Though the air in the living space is completely isolated from the system, DELTA®-FL is designed to allow small amounts of water vapor into the room to maintain a healthy humidity level.
The membrane also provides a thermal break that generates instant comfort and warmth for your basement. DELTA®-FL is an inert material. The air-gap membrane has an outstanding compressive strength of > 250 kN/m², is extremely tough and rugged and can withstand heavy loads which allows for any finishing on top of the membrane.
The reduction in head room is minimal and the product is extremely easy and fast to install. DELTA®-FL comes with a 20 year product warranty.
High Density Polyethylene (HDPE)
apprx. 5/16" (8 mm)
apprx. 5,200 psf (250 kN/m²)
Air-gap volume between dimples
apprx. 7,9 l/m²
-22°F to +176°F (-30°C to +80°C)
5' x 65.6' (1.52 m x 20.0 m)
4' x 8' (1.22 m x 2.45 m)
Water permeability (EN ISO 11058)
8 · 10-² m/s
Service life expectancy
Ø25 years (at pH between 4 and 0 and temperature < 25°C).
ØThe membrane should not be exposed to UV light for more than 30 days.