Hot Roof Foam Insulation

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.

Hot roof foam insulation. 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. Moisture from indoors can diffuse through the foam and find the cold roof sheathing where it accumulates and eventually rots the roof. A hot roof is one where there is no ventilation required as the insulation is directly attached to the roof sheathing. Unvented roofs which provides a detailed explanation of each.

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. The benefits of a conditioned attic. Open cell spray foam insulation is risky in all climate zones we already know open cell spray foam is risky in cold climates. In the next section we will discuss the process of installing rigid foam board insulation in the roof deck.

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. How hot roofs differ from traditional roofs. Both papers basically came to the same conclusion.

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. 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 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. 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. 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.