HumiGuard^TM ceilings inhibit spread of mold and mildew

Untreated ceiling vs. Armstrong
HumiGuard ceiling with
BioBlock treatment

HumiGuard^TM ceilings not only resist sagging but also inhibit or retard the growth of mold or mildew on their painted surfaces that can result from high humidity conditions.

Controlled laboratory tests have demonstrated the effectiveness of BioBlock^TM application compared with standard, untreated ceilings.  (Mold and mildew resistance- tested pursuant to ASTM D 3273 method*, with performance evaluation based on ASTM G 21 criteria.)

After a 28-day incubation period, a HumiGuard ceiling panel received a rating of 0, signifying no visible mold growth.

The standard "control" ceiling panels received a rating of 4, signifying "heavy growth" on more than 60% of each specimen.

For more information, see:
Prevent Sag; Speed the Construction Process: With Humidity-Resistant Ceiling Systems.

* "Standard Test Method for Resistance to Growth of Mold on the Surface of Interior Coatings in an Environmental Chamber."