Under Floor Heating System for Floating Floors
Polyplumb floor heating is ideal for floating floors above existing timber or solid
sub-bases. It incorporates the Polyplumb floating floor panel, which is a high
density polystyrene insulation sheet with pre-formed pipe grooves at 300mm
centres. Each panel includes pipe bending grooves.
| Key Design and Installation Information |
| Maximum heat output |
Approx 70w/m2 (see output table) |
| Recommended design flow temperatures |
60ºC (see output table) |
| Maximum circuit length |
80m (15mm pipe) 100m (18mm pipe) |
| Maximum coverage per circuit |
25·8m2 at 300mm centres (15mm pipe)
30m2 at 300mm centres (18mm pipe) |
| Material Requirements (Approx) |
| Pipe |
3·1m/m2 at 300mm centres |
| Floating floor panel |
1 panel /1.4m2 |
| Single spreader plate |
3 plates/m2 |
Pre-installation requirements
 The sub floor must be swept clean and be free from
mortar residues.
Floating floor panel
The 1200x1200x50mm floating floor panels are laid
over the entire floor area to be heated, ensuring that
the panel grooves are aligned. Panels can be cut to fit
where necessary. A void in the insulation is often
retained around the edge of rooms to allow for
distribution pipes from the room to the manifold.
Heat spreader plates
Single heat spreader plates are then laid in the
pre-grooved insulation. These plates ensure an even
spread of heat across the floor area and clip the pipe
firmly into the panel (pictured top middle).
Pipe
When the floor to be heated is covered by floor panels,
pipe can be installed at the pre-designed centres of
300mm only (pictured top right).
Pipe layout
The maximum circuit length is 80 metres using 15mm
pipe, or 100 metres using 18mm pipe. Pipe should be
laid in the pattern shown opposite.
Floor covering
18mm and 22mm tongue and groove floor boards can
be laid over the under floor central heating system in
the normal manner.
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