saveasteading

6m is more likely to be stocked at a specialist timber merchant rather than a general BM. Phone around. 8 x 2 are not at every BM anyway. But I think you are over-thinking. This is heavy stuff. I would splice the lhs 4.8 and 3.0 and lift to place. Then the rhs 4.8. Then add the 3.6. Tweak for the best fit you can manage. Structurally any twists won't matter. in fact 2 timberz bolted could be stronger than one very wide timber. Levels for floor and ceiling could be a bit wonky but would with any solution. You will need some clamps and perhaps props. If you want to whack in some screws for control then just do it. That might make the drilling easier.

I disagree. There are diminishing returns, and so I'd say design to the principles but be pragmatic. If the last 2% of performance adds 20% to the cost, stick with 98%.

It's so easy to specify. I don't think planners are generally into such technicalities....eg that levels are easy to control. Even when the height was questioned during planning apps, numbers were not required. Show us a stick on site / show an artists impression.

That sounds rude. Sorry if it reads that way. It's a good question. Keep asking.

It is seldom clear and seldom questioned. I think I had an unhappy neighbour complain to the council once. We are talking 100mm or so. It was very easy to show whatever was needed as long as it isn't a lot. Reference to the origjnal ground makes most sense, and you could choose the highest point, esp as you of course usually build above that. But if you referred to floor level it would be OK. The condition is not about 100mm but any large increase.

It's a newly imagined set of worries. These things don't happen.

Oh yes there are. But very fine and invisible, due to being constructed with care. Reinforcement at mid depth, no added water, covered with polythene.

It looks like an upside down utility paving slab. £4.20 at B & Q

It applies to any slab thickness unless there is lots and lots of mesh, or other bars, carefully detailed and positioned. which will control the cracks to be multiple miniscule ones. I don't think I have ever been involved in concrete that thick ( other than heavy Engineering (Bridges etc).

Do we know if the power imported constantly from France is listed here under imports or nuclear?

Is the duct rectangular? 99mm deep shown by maybe twice that wide? That is a big duct compared to the standard 110mm round ones. Maybe they can accept narrower like this.

Could be interesting in Lincolnshire if Reform ban renewable energy. Or do they mean the production of it, while importing from elsewhere? That brings us back to the earlier point of whether it is fair to have areas with no production but the same prices. Silly question really, as they won't have thought it through.

There are standard specifications, measuring the gap under a 3m long straight edge. You could ask the contractor if he is working to such a thing. I don't know what 'level to within 6mm' means. If it means that finished levels would have a range of 6mm from lowest to highest then it sounds good, but not if the -3 and +3 are close together. Concrete shrinks when curing. Are contraction joints proposed?

Sorry @SteamyTea. That isn't the impeccable standard we expect from you. I know it's not you but a source. A graph with no numbers or datum? Where even is zero?

Assuming the joists are as specified for a bathroom then the bath weight is accounted for. The joists are OK. But you could splice more wood on, or a ply plate on the side if it makes you more comfortable. It doesn't have to reach the supports. But, as above, the floor boarding is the weakness.

Problem identified.

It works. Most are probably fixed properly. Because they haven't been sucked off the roof yet doesn't mean that they won't.

But try general bm too. SIG once declined to lower their price for about 3,000m2. I told them what we had paid on another project and they looked it up. Ahhh, that was in xshire. We don't give that price in yshire. It was straight from the factory in Wales ( ?) so they could have put whatever % on that they liked....so shop around. They then said they'd match any better quote, but they didn't deserve that and lost it. Try a national bm and a local one and SIG.

That is the proper way. But the contractors should know that, and if they don't.....what else don't they know? Plus it is now tugging the panels off...are they fixed well enough?

Inside the room, so the heat is still coming in. It will then convect up into the room unless it is tight to the dealing. Shutters are steel and outside the window, in the reveal. They get hot and it doesn't get past.

I suspect thd jetting process needs an enormous stillage pond. Then the clay and silt will sink slowly and form new strata. Are you willing to tell us why the basement is appealing and if the existing walls are adjacent? OK to say no.

Seems so obvious. Transmission losses will reduce too. I guess Scotland could say "no, that's enough". Lake District and Pennines perhaps couldn't.

How the Mediterranean deals with heat. Of course some use chillers...little ones cost about €300. Build with masonry. Usually clay blocks with multiple cells. Insulation is gradually being adopted, but more for winter. Paint it white. Tiles on the roof on a concrete structure. In the day this absorbs the sun, and at night cools down. Shutters outside every sunny window, closed to keep the sun out. Opened at night. Purge the air in tge evening. Live more outdoors. Go to bed late, after the evening air has moved through. And getting used to it helps. The stone will absorb the heat. Where is the heat coming from?

To watch the faces of contractors and insurers as you explain this proposal to them. A retrofit basement is surely only justifiable in a very expensive city centre where land and m2 is worth a fortune. Unless it is a relatively small hole in the middle of a big space. Basically a service pit, or a wine cellar.

Sounds awful. The last thing I'd want in a basement excavation is water.* Can you explain more? What does suspending clay mean? How do you intend to excavate? How are you stopping the building collapsing? *second last thing, after rubble from above.