to provide greater comfort at a
lower cost, CemteQ
has introduced a new surface-treated perlite for the insulation of cavity
walls. Branded PerlFill, the surface-treated perlite provides a quick and
effective, lightweight, non-flammable insulating fill for cavity walls that is as permanent as the walls that contain it.
product flows easily into all cracks, voids and cavities, providing a very
effective insulation blanket. Placement in new or existing walls requires no
particular training or equipment, making it construction-friendly and
cost-effective, particularly compared to high-density polystyrene board. The
product is either poured directly into the cavity from the bag or using a
hopper to guide the flow and prevent any wastage.
is specially surface-treated to make it more water repellent, ensuring that its
insulation characteristics are maintained. Perlite is chemically inert ensuring
it will not corrode piping
and electrical or communications conduits, is pH neutral, non-toxic and sterile.
It is also vermin-resistant, does not rot, decay or settle and offers excellent
fire protection. As a loose-fill insulator in masonry construction,
perlite completely fills all crevices, cores and mortar areas and will flow
around any roughness, unevenness or exposed installations. It supports its own weight
and will not settle or bridge.
is the world’s largest producer and consumer of perlite, promoting it as a
green building material. Laboratory
tests in the USA on water transmission show that a cavity wall filled with
treated perlite resists transmission of water to the interior wythe.
Performance of the overall wall was rated “excellent” in accordance with
procedures established by the National Bureau of Standards in BMS82. Treated
perlite insulation will not, however, waterproof a poorly constructed masonry
wall and good construction practice should also incorporate the use of suitable
weep holes and weep hole covers.
SANS 8301 tested K-value for PerlFill is 0.04136 W/m.K which gives an R-value
in a 50mm void of 1.21m2.K/W. Subsidence has been tested at
around 0.41% or roughly 10mm on a 2,4m high wall. PerlFill is supplied in 100l
bags and CemteQ can assist with installation in key South African geographies.
is a glass-like rock derived from the lava of under-sea volcanoes. After it is mined, the volcanic rock is ground and
shock-heated to around 900°C, which causes its water content to vaporize and
create the myriad tiny air bubbles and corresponding light weight and good
insulating properties. In
a final step, the granulate is treated with silicone to make it more