Everyone who has encountered the theme of heating
floor knows that it needs to be "warmed up". As a thermal insulation often,
use expanded polystyrene with foil. However, here is the question, why is it
needed? In addition, is it necessary at all?
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| Picture 1. Example of laying the floor heating loops |
Immediately
I want to dispel one myth that the foil reflects heat. And it is distributed
only in the right heated room. It is not true!
I
will explain. In heating, there are three main types of heat transfer -
convection, heat conductivity and radiation. The latter method can only work in
a transparent environment. Since there is no interlayer between the foil and
the concrete, it cannot reflect (radiate) the heat.
However,
to give away heat due to heat conduction - yes. Since the coefficient of
thermal conductivity of concrete is much lower than that of aluminum foil, the
latter contributes to rapid warm-up and uniform heat distribution over the area
of the room. To achieve this effect, it is necessary to use aluminum foil
with a thickness of more than 50 microns.
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| Picture 2. Consequences of contact of aluminum foil with screed |
And
all the effectiveness of having a foil - disappears.
Because
it is better to use specialized mats under the warm floor. They have a polymer
coating, a convenient system for fixing pipes, are durable and reliable.
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| Picture 3. Special panels for the "Warm Floor" system |
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