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Oaphelp Newest Member · Yesterday at 11:401 day

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Concrete floor levelling & build-up questions

You're on the right track.

The rotten batten is almost certainly an old nailing ground for boarded flooring. Dig out every scrap of timber, check the hole does not go through the structural slab, then slurry the sides with SBR and fill in layers with a repair mortar.

Home made skirting grounds from CLS are fine if you let the timber dry first. 400mm centres into masonry is plenty.

If the old steel pipes are abandoned, cap them and leave them, then break out the loose chasing and repatch. If they are still live, replace any runs you can reach now, because buried steel rusts and expands, which is often what cracked the old patch.

Low expansion foam at the gaps and a silicone dam at the doorway will stop the self levelling escaping. Closed cell perimeter strip is for isolating a floating screed. A bonded levelling compound should stick to the slab, so do not run foam all the way round.

Leaving the bitumen tiles and covering them with a compatible compound such as Ardex NA encapsulates them, so long as you do not sand or grind. Check with the makers whether the liquid DPM goes before or after the compound. 20mm of XPS helps, but if thresholds allow, 50mm would do much more. An 18mm tongued and grooved plywood deck with glued joints and a wall gap is a better base for LVT than chipboard. Check the total height against your doors before you commit.

By JpManning · 2 hours ago2 hr
Kloeber in adminstration - data sheets needed

That's a bu**er! I found this, which says it's a datasheet, but may not be what you need...

https://www.kloeber.co.uk/architect-hub/uberslide-drawings/

By Redbeard · 2 hours ago2 hr
Predictive heating control or monitoring

The predictive heating was switched off soon after starting, had teething problems and to much reliance on the internet, so reference temps would drop etc. it was parked and ran pure WC until I realised the CoP really wasn't that great, it's was ok but not great, but the biggest issue I couldn't get flow temp low enough so was always using more energy than I needed in milder weather.

Tried upping temperature and running less time and eventually settled on a simple fixed 33 Deg flow temperature and ran in Cosy cheap periods, controlled by an on/off thermostat. But that is only good down to about 4 degs. Then the heat pump has to run outside Cosy periods at a fixed flow temperature. CoP over the last 7 days being and temps down to 4 degs has been 5.4.

Could have added a slight WC curve to compensate for reducing temperature, but there's no fun in that.

Looked at a method of control flow temperature. All the modbus directory is open source on a Hiaer heat pump, so have purchased a Waveshare Industrial Serial Server RS485 To RJ45 Ethernet TCP/IP converter for £29. This will be connected to Home Assistant and home assistant mapped, with the required modbus details. Then will have read write control of heat pump.

Then simply map the heat energy required over the past 24 hrs as a rolling score compared to heat delivered and determined if 33 is to hot or not warm enough and via modbus change the flow temp. Will leave the existing thermostat as the gate keeper for timing and overall comfort.

Adds a simple variable flow temp based on energy needs, no internet needed everything via ethernet. Reason using past 24 hours and not future, the floor at 100mm thick and 192m² has plenty of capacity to be a few hours out on the calculations.

By JohnMo · 3 hours ago3 hr
Sourcing windows from Europe

The glass spec is the same, eg solar control and laminated. The screenshot image just does not show it.

The idea of having the bottom part of the window blanked off is interesting, but I think it will detract too much from what we are trying to achieve.

By flanagaj · 3 hours ago3 hr
Insulated suspended concrete floors.

It doesn't go away because it's not resolved.

I value the marmox suggestion, but as I've already mentioned - it seems the manufacturer only approves <12mm thickness for laminate, and I can't find any reports of people successfully laying laminate over it. It's a lot more expensive per sqm than XPS 300, but appears to come with similar risks and less insulation thickness.

In regard to carpets, I appreciate that different people have different hygiene standards - I've once seen a house with a fitted carpet in the toilet - but I'm not considering carpet as a solution. For a couple of adults who always take the shoes off at the front door and spend half their life cleaning their city flat it might be OK. For an outdoorsy family with kids, pets, constant coming in&out of the garden carpets are a health & safety hazard from the amount of dirt that will build up in them.

By tetris · 3 hours ago3 hr

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BuildHub Guide: Information about the site : Introduce Yourself

Build Design, Planning, Finance and Legal

House Construction & Structural Issues

Building Trades

Environmental, Alternative & Green Building Methods

Self Build & DIY: General

Self Build Regional Groups