How do I bathroom / kitchen / extension? etc.

Just reread that, the socket rather that the washer being 60cm is much more achievable.

Yeah I don’t think that’s right. I think the regs mean a bathroom socket which is different to a socket for a washing machine.

This is a good thread and I feels familiar with what we were told.
https://www.mybuilder.com/questions/v/8991/is-it-legal-to-fit-a-washing-machine-in-the-bathroom

Not absolutely certain he was telling the truth, but our builder put a stud wall in between shower and washing machine / tumble dryer sockets and said that was necessary and sufficient for regs. Would be much less than 60cm through the wall but much more going around

Edit - not actually sure if there's a socket or if they're wired straight in

I'm pretty sure the zones ignore stud walls as the diagrams show circles through nearby walls, but perhaps a thicker wall would be fine? Might depend on which officer you get as I don't remember it being particularly detailed around treatment of corners/obstructions...

Edit: Complete stud walls would be fine, the diagrams I was thinking of are for incomplete dividers in bathrooms (which don't really affect things). 2018 BS-7671 example attached.

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This is out of date.

The only electrics you can have in zone 2 would be SELV (low voltage). Think fans, shaving sockets, etc.

Note that the unit itself has to be IPX4 rated to be in zone 2. But I expect that's easily achievable nowadays.

Yeah, doesn’t surprise me regs change, but not being able to have a normal socket in zone 2 was the point I was making.

Sounds like the deal breaker is the socket.

Yep, a normal socket would still need to be 3m from water sources (old reg), but a fused spur for a washing machine needs to be outside Zone 2.

There's a not-so-good work around involving passing cable through a zone 2 wall and then mounting the switch to the other side of the stud. Not ideal!

2018 BS-7671 for zone restrictions attached.

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Surely these diagrams do show that stud walls make all the difference?

My tumble dryer and washing machine are approx where the red X is here. If there was no partition, they'd be zone 2, but they're not because it measures from the edge of the partition (minus thickness of partition), not through it

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Yep, the circle around the corner of the partition is perhaps unexpected?

But you're good, sorry if I confused things.

Our extension plans are starting to take shape.

Current frontrunner in terms of design is one with a pitched roof, but I've just seen a design I like that makes a flat roof one look a bit less boring.

Has anyone here done a flat roof extension with a green roof?

I think something like the flat roof design below, but when you look out of the window you see some kind of greenery, would look great.

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We’ve got a pitched roof as per your plan but a window either side at the top and it completely destroys any view out of the back of the house. I would love a flat green one to soften the view towards the garden. I think our existing probably comes a bit higher than your proposed though. Whole extension is shit, both double storey part and garden room, drives me mad.

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If flat ends up a non-starter for you maybe you could push for something a little more asymmetric to give more clearance near the window?

Just nearing the end of our build- this will be sedum / green when we can afford it:

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Dad's neighbours have a flat roof extension with sedum. Nice view from upstairs, but bear in mind the side walls go higher on a flat roof (height plus parapet) than pitched (the lowest edge, obvs), which may impact on daylight to the sides.

All that glazing on the West face means it will really overheat in the summer afternoons, FYI

Haven't got a flat green roof but my extension had a fibreglass roof. Nice and easy to lay and repair if needs be.and crucially, if you have a flat roof it makes life a lot easier if you need to any work to the gutters, soffit, facias or windows.

Roof shape should only be about orientation, structural strength,maximising your budget, potential ceiling height and/or satisfying planning? I'd not consider unrelated projects.

There are plenty of scenarios where a pitch, or flat roof would be better. The view out of the upstairs windows is one consideration, but what's the opportunity cost?

It sounds like you need further discussion with your architect? Or if self-submitting then I'd try to view neighbour's properties (or similar) to know what's possible/best?

How about a combo? We're about to do this:

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Visually interesting but otherwise why would you do this?

Is it because you get an extra foot or two of ceiling space?

Ceiling height, exterior visual interest, solar gain management (large Velux on pitched roof which won't get direct sun after morning in the summer), and we're gonna have an exposed steel beam spanning across from the flat roof so will hang in the air, which I'm into as I'm a ponce.

Ah nice. Thanks for elaborating :)

Thanks for your input everyone. I was actually Googling asymmetrical extensions and interesting shaped ones when I saw the flat roofed zinc clad one that I liked.

I thought a sloping roof but sloping down from left to right might look good, but again would serve no additional purpose other than looking different to normal.

The window looking out over the roof is one of our boys' bedrooms, and so considerations about the view from it probably aren't too high up on our list of priorities.

Our architect has given us these two roofline options just as initial ideas, but we haven't properly discussed the likely cost implications yet which will probably be what ends up deciding it - but if we do go for a flat roof I'd like the green option, once we've properly looked at potential downsides (sycamore/buddleia/weeds taking root? Everything dying and looking shit? Difficulty of fixing problems with it?)

Just to chip in on this… our neighbour has a flat room with sedum, and chicken wire which he had to put all over it to stop cats shorting on it. Proper glass sloped roofs are more spenny than flat fixed skylights too. I’ve seen some good asymmetrical extensions with two flat roofs.