Product Brochure

12
Conclusion
MemBrain
™
Solves the Air and Moisture Challenges of Mixed-Humid Climates
with MoistureSense
™
Technology
Many in the industry have called for “breathable” walls as a
solution to this problem. A slightly more permeable vapor retarder
could allow for necessary moisture diffusion. Drying could occur
via vapor diffusion in either direction.
MemBrain
™
is the first-to-market and only such technology available. Originally developed, tested and commercialized
in Europe, this vapor retarder looks like polyethylene, but is actually nylon-based, which gives it high tensile strength.

with standard tape and sealing practices, MemBrain helps form a continuous barrier that enhances air tightness,
improving overall comfort.
MemBrain reacts to changes in relative humidity by altering its physical structure. During the winter, when relative
humidity is low, it provides high resistance to vapor penetration from the interior. However, when the relative humidity

facilitates drying of wet building systems.
This “reactive” ability works as follows: In conditions of low relative humidity, MemBrain’s plastic molecules form


nylon molecules. As a result, the nylon acquires pores through which further water molecules can penetrate, and

In summer, when the air is humid, the moisture penetrates through the pores into the building interior, allowing
building materials to dry out. If the relative humidity decreases, the pores close up again, and MemBrain then acts
as a retarder to moisture. In the winter, this retarder protects the building materials behind the MemBrain from
condensation.
LOW HUMIDITY
Remains moisture tight in winter when
humidity in the cavity is low.
HIGH HUMIDITY
Increases permeability in summer to let
moisture escape when needed.