The product provides a vapor/moisture barrier, which is a strong contributor to the efficiency of the system. Reflectix® is available in convenient roll sizes which contributes to ease of handling and installation.
Drywall works too, and is pretty much the standard for this sort of thing. You could also use plywood or anything else that can act as an air barrier while still being vapor permeable to allow for some inward drying.
Reflectix® is a safe, easy-to-use, thermal insulating material providing cost-effective, high-efficiency performance for a wide range of applications.
For either a reflective insulation or a radiant barrier, an air space is required on the reflective side of the product. (Most Reflectix® products are reflective (shiny) on both sides.)
Aluminium foil can be used as a vapour barrier and also as a vapour retarder, for example when perforated aluminium foil is used.
An air space must exist on a minimum of one side of the product (always on the reflective side (residential attic – preferably oriented facing down)). Radiant barriers by definition do not require an enclosed air space to provide benefit. This application (radiant barrier) is typically installed in a ventilated attic.
The product provides a vapor/moisture barrier, which is a strong contributor to the efficiency of the system. Reflectix® is available in convenient roll sizes which contributes to ease of handling and installation.
The following website states that Reflectix can withstand temps up to 180* F.
Reflectix® will provide adequate insulating without extra wrapping. Begin at the end of the house by stapling the product to the top of the band board or subfloor. Insert the product half way up into the joist cavity and staple the product edge to the side of the joist.
* vapor barrier or vapor retardant is a material which does not allow water vapor to pass through it. * non5perforated radiant barrier is a vapor retardant (vapor barrier) and if used, it will not allow water vapor to pass through.
No, Tyvek house wrap itself does not have an R-value, which is a measure of thermal resistance or insulation. The purpose of a Tyvek house wrap is not to provide insulation, but to act as an air and moisture barrier. It blocks drafts and moistures, helping your insulation to do its job more effectively.
The product also can be used as an effective vapor retarder. The aluminum facing also reduces radiant heat transfer for added R-value or as a radiant barrier and is available in 1000 square foot rolls 54″ wide.
Because a vapor barrier is a low permeable barrier, it keeps moisture from passing through. This is beneficial to keep moisture away from a dry surface but will trap moisture behind it if installed on a water-damaged concrete wall, causing the wall to fail further.
In Most Cases, Attic Insulation Does Not Need To Provide A Vapor Barrier. The good news is that blown-in insulation should not need a vapor barrier. Blown-in is primarily used on the attic floor, and vapor barriers are not a concern for attics in our climate zone.
2.5 Material Softening Point: In direct contact with the heat source the material shall withstand 180O F and with a 1 inch airspace 240O F.
1 With fiberglass insulation R-values ranging from R-15 to R-19 for two-by-four wall systems, Reflectix appears to be a better insulating material than fiberglass or other thick, dense materials.
if it is hot outside, the reflective part of your foil insulation must face outside. if it is freezing outside, the best orientation of the reflective part is inside. if you press the foil side of the insulation tight up against the wall (foil facing outward), the radiant barrier will not work.
Moisture barriers block both liquid water and water vapor, while vapor barriers focus on blocking water vapor only. Many products do both jobs, but you should know what your barrier is designed to do and pick the right one for your project.
Treated paper or foil used as a vapor retarder typically comes in the form of kraft or foil-faced batt insulation. It is useful in situations where the wall finish has been removed and new exterior wall insulation is being installed, as well as in new builds.
Tyvek® weather barriers and related products, like sealants and flashing tape, are used to help create a building envelope system for homes and commercial buildings. Tyvek® can reduce air and water infiltration to help prevent drafts and water damage.
Cover the crawlspace floor with a single layer of plastic moisture polyethylene vapor barrier. Overlap any seams and tape them with waterproof seam tape. “Make sure you overlap the plastic at least 12 inches,” Church says.
Radiant barriers consist of a highly reflective material, usually aluminum foil, which is applied to one or both sides of a number of substrate materials such as kraft paper, plastic films, cardboard, oriented strand board, and air infiltration barrier material.
Depending on where you live, the vapour barrier will either go on the inner surface of the insulation (if you live in a cold climate) or the outer surface of the insulation (if you live in a hot climate). It's safe to say that a vapour barrier will be needed for almost all projects.