Certainteed Smart Membrain™


R-3035 FSK Roll



Moisture in homes is unavoidable, making moisture in wall cavities nearly inevitable - and dangerous if not properly addressed.  CertainTeed's MemBrain™ Continuous Air Barrier & Smart Vapor Retarder is the industry's most advanced technology to create a better performing home.


In "mixed-climate" parts of the country, where homes heat in the winter and cool in the summer, homes using traditional polyethylene vapor retarders may actually trap moisture in the cavity during the summer - raising the risk of costly moisture and mold issues, structural damage, health consequences and liability.


This patented, revolutionary solution can provide a continuous air barrier along with advanced moisture management in a single product, helping achieve Complete Comfort.  It's another reason why choosing CertainTeed means you're installing much more than trusted high-performance insulation products.You're installing confidence.

LOW Humidity

Remains tight in winter when humidity in the cavity is low to prevent moisture from entering.


HIGH Humidity

Increases permeability in summer to let moisture escape, helping to keep the wall dry.



Lamtec R-3035 FSK (Foil-Scrim-Kraft) product is most commonly used as a facing for duct wrap insulation, but has many other insulation
applications where a general use vapor retarder is needed. It is also a good choice for radiant barrier applications because of its extremely low emissivity. Permeance Test Method ASTM E 96, Procedure A - 0.02 perms.


Lamtec WMP-VR is a PSK (White polypropylene film, fiberglass & polyester scrim, 11# natural kraft) vapor retarder, or facing, primarily used for metal or
pre-engineered buildings. It is a very cost effective metal building facing that has excellent installed appearance. The white film side is installed toward
the interior of the building. Permeance Test Method ASTM E 96, Procedure A - 0.09 perms.


Want more information on Film?

For Homeowners: 866-240-4933

For Contractors: 800-666-8191