Mr Punter

The cold tarmac never seems to set but will stick to shoes so it gets tracked through the house.

If you have a lot to buy, get a list together and send it out to several merchants.

The project I am working on at the moment which is about 175m2 has fees and service connections working out at £228/m2, so £40k with nothing much to show for it! The watertight shell was about an additional £850/m2, so £1078/m2 total but with me project managing. It will be the same again to finish it.

It really depends on the loads above, but 140mm high will be a lot stronger. You need to get the engineer or the lintel people to confirm.

You need to push back and tell them that you require a 63mm unmetered supply for sprinkler systems. You can do some tests to establish the rates actually required.

It is well worth double checking the water main as it is a lot easier to have, say a 63mm dedicated fire supply than to mess around with tanks and pumps.

If the information is on the drawings you can just send these out. Lots of bricklayers are labour only. Send out plans, elevations, Structural Engineers drawings and notes, specification and lintel schedule.

I am afraid the ramp to the left looks like it may not comply. It seems to rise at about 150mm over about 1200mm, so about 1 in 8.

110mm is standard and cheap, fittings are easy to come by and easy to clear / rod. Why do you want smaller?

Bear in mind you may have doormats or matwells.

Yes

Could you leave the ceiling till later and fit fluffy from underneath?

I am surprised to see you using timber studs @nod. I thought you were a convert to metal?

I am not keen on 9mm boards. 12 or 15 is better. The cold spots from screws will be non-existent. Use a plasterboard lifter to get the boards in place.

Another vote for temporary stairs. Make sure they are reasonably sturdy.

If it is a party wall you have a right to enclose it on your side and use the party wall as part of your structure. Yes, may need to serve notices if you need to cut into the wall or raise the height, but check very carefully that this is the case before you serve the notices as once the process begins it is difficult to stop. You could suggest a sweetener to the neighbour, such as cash payment, should they consent to the works in the notice. They will also need to be satisfied that the works are fully insured.

Same as any foundation. 100mm shingle bed, then shingle to crown of pipe, backfill with selected dug material or imported fill.

What is the purpose of the proposed membrane? Is it a Nudura standard detail?

Steel frame will probably be the best option. It could be erected with a lorry mounted hiab. Is there decent access?

Why not membrane tight to the walls, then batten?

Sorry to read of this. A section drawing through the wall and roof would help. Is this the only damp spot, or is it elsewhere?

+1

I am not sure if you need to serve notice under the PWA but if you have, the process has started. It is best for you if you both use the same surveyor. The Award will take about 6 weeks. If you have not served notice, you could just go ahead. The neighbour would have to get an injunction at the High Court and may be liable for costs if they were unsuccessful.

Try https://images.reading.gov.uk/2022/11/ID95-Site-Layout-Planning-for-Daylight-and-Sunlight-A-Guide-to-Good-Practice-BRE-2022.pdf

"2.1 The assessment comprised the application of the method given in the Building Research Establishment publication “Site Layout planning for daylight and sunlight. A guide to good practice” Second Edition, P J Littlefair 2011." So it compares existing and proposed daylight and sunlight reaching each window. Sunlight is broken into annual and winter.