Mr Punter

The regs say positive pressure of at least 38mm water gauge for at least 3 minutes. For below ground pipework it is 100mm.

No they sometimes do it, sometimes not. Certainly been around for the last 25 years.

Is it obvious, or have they already sussed it? If not obvious, some blue loo cleaner could help disguise. I am quite surprised that wire wool would case much damage. I also doubt that on the basis she got a full scholarship she is anything other than very clever.

The concrete angle ridge tile with dry ridge fixing system works fine.

It will be so rare that you need any heating in bedrooms if they are upstairs. The heat from our towel rads more than heats the upper floors and our place is fairly standard insulation and airtightness. The cooling could be useful on the odd days when it is really hot and it means you don't need to have the external blinds down all the time and be in the dark on a nice sunny day.

This sounds like it is outside building regs so maybe don't bother. Unless you are in a really exposed location the roof will help hold it together. Use restraint straps on the rafters.

How were the drains?

Are you buying or selling?

Nice job! You could dye the wheels piss yellow to match the feature grout.

600 centres is standard for trusses here. Have you considered using slate hooks instead of nails? No slates rattling in the wind and they seem more secure.

OK. Just wondering, would you recommend the Eclisse pocket door system to others?

I must say that this seems an unconventional way to procure a building.

Yes I think you may want to trim the metal threshold. The lugs on the side of the plate look a bit crap. I guess they were to locate it in the frame, for the benefit of those installers who follow the instructions... If it looks really crap you could maybe get something from a shower that would work, but your glass looks quite thick.

I have never heard of such a tight tolerance. Why the hell would you want to add cement board? Just check that the threshold is completely level, fit the door and fill the gap at the top with plasterboard / mastic or whatever.

I understood this was because there may be future new stormwater sewers and you would have the opportunity of connecting to this separately.

£35 for peace of mind seems pretty good.

No, I am. The OP is not on mains gas either and I earlier commented

I am doing 3 flats and could find no reason or practical way not to fit gas combis.

The RHI would pay out £3,290. I doubt the figures would justify it. Both systems are probably good for 15 years and swapping out a gas boiler is half the cost of ASHP. The electricity would probably cost more than the gas.

Oil boilers can be smelly, dirty and expensive to run, so I can see how a heat pump can compete. Where a property is served with mains gas, which is used in 85% of UK homes, there is no compelling reason for a heat pump.

I think the 826 metric size and 838 imperial are fine.

Well the fittings certainly look posh!

I have 5 amp sockets for bedside lights, with 2 way / intermediate switches either side of the bed. Can't see myself grappling for a phone and launching an app for this.

I would have thought you would lose the flange in the depth of the bedding material - mortar or whatever.

You may need a rim board or blocking between the joists and restraint straps running down the masonry. Did you get the roof designed? These details are normally part of the design.