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1 your diagram didn't work 2 listen to your se, they have the insurance to back it

What makes you think they are not usable? What are you going to use them for? If it's a cement mortar wall I would have thought they would be fine as long as they aren't dripping. The 21% is meaningless except as a relative measure between the same bricks. You could put one in the oven after...

The ground levels have been raised a lot - the original level would be around the level of the gully grid. When a new patio is fitted, the cheapest quote will usually include the least digging out they can get away with. Over time, you end up with a triple sandwich of patio or more. You may...

They are seen any more - they are called rawlplugs!:giggle:

I would have thought so, but that would be a question for the manufacturer/supplier really.

if it's all hard wired then as long as the total rated load is not more than 20A, and the spur is in 2.5mm T&E cable, I can't see any specific problem with what you have mentioned. A stair lift would be an intermittent load (unlike the towel rail) so that would make things better from an...

I put a bit of old wire in the loft to act as a draw cable and got them to install into the old airing cupboard. Technically they said they aren't allowed in lofts, but they did after having a look at the space. They said they can clip it round where you like on the outside, and then similar...

Yes plus As many layers of plasterboard as you can find space for, ideally not touching reach other, and make sure the boxing isn't touching the pipe.

Your posts are very confusing. What is your actual question(s)?

are you sure it was planning and not building regs? Once you remove and replace your roof you have to comply with building regs which would mainly be insulation. When you applied you should have called them out to inspect after the work and then they would issue a completion certificate...

my money is on shower, there are about 2 million ways for water leaks to happen at a shower. could be behind the tiles/panel at the vertical corner or beside the tray, could be the waste or trap or waste pipe, could be a cracked shower tray, could be a waste joint, could be condensation from...

I'm no structural engineer but ceilings weigh next to nothing so I would say it's fine, no need for hangers, and 5mm screws with wall plugs between each joist into the wall. A cheaper option if there's no issue fixing to the ceiling is just batten the existing ceiling with 2x2 and plasterboard that.

Don't confuse internal and external diameters - the solvent pvc 40mm pipe is 40mm internal 43 external, the push fit PP 40mm pipe is 40mm external diameter. And presumably 1.5 inches internal or something. And as mentioned above the compression fittings can handle both.

Yes that's true but that would apply to the cold pressure as well so isn't specifically related to the heating up

Air can leak through a smaller hole than water can. If there's no (compressible) air in the system you would need to take into account temperature changes too. Lots of heating systems have really tiny leaks that evaporate as soon as they form

Yes, the pressure also rises when the (incompressible) water heats up, hence the need for an expansion vessel

Yeah I think he just meant physically the same, but I agree it doesn't affect the laws of gravity

I guess that's a rhetorical question but the return needs to be at the bottom, hot water is less dense so would float out the top again otherwise. Flow is actually better at the top in theory.

What I found out recently, is the word "natural" was deleted about 5 years ago and now it's just "ground level". So unless the ground level changes themselves need planning permission, it's pretty vague

Not enough water in the system for the cold volume, and there's a leak that can let in air somewhere? Check the charge pressure of the expansion vessel is lower than the cold pressure, and that the cold pressure is enough to fill the highest part of the system with the pump and valves in all...