Hot Roof Foam 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.

Hot roof foam 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. The movement of air into indirect conditioning of an unvented attic is a slow gradual process that will not be noticeable by occupants and typically will not put any strain on the hvac system. Which is more expensive. The term hot roof comes in because the spray foam insulation is being affixed directly to the roof sheathing which removes the need for ventilation.

In the next section we will discuss the process of installing rigid foam board insulation in the roof deck. Both papers basically came to the same conclusion. How hot roofs differ from traditional roofs. Moisture from indoors can diffuse through the foam and find the cold roof sheathing where it accumulates and eventually rots the roof.

This product is suitable for use in wall sheathing applications in new. A hot roof is one where there is no ventilation required as the insulation is directly attached to the roof sheathing. But spray foam insulation used at the underside of the roof deck would need to be covered by a thermal barrier and intumescent coatings are commonly used. Unvented roofs which provides a detailed explanation of each.

Attics typically have an insulated floor and have ventilation. Open cell spray foam insulation is risky in all climate zones we already know open cell spray foam is risky in cold climates. The benefits of a conditioned attic. R matte plus 3 thermasheath 3 is rigid foam plastic thermal insulation r matte plus 3 thermasheath 3 is rigid foam plastic thermal insulation board composed of environmentally sound closed cell polyisocyanurate foam bonded to a durable white matte non glare aluminum facer and a reflective reinforced aluminum facer.

A hot roof will work great in any climate. While some try to do this with fiberglass or cellulose their efforts are for naught and quite simply it is not allowed by any legitimate building code out there. If you don t want to use sips or nailbase read this article tolearn the four basic approaches to insulating unvented roof assemblies.