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Hi, I've scanned the forum and can't see an exact answer, so apologies if I'm duplicating stuff that's been covered before. I have a 6 metre x 4 metre kitchen concrete slab floor in my kitchen. It's ten years old so modern standards - well insulated, damp proofed. It has wet underfloor...

Indeed, I was. Hopefully the context in which I used it is clear to you and goes some way to explaining to you why I did so. I fear that this thread is veering away from sensible discussion about electrical matters, so this is now the last post from me. As before, thank you for your help and I...

Hi John, Thanks for the reply. You are right to call out 'SWMBO' generally; it's an artefact of misogyny, best left in the middle of the last century with mother-in-law jokes and anything related to Jim Davidson. In my case, as I am sure you see, the use is consciously and intentionally...

Dear John, You know nothing about me, my partner, our relationship, or our mutual humour. But, still, you feel free to pass judgement if it makes you feel better. Keyboard warriors like you do, after all, make the world a better place. Just rest assured that your sense of grating is all your...

It'll never catch on.

Thanks both. I have to say, having now spent the best part of a day scissoring some slightly springy joists and fitting the stuff, the 'chatter chatter', bang-the-cupboard door and rattle the cutlery tests tell me that the acoustic insulation has made less than bu66er all difference. Still, I...

Hi, SWMBO has deemed that we should stuff the floor joists to our kitchen ceiling with 100mm of *acoustic* insulation (so kitchen chit chat doesn't get overheard in the bedroom above) before we put new plasterboard on. The joists are ~240mm deep and various lighting and socket cables are...

Thanks @^woody^ I am notoriously limp wristed, so was hoping for a solution that used electricity. But, I'll try the bolster chisel for a bit before having a little cwy. Dust isn't really an issue. When I say "kitchen" I actually mean a room stripped back to bare walls with a taped up door.

Hi all, I have an Edwardian brick chimney in my kitchen. I want to create a squared-up opening in it. The brickwork in the body of the chimney starts to form the throat of the chimney below the height at which I want to square the opening up. I have had formal calculations done and inserted...

Thanks. I'm not trying to be deliberately obtuse (just trying to understand) but ... Ok, get it. The devices cannot cause any sort of overload. But, short circuit. If the fault current is likely to be 100s of amps, why are you suggesting I swap the RCBO for a 32amp one and/or why is John...

Hi John, Thanks for the post. I am clearly not a spark so excuse the dumb question, but if 2.5mm cable is rated to 27A maximum, I don't understand how a 32A RCBO would (and a 45A RCBO probably would) protect it from a short circuit induced high load? Is this the "can withstand approx. 1.5 x...

If I were perverse, for reasons I can't think of right now, and insisted on keeping the 45A RCBO would using 4mm cable for the links to each appliance be better than using 2.5mm? Thanks, again, for your help.

Rationally, nothing, I guess. Just feels a bit messy but I guess it's what everyone else does.

@EFLImpudence - Thanks for the reply. I guess I am struggling to find a junction box that isn't some sort of surface mounted monstrosity that will take a 10mm cable and 5 or so 2.5mm cables! If I don't fuse down when I break the 10mm cable into multiple 2.5mm cables before I get to the...

Hi, I have a 10mm cable, fed from a dedicated 45 RCBO in my consumer unit, feeding my current range cooker. Everything (mains incomer, consumer unit, all internal wiring) done in 2012. SWMBO has redesigned the kitchen. She has ordained that we shall have a 16 amp rated oven; a separate 13 amp...

Hi, Thanks for all of the replies above. (1) Whatever the rights and wrongs of the '45 degree spread of the load', it's a bit of a moot point. The beams are steels are roughly central above the door frame and that's roughly a square area of brickwork above the door frame too. So, one way or...

Hi, We've taken down our kitchen ceiling and think we've found the root cause of something. Our house is Edwardian. Resting on the wall above our kitchen doorway is these two steels. They're supporting a single skin, single storey, internal brick wall above (about 4m long x 2.4m high). For...

@JohnD - You are right, the external stone header is intended to be decorative. Its inclusion in the scheme has been specified by me as an aesthetic requirement. The SE has then proposed a set of steels that will sit behind it and take the full structural load. He has, though, additionally...

Thanks for the replies. In fairness to the SE he is not specifying that we must have a structural stone header. The load is carried by the steels. He is suggesting that it would be preferable "belt and braces" to attempt to find a stone header that can take some load. His design, though, is...

Let the lime mortar crust over a bit then smack it in hard with a slightly damp churn brush - makes a fantastic finish. The pointing above - not my cup of tea: I don't like the pointing-stands-proud crazy paving school of pointing, looks pretty unsympathetic to what was there before and has...