I have a room around 24 x 11 feet. Half of the floor is conventional floor
boards over 4 x 2 inch joists (1930's). The other half is an extension and
is a concrete slab (1980's). The slab has two central heating copper pipes
(15mm) running through it to supply a radiator. The copper pipe had no
insulation and was embedded directly in the concrete.
I have removed the pipes as I want to insulate them. I would also like to
install a wooden floor in this room (either solid or engineered wood). Does
anyone know how much, and what type of, insulation needs to be put on the
heating pipe? I am worried about it damaging the floor.
Thanks for the advice.
The floor is not yet in place and the old pipes have been removed. They
were buried directly in the slab!
I have tried the 9mm wall thickness Armaflex tubular insulation and this
gave a surface temp of 45 deg C. The 19mm wall thickness gave a surface
temp of 29 deg C. Temperature was measured with two thermocouples, one at
the pipe surface (under the armaflex) and the other at the surface of the
armaflex measured by placing the thermocouple under another thin piece of
armaflex. This may have given an exagerated value.
The thicker insulation clearly gives a lower surface temperature but it
means cutting a 60mm deep chase across the slab. I have no idae how deep
the slab is and how far down the damp membrane is so I am trying to minimise
the chase depth but without risking damaging teh new floor.
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