What is "ceramic-acrylic"
coating on your Voyager material?
Our ceramic-acrylic coating is a
highly engineered combination of solar-reflective ceramics suspended
in a hybrid emulsion of acrylic-urethane resins in water. This low V.O.C
reflective coating incorporates top quality elastomeric polymers and
How does Red Sky Shelters Voyager
fabric insulate the roof?
The coating on our Voyager
roof fabric has suspended in it tiny ceramic spheres that are so small
they are only slightly thicker than a human hair. These balls are hollow
with a wall thickness of about 1/10 of their diameter. Yet they are
amazingly strong, each one has a compressive strength of over 6000 psi
and can withstand temperatures of 1800 degrees C. Furthermore, they
are both chemically resistant and non-combustible.
Once a ceramic material is hardened,
its electrons are tightly bound within a crystalline structure. This
prevents them from interacting with neighboring electrons and thus exchanging
energy (heat transfer). This inability to exchange energy is what makes
ceramics a good insulator. These ceramic balls can be subjected to hundreds
of degrees of heat and moments later are cool enough to pick up with
your bare fingers.
Furthermore, most all the gas inside
these spheres has been removed to create a vacuum. Physics law states
that nothing can move by conduction (see insulation
explanation page) through a vacuum, for it represents an absence
of matter. In effect we have a miniature thermos bottle (a microscopic
hollow vacuum sphere that resists thermal conductivity).
When applied onto our roof fabric
these ceramic beads nestle together as the water and other vehicles
evaporate creating a tightly packed film of "thermos bottle like"
vacuum cells. These ceramic spheres form a hard yet flexible layer that
provides a thermal barrier reflecting over 80% of the radiant energy
that strikes the Yomes roof. They also offer improved dirt resistance
and protection from harmful UV rays (it is the UV rays that causes things
to degrade in the sun just as it can damage our bodies and skin).
How can Red Sky Shelters offer
darker roof colors that don't absorb a lot of heat?
The secret is in the pigments we
use. To understand how they work we must first understand how light
and solar energy operates:
Light comes in many colors. The
difference in these colors relates to the frequency of light's wavelength.
The reason we perceive different colors is that each object absorbs
all visible light except the light of that color. The light that's being
reflected is the color we see.
White things reflect most all of
visible light while black things absorb most all visible light. As you
probably know, black things (like your driveway or black upholstery)
absorb a lot of heat too, while white things stay cool. In fact, some
dark colored roofing can attain a temperature of 190 degrees F
or more. However, what we see as visible light represents only a small
portion of the energy that comes from the sun. It turns out that most
of the heat is not in the visible light. Black things get hotter because
they are also absorbing infrared radiation. Infrared (meaning "less
than red"-- in frequency) is the invisible part of the spectrum
that we experience mostly as heat.
If we could develop pigments that
reflect infrared radiation regardless of what visible colors they absorb,
surfaces painted with them would stay exceptionally cool. If these same
pigments could also reflect UV, or ultraviolet radiation (meaning "greater
than violet" in frequency), then the roof they cover would be much
longer lasting. And this is in fact what Red Sky Shelters has done.
Actually this was developed by the
military over a decade ago. It has been kept classified, however, in
the past few years (2002) has become available. Red Sky Shelters may
be the first to combine these pigments with the technology of solar-reflective
ceramics. The result is a waterproof, durable and insulating roof covering.