Radiant Floor Heating - Astro-Foil under-floor insulation Because Astro-Foil is also impervious to moisture and air currents, it is an ideal convection and vapor barrier. Astro-Foil's surfaces reflect heat in both directions to keep you warmer in winter and cooler in summer. Tested R-Values: 15 (Down), 7.31 (Horizontal), 5.4 (Up) E-mail Eagle Mountain for more product info and pricing.
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Astro-Foil reflective insulation consists of two layers of aluminum foil laminated to the outside of heavy-duty polyethylene air-bubble cushioning. These bubbles form trapped air spaces between the foil surfaces to give the structure excellent R values. 
