To install UFH in the hallway or not?

theonlywayisup

I have found a couple of photos from when the screed was laid in the back utility, you can see what I mean about the pipes being on the insulation but inside the 'slab'. This is in the highest (third level) and is mostly stud walls, but you can get the idea.

TamsinC

That's useful thanks - if we have to dig the concrete slab out we will 'refill' with limecrete and then the pipes will sit on that and be screed on top. If not then the will sit on insulation on the concrete slab and the screed will go on top.

IS that a pic of the change of levels? Where the screed gets very thick?

theonlywayisup

No it's not the change in level area. The screed is the same thickness all over but the top photo makes it look less thick due to the angle and the edge of the screed facing us. I don't have a pic of the screed at the level changes (builder's photos) but if you imagine the screed going up to the level change and the pipes fed underneath the step area (inside the step if you like) back up to the new change in level with screed on top.

lg13mza

I should probably add that we needed to make changes to the existing heating system anyway as we were knocking walls out etc and the boiler was ancient. If the heating system had been fine and didn't require changes we probably wouldn't have gone to the expense. Ours is an overlay system as we have a suspended wooden floor. So if I take floor coverings up we can see the pipes. The rooms are heated so much more evenly and I reckon we use less gas than a conventional radiator system.

TamsinC

lg13mza wrote: »

I should probably add that we needed to make changes to the existing heating system anyway as we were knocking walls out etc and the boiler was ancient. If the heating system had been fine and didn't require changes we probably wouldn't have gone to the expense. Ours is an overlay system as we have a suspended wooden floor. So if I take floor coverings up we can see the pipes. The rooms are heated so much more evenly and I reckon we use less gas than a conventional radiator system.

We are doing a period restoration, and putting in eco heating - so going from LPG to ground source heat pump - we are going to be pulling up floor, exposing stone fireplaces, finding hidden walls etc. Going to be messy. May as well pop in under floor heating as well and the radiator system is over 20 years old and could do with an overhaul anyway. Boiler is not particularly old but LPG is very expensive to run.