Discuss UFH in 1970s bungalow with insulation beneath concrete in the Water Underfloor Heating Advice area at PlumbersForums.net

B

BradRBubbs

Hi, I need some advice on what wet UFH system to get for our renovation of a 1970s 3 bed bungalow. The house had subsidence so in the process of fixing that the floors were dug up and replaced with the following construction: hardcore base, membrane, 150mm insulation, concrete finish. Unfortunately we had no say in this setup so we're stuck with it now. We're left with a 40-50mm gap between the concrete and the base of the front door, which obviously limits what we can do with UFH.

There are of course low-profile retrofit UFH options and we'd have liked to have gone with the Nu-Heat LoPro Max with self levelling compound but that is way too expensive for our budget (double what we want to pay). What are our other options, especially considering our 40-50mm gap, and the 150mm insulation beneath the concrete? I've seen the pre-cut boards that pipes are laid in which have no compound/screed on top, would these work well enough with our floor construction? Or should we go down the normal route with pipes in screed but only have 40mm thickness?

Insulation below a concrete slab means the concrete becomes a part of the thermal mass, so because it has a slow response time would it make sense for the UFH to be run continuously? We'll be installing an air-source heat pump together with insulation above the ceiling and on the outside of the house with a render and/or cladding, so would this help with the response time and/or be sufficient to run continuously or intermittently?

Any help would be really appreciated!
 
Depends you don’t really want to go past 150mm
 

Reply to UFH in 1970s bungalow with insulation beneath concrete in the Water Underfloor Heating Advice area at PlumbersForums.net

Similar plumbing topics

Hello all, I'm would like to extend an existing outside tap to another point in the garden. I'm about to pour a concrete patio and was hoping to...
Replies
6
Views
293
Hello all, I’m replacing a concrete paving slab patio in the back yard. The original patio used 50mm deep concrete slabs on hardcore & sand. I’m...
Replies
6
Views
327
We run a community village hall and have a large kitchen provided for the use of hirers. This includes a Lincat SLR9 gas cooker which I believe is...
Replies
5
Views
562
Every two weeks or so I have to go and top up the system because the hot taps are running cold. Boiler display is flashing 0.6 bar and I fill up...
Replies
2
Views
295
PSxxxxxx
P
  • Question
Ideal Logic 24, Previous problem was that the hot water was only cold or barely warm if the heating was in use. If heating was off and boiler cold...
Replies
2
Views
227
Back
Top
AdBlock Detected

We get it, advertisements are annoying!

Sure, ad-blocking software does a great job at blocking ads, but it also blocks useful features of our website. For the best site experience please disable your AdBlocker.

I've Disabled AdBlock