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“Triplex Crawlspace” Facts & Install Methods for Retrofitting Under Crawlspace Floors

Triplex Crawlspace Insulation is the state-of-the-art Crawlspace Insulation Application. Triplex Crawlspace is a unique insulating product featuring a foam XPE core surrounded by two layers of large, 1”-wide bubbles and three layers of foil. Triplex Crawlspace Insulation is designed to be installed directly under the subfloor in Crawlspaces to prevent moisture and condensation from forming under the subfloor. Installing Triplex Crawlspace Insulation under the subfloor provides the subfloor with a superior vapor & moisture barrier. Triplex Crawlspace Insulation is specially treated to prevent mold and mildew spread. Triplex Crawlspace Insulation is also treated with UV and corrosion protection. Triplex Crawlspace Insulation comes with a lifetime warranty against failure due to delamination or corrosion. Installing Triplex Crawlspace Insulation directly to the subfloor under the crawlspace without an airgap provides a minimal R-Value of 10 for the assembly unit. Attach Triplex Crawlspace Insulation under the floor trusses to achieve higher R-Values. Simply staple Triplex Crawlspace to the bottom of trusses.  Tape and seam the ends, creating a trapped dead-air space. To factor the achieved R-Value, multiply the trapped air space and add an R-Value of R-10 for the material. Example: 6” trusses X 5.5 = R-33 and add R-10 for the Triplex material to achieve an R-Value of R43.  Triplex Crawlspace also adds 97% reflectivity and 3% emissivity to the insulation envelope. This added value is important because radiation can play a larger role than conductivity of energy transfer during winter and summer months. The addition of a radiant barrier can improve the performance of an insulation envelope by 50% based on government EPA studies and should not be ignored. Other considerations: Many cities like New Orleans are beneath sea level, and preventing moisture/condensation under a Crawlspace can provide additional challenges. If an older home is on a pier and beam foundation, the soil under the house could remain wet throughout the year. If you have wet soil under the home, you may need to cover the soil with a plastic water-proof liner because the moist soil is the main source of condensation. In extreme environments, it may be beneficial to add a dehumidifier under the crawlspace to keep the entire assembly dry.

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