Mr Punter

Paslode im350 nail gun, stapler.

The expensive front doors have a similar feel to expensive car doors. Both work fine, but an S class merc has a nicer feel than a Fiat Panda

I am with @Ferdinand. Either a 450mm gap or none at all. You will not normally have any right to have any part of your building on or overhanging neighbouring land without agreement.

500mm sounds really thick. Maybe wait for the spec from the SE.

Can we play guess the price? Me first RRP £4,500 You paid £1,700 Let me know if I am close.

I have a Combimate and it seems OK but not scale free. We are in a moderate hard water area. They are fairly cheap and quite easy to fit. I think they help prevent Coronavirus and bubonic plague too, which is helpful.

Is this what was originally specced and quoted? My favourite would be to take out the concrete, boards and joists. Level the sub base to, say, 320mm below finish level. Blind with 25mm sand. Fit plastic DPM. Lay 100mm concrete. Fit 100mm insulation with additional 25mm wide x 75mm high perimeter strip . Fit UFH manifold. Clip UFH pipes to insulation. Lay 75mm screed. Fit floor finish (20mm allowed for). You will also need to allow for any electrics and other services. You could do a lot of the work yourself. It is fairly unskilled. Leave screed and electrics to others.

It has just struck me that if your neighbour has a 3m invert they must be up the hill from you?

Come up to near the surface with your 90mm pumped pipe and connect to 110mm brown pipe with a bandseal connector and connect this to an inspection chamber at about 600mm invert. From the chamber, go down at 45 degrees, then another to connect to the neighbour.

You would normally have standard gravity drainage with 110mm pipe but this will exit to a pump station - a tank sunk in the ground with 1 or 2 pumps. From there it is in 90mm pressurised pipework until near where it joins to the neighbour, where it will go to gravity again. Whoever did your building regs should be able to do these for you. You pump station supplier should advise on sizing and installation.

If it was me I would consider taking out the suspended floor at the front as well so all is insulated ground bearing. No more rot.

Is this roof, land, percolation or sewage? Most of the calcs for these can be done DIY or from manufacturers.

Agreed with @Thedreamer the top hung ones are a decent compromise. I think they can also be reversed for cleaning.

I think they may have different regs as even single house sites abroad will have a tower crane. Over here the regs make it a bit onerous.

If you need Heras to be dismantled / moved frequently for access etc pay a bit more and get the round topped as the welded top ones just crap themselves.

Break out the concrete. Should not be a huge job. If it is just the area at the back it should only take a day or 2 including disposal. You have spent enough on this that it is not worth cutting corners.

Tesco vouchers used to be good for Pizza Express and ferry crossings back in the olden days

Smack it a bit with a hammer. If it stays on, render over it.

Heating oil! Beware of stuff getting stolen or damaged and bear in mind that any warranty may run from when you take delivery, not when it is commissioned.

If you get a crane in, see if you can get plasterboards loaded out or other bits moved about. Maybe some roof tiles or paving. Your crane firm may suggest someone to act as Appointed Person / Lift Supervisor / Banksman / Slinger, which could be a fair bit cheaper than a Contract Lift. You would still need a couple of people on site to land the loads etc.

On GBF it was often put forward that fuel costs would escalate and insulation costs should be weighed against those inevitable increases. Peak oil and all that.

Need arms like Mr Tickle to open and close the window.

Yes. See https://planningregister.crawley.gov.uk/Planning/Display/CR/2018/0865/PA3 They just did the second floor. It is on the market https://www.rightmove.co.uk/property-for-sale/property-67028349.html Quite odd that they made the flats fairly large. I think they were influenced by the LA planning guidance, but they could have ignored it and had some smaller bedsits.

I quite like the colour of lime in the mortar. I understood it has some 'self healing' properties too. It does make the mortar more expensive and it is nasty to inhale though.

Yes, you can just convert part of the offices. I have seen a scheme like this completed.