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So you’re proposing only 4mm of insulation between the pipes and the cold ground?

Any insulation under the concrete?

Not very easy. How much depth is there below the floor? Enough for a small child to crawl around in?

Maybe they imagine that the plastic is supporting the pipe, which will be vulnerable to being yanked if unrestrained.

What was the test result?

They are allegedly problematic, i.e. difficult to get the right humidity threshold.

It’s not an isolator if it doesn’t also disconnect the switched live (so is dangerous?). Perhaps not, though it would probably work. Post some photos.

I have the Evolution one that is currently £60 at Screfix. It’s fine. Very sturdy (heavy); quick to put up (I mainly use it in the garden). The support arms are a bit… imprecise?

No-one knows until you’ve identified what the smell actually is.

ALWAYS CLOSE THE LID BEFORE POSTING PHOTOS OF A LOO.

Please let us know what you end up using. There seem to be a range of products out there. 100 Mbit ethernet over *two* coax cables, without power, should be very easy for a modest range.

Time for another update on this glacially-slow project. Plasterboard fitted, joints and screws filled, and mist-coated around this window. I’ve only done the filling now to find out whether I can do a good-enough job, or whether I should get a pro to come and skim everything for me at the...

No, it’s just that you only notice it near the cold window because that is where it condenses. The humidity is probably spread all around the room. No, not a good idea. Don’t worry about condensation on the window immediately after showering - as long as it’s not remaining there for hours, or...

Yes, that looks right to me.

Ideally, get a recommendation from someone you trust, where you can inspect the work. It is a job where shortcuts can be taken. It is probably a good sign if you will need to wait a few months. If they can come next week, worry. Does it include painting?

Is there a flat downstairs? Are they brewing beer in their airing cupboard?

Well it seems that the two No Nonsense products behave identically in all respects. Thanks Wayners. I’ve been very slow with this first bit, hopefully I’ll learn some tricks and get better with more experience.

180 kWh/day = 7.5 kW = 7500 W. Say mean internal temperature is 17 C. Temperature difference to outside is 18 C. Thermal conductance seems to be 7500 / 18 = 420 W/C. Say 300 m² over 3 floors = 100 m² of roof and floor, and 300 m² of walls (incl. windows). Total surface area = 500 m². So...

Consider leaving the top row of blocks?

No, they are sleeved.