Nick Thomas

Powerrrrrrrr. I'll cut some holes through the worktop for easy access to the sockets once the doors are on , and get some shelving in.

Thanks. It's done and I've got my certificate; no earth rod, and it seems he's just used the house earth through the 4mm² SWA. I questioned him lightly about it and he said that the separate earth might have been needed if the garden room had any metal in the construction ("external-conductive-parts" in Temp's PDF, I guess?) but since it didn't, he thinks it's fine as is. In the end it's gone: house CU -> 20A MCB -> 4mm² SWA -> garden room CU -> RCD -> 16A MCB.

Hah, no, I laughed too - as the ringing in my ears subsided. Got it built to the full 7M working / 5M platform height today, and discovered that close-up there's a hell of a lot more pigeon on the roof than expected. Also discovered that the roof is actually a bit more than 5M high, the feet on the access tower make for an uncomfortably wide gap between 5M platform and roof, and that the access paths up each side of the panels are uncomfortably narrow anyway. Long story short, I've sacked it in and will get some professionals to sort the pigeons out. The tower seems fine for wall-related jobs, though; I'll keep it around for the foreseeable. I hope your efforts go better than mine!

So I got my tower built up to 5M working height today (3M platform height). I'd say the outriggers are essential even at that level. Very wibbly wobbly without. Pigeon spikes arrived late today, so I wasn't really expecting to get it done; I'll be at it all day tomorrow. The first build involves a lot of messing around with screws and nuts and bolts and clamps, but it looks like subsequent builds will be quicker. Oh, and if you're not careful, the trapdoor whacks you on the head quite hard as you descend. Very clever. My original plan was to rent a scissor lift for a weekend (~£150); that or a cherry picker would definitely be less hassle than one of these.

I didn't think to ask about earthing. I'll mention it when he shows up on Monday; maybe he's planning to pop a separate earth in, I don't know.

I just bought one of these yesterday! It arrived today. Three heights - safe working height (~2M above platform height); scaffold height (~1M above platform height); and platform height - which is where your feet are. The 7M tower is 5M platform height. I measured the roof height (also ~5M for my two-story newish-build) by flying a drone up to the eaves and reading it off 🤷‍♂️. Once you've got one, you find any use for it you can, I think. Worth noting that the instructions all say "for god's sake don't climb onto a roof from one of these things, jesus christ please stop". I assume this is standard arse-covering, because that's exactly what I'm going to be doing. I guess the main risk is pushing the platform away as you push off - I'm planning to tie mine to the house somehow, to mitigate that. I had a read of the HSE's working at height guidelines and they're a bit less stressed about it: https://www.hse.gov.uk/pubns/priced/hsg33.pdf

So I've got an electrician coming out Monday to wire up the garden room and give it a certificate. We talked through a couple of different ways of wiring it up to the consumer unit in the house, and I was hoping to double-check what we arrived at. The CU: So just the one slot left, protected by the "downstairs" 80A / 30mA RCD. The electrician has proposed moving that RCD and all its fuses left one, so the free slot is next to the 100A main switch. It would get a 16A fuse, then 4mm² SWA out from there, along the side of the house and into the attached garage at about shoulder height. From there, it'd join to another cable I've already laid - also 4mm² SWA, and 25M long - which goes out of the back of the garage, along the line of the fence in the back garden (in plastic conduit, for all that's worth), then under the decking - again in plastic conduit - then under the garden room and into it through some 68mm drainpipe I put through the wall. There'd be a tiny consumer unit on this side, with a 16A fuse and RCD protecting 2x double sockets. No lighting circuit. Total SWA run probably ~30M. The reasoning was that if there's a fault along that cable, or with an applicance in the garden room, it won't affect anything inside the house, which seemed compelling at the time. The more I think about though, the less I like the idea of that 30M cable run just having the 16A fuse on it. What do the good people of BuildHub think? Is this a sensible thing to do, or would RCD or RCBO protection for this cable in the house CU be worth it? If so, would you tag it onto an existing RCD or find a way to free up more slots, to make room for it to have its own? The leftmost slot 4 is the heat pump,and its cable goes the same way as the new cable will go, so if I did need to free up space, I was thinking I could have a CU in the garage (40A?), and have the HP go from that. I assume if I did that, I'd still want the CU in the garden room as well?

Up to you of course, but just in case you weren't aware, you can get specialised induction hobs for at least woks, e.g: I have a friend who absolutely refuses to switch; I'm beginning to suspect she just likes the gas fumes ^^. No idea about karahi though. Best of luck with the refit! Keep us updated.

We did look at getting one of those at last year! Not practical for the regular inter-town trip with a baby seat, though.

I assume the advertised U value depends on the recommended compaction level? Any idea how much reduced compaction would affect it? A quarter less material = multiply by 1.25?

Hah, yeah, definitely not safe to be on. The garage is a shade under 3M wide and there are 5 trusses, so 700-750mm between them. It was built at the same time as the house, back in 2011 or so. Even at this size it's pretty useless for putting a car into, so maximising storage makes sense. Just... not like this.

Ah, yes, good shout. Octopus did the paperwork on this for me and didn't charge, but others might. The BUS grant munching installers did the actual physical removal of the meter - or at least capped it off, I don't remember exactly - and didn't charge either. Apparently the network owners - Northern Gas Networks? - are meant to come along at some point and remove the line between the gas main and the property, where the meter used to be, for safety reasons. They sent me a questionnaire after about a year asking about any new meter, but I've not heard from them other than that.

Maybe. In my head the ply was added by the previous occupants to get some storage and hang a bike off, and their other examples of work have been pretty poor.

This is fine - there's no requirement to remove the gas completely. It's the boiler upgrade scheme, not the cooker upgrade scheme I second the induction hob recommendation though - my installer was able to remove the gas meter on request, and that saves the gas standing charge, which comes to ~£10/month. If that's not music to a yorkshireman's ears, I don't know what could be.

Finally got the straw out of the garage and was admiring my handiwork, when something about those joist hangers caught my eye.... The trusses themselves seem to rest on the brick/blockwork and the plywood is screwed to them, so I assume there's not much load going through these? Seems bizarre though.