PermaCast also significantly reduces field construction costs by eliminating the time-consuming application of layers of mastic and mesh around fittings, waiting for dry-time, and then fabricating a transition to the straight pipe insulation run. These products are designed to be used as moisture and vapor retarders with an insulated piping system. Quick, Easy and reliable.Īdditionally, PermaTherm advocates the use of our proprietary PermaCast TMcoating, (only available on EPS) factory-applied over fittings such as elbows, tees, etc. Seal butt joints between insulation segments with PMZ Tape, which includes an easy strip backing that peels off as you tape.
Additionally, a true vapor barrier is one that completely prevents moisture from passing through its material, as measured by the moisture vapor transmission rate. Polyethylene Sheeting is a durable, stable plastic material commonly used as a vapor barrier (vapor diffusion retarder) in our area. Of course this is done to prevent moisture from spreading and potentially causing water damage. With Moderns Cellulose insulation, a vapor barrier is not. Installation instructions are simple – apply the 3-foot long “ clam-shell” insulation segments over the pipe, and pull off the paper strip that protects the adhesive on the SSL overlap, and press against the lower segment, thus sealing the longitudinal seam. Vapor barriers are installed along, in, or around walls, ceilings, and floors. A common misconception is that vapor barriers are required in all insulation installations. Furthermore, radiant barriers greatly reduce radiant heat gain, which lowers cooling costs. Our methodology advocates the use of our PMZ vapor barrier triple layer vapor barrier (mylar-aluminum-mylar) shop-adhered to the outer insulation surface with a Self-Seal-Lap (SSL) that overlaps the longitudinal seam. Vapor retarder plastic should not be installed over fibrous insulation on basement or crawlspace walls unless rigid foam or spray foam is installed directly. Vapor and radiant barriers protect against water vapers. PermaTherm has developed the most resilient and cost-effective approach to Vapor Barriers available today.
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