs which provides a detailed explanation of each. Suggestions for un vented or hard to vent building roof cavities. Controlling ice damming by keeping the roof cold.

Control airflow install at least 1 in. 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. Or 6 mm vented airspace should be installed between the roofing and the underlayment. If you don t want to use sips or nailbase read this article tolearn the four basic approaches to insulating unvented roof assemblies.

In this case you can learn a lot from foam tech s article vented vs. 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 wood shingles or shakes are used a layer of drainage mat e g. There are traditionally four main reasons for venting a roof.

25 mm of ccspf against the underside of the roof deck to prevent air leakage through the roof assembly and to prevent moist indoor. 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.