Foil insulation underlayment is recommended under a metal roof, and in most cases, the shiny side should be facing up, but there's a catch.
Which way should r tech insulation face?
The metallic facer on InsulFoam R-TECH may provide additional R-Value if it's facing a dead air space. If there is no dead air space, it doesn't matter which way the metallic side is facing. Placing the metallic facer towards an open-air space may allow the material to act as a radiant barrier.
How do you install aluminum foam insulation?
To install foil insulation, roll it out parallel to the ridge and cut it with a utility knife, starting at the drip edge and working your way up. Overlap seams by about 3 inches. Secure the barrier to the roof deck with staples to prevent it from blowing off until you attach the battens and the roofing.
Can R tech insulation get wet?
There is no thermal drift, so the product is eligible for an Insulfoam 20-Year Thermal Performance Warranty. surface that is virtually impervious to moisture.
Is R tech foam waterproof?
R-Tech FF meets or exceeds the requirements of ASTM C578, Standard Specification for Rigid, Cellular Polystyrene Thermal Insulation. In addition, R-Tech FF has excellent dimensional stability, compressive strength and water resistant properties.