Hot Roof Foam Insulation

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.

Hot roof foam insulation.

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. 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. Rigid foam board roof insulation there are a couple of scenarios in which it would be recommended that you install insulation in the slopes roof assembly of a home rather than on the attic floor as is so commonly done. 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.

A hot roof will work great in any climate. If you don t want to use sips or nailbase read this article tolearn the four basic approaches to insulating unvented roof assemblies. The benefits of a conditioned attic. Both papers basically came to the same conclusion.

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. Unvented roofs which provides a detailed explanation of each. 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. In this case you can learn a lot from foam tech s article vented vs.

How hot roofs differ from traditional roofs. Which is more expensive. Depends on what you are factoring in all the insulation the coating a roof replacement if needed air sealing new or existing the hot roof will usually run more but it generally doesn t need any ongoing maintenance. In the next section we will discuss the process of installing rigid foam board insulation in the roof deck.

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. This product is suitable for use in wall sheathing applications in new. Moisture from indoors can diffuse through the foam and find the cold roof sheathing where it accumulates and eventually rots the roof.