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Thread
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Topic: HYDRONIC FLOORS, INSLAB VS UNDERFLOOR INSTALLATION
Author: KIM LAZARE
Date Posted: 3/23/2004 |
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I'm planning a hydronic floor in our new house. I have had opinions given to me on how to install a wood floor with hydronic heating. One opinion was pouring a slab of 2" (aprox.) over the tubing on a 3/4" subfloor (LP20, 16 oc).
the subfloor for the finish woodfloor is
two layers of 1/2" underlayment glued
and screwed. to each other. ('floating"over the slab. This was done to give a solid base for the flooring boards and
to prevent as little movement as possible. the heat flow controlled by valves at the manifold.
The theory is a sound floor, even heat and hopefully economical .
the other idea was under the subfloor to set blocking between "I" joist to support tubing, keeping it away from subfloor and the potential nails coming through subfloor. then a layer of foil faced "bubble wrap" and underneath that the floor insulation. the theory here is the radiant energy will be more
direct , more potentially "radiant' . this
is controlled by the switching on/off of
the boiler based on sensors in and outside of the house.
My question is the operational costs of each design ,the tradeoffs in terms of liveability . I've planned half the floor
area is with wood and remainder in ceramic tile, Terrazo, and concrete.
I live in the Puget Sound area of Washington State. I believe our median wintertime temp is about 40
degrees. This floor is over a 4' crawl
space and is a single story.
thankyou for your help, Kim Lazare
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