I promised a better photo of the underfloor heating pipes:
The latter photo is to show where the pipes
aren't. You don't install them under the lavatory pan, because that is screwed to the floor, and you wouldn't want to risk drilling into the floor near pipes. They are also missing from the area of the stairs, because it is pointless heating the understairs cupboard.
I did a reasonable amount of work on the porch without telling you about it. I laid a course of 2 inch blocks all round, and painted them with the liquid waterproofer. Then I did the 25mm insulation upstands, and the insulation on the floor. This is an inch thinner than in the rest of the house because the floor finish which will be going in there (a floor brick), is an inch thicker than the stone which is going over most of the rest of the downstairs. You may also notice a little loop of underfloor heating pipe. This is a bit naughty, because the porch is outside the insulated envelope of the building, and taking the pipe out there makes the porch fall under Building Regs. It's just a short loop to take the edge of the chill in there, and not intended to warm it properly:
Here is the screed underway. Note the 2x2 set into some screed, used as a temporary guide:
This is what 6 hours work looks like:
With a labourer I could have finished the whole floor in the time, but I don't have one. Frankly, there is as much skill in getting the screed mixed to exactly the right moisture content as there is in leveling it, and I would be loath to let anyone else do that job. So it will take 2 days instead of one. Good news is that my back held out through quite a tough day.