In message , Tim Lamb
writes
In message ,
harry writes
On Tuesday, 14 June 2016 11:04:22 UTC+1, Tim Lamb wrote:
Underfloor heating.

Insulation thoughts... the existing ground floor has 25mm Jablite topped
with 22mm chip. Recommendation is to over fit 25mm of pre-grooved
insulation and a further set of flooring: chip + Vinyl or engineered
hardwood.

Downside is loss of height in doorways.

What is the real energy loss in heating a relatively uninsulated floor
slab in a roughly square building? For 24 hour occupation, doesn't it
come down to what is lost at the edges?
--
Tim Lamb

Only a couple of inches makes a big difference in a doorway hieght usagewise.
Is there a damp proof membrane under the floor already?
If not, it needs to be taken up and remedied along with insulation.
Lot of work.

There is an existing membrane.

Simplest is to lay the piping on top of the existing and renew the
floor. This will reduce door openings by 67mm.
Oops! 47mm.


--
Tim Lamb