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So had a quote back which was pretty reasonable at £1500 inc vat, but with me doing excavation and ducting. I've attached the plan they sent me. Currently my supply is overhead from the pole and they are mandating it needs to be underground following yellow line. However it's quite a tricky run with lots of concrete. However, I'm now thinking maybe of using the wooden pole near the garage and house the meter, etc in garage or behind garage. I've already got a trench open (in pink line) to then feed back to house. There is also the existing 25m2 armoured cable between house and garage. What are thoughts on reconfiguring and housing in garage? Thanks

Ok thanks for feedback

Hi there, I'm after confirmation that I don't need planning permission for a 40sqm workshop. It seems people confuse that anything over 30sqm requires both planning permission and building regulations? The house I'm in is within green belt, but previous to buying it I got confirmation from the council that I still have permitted development rights. All other aspects I'm complying with, i.e more than 2m from boundary so can have pitched roof and also overall curtailage is fine. Thanks

Thanks for replies. The outbuilding will be around 8m x 5m. And was planning on doing underfloor heating in slab. I was also future proofing a little incase someone in future uses building for any other purpose than a workshop

Thanks for reply. When you say 25mm close cell insulation, what do you mean?

I should add the trench will be circa 700mm deep as also running cold mains water.

Hi there, I'm looking at getting a heat pump installed this year and as part of it I'm provisioning to run feeds to a new outdoor workshop which will have underfloor heating in slabs. Based on my house and this, seems like consensus is a 16kw ASHP. 1 or 2 that have quoted so far just said to run 28mm insulated pipe from house plant room to new workshop (circa 15m). I've already got a trench dug for other reasons so want to lay it now in readiness. Is something like this ok in either 25 or 32mm? https://www.plumb2u.com/32mm-pre-insulated-mlcp-pipe-25m-coil-red-palpex-32025r-c2x41327360 Thanks

Thanks for all the further replies. The company installing the solar submitted the G99 last week to DNO, so will find out in due course. I did also ask for formal quote on 3 phase, so that should also be due back in next week or 2. Sorry if I'm being slow, but I still didn't quite work out if having 3 phase inverter is worth it

Thanks for feedback. The 16kw was advised as part of a recent quote I had. I was already stretching budget to get 16kw battery. But I'll take another look! But as you said it seems easy to add later. I've definitely maxed out what I can with solar at 32 panels for suitable roofs.

The zappi works on single or multiphase. I always charge overnight anyway, so it's not deal breaker if it stays on 7kw. On the main house I'm replacing an existing LPG boiler with heat pump. I didn't realise it would somehow invalidate that grant if i got a separate gas boiler later for other building? Thanks

Hi there, I'm just about to go ahead with a deposit for a solar system but wondering if I should be future proofing more. Currently on single phase which powers the house and a large separate garage and flat above. That is fed on a dedicated 24m2 cable. Solar wise, we are going sig energy and looking at 16kw batteries and 14kw PV. As part of this, we are also getting the multiphase zappi charger. All of this will be housed in the garage. Upcoming in next year or so: - ⁠⁠16kw ASHP. Power input I think is around 6kw. This is sized large to also provide heat for workshop. New large workshop building. It will have a lot of equipment, some needing 16amp supply but as it’s just me in theory I’d only use a large dust extractor (2-3kw max) and 1/2 machines at a time with max maybe an additional 2-3kw. The existing garage will be converted at some point to an air bnb which may put more concurrent demand on. Likely we may but a small gas boiler in to utilise existing LPG tank we have in order to remove existing electric shower and small water heater for tap. I've attached a few photos of current setup. So i guess my questions are... With my future demands (whereby there could be a mix of house, airbnb garage and workshop running at same time), should I be considering 3 phase? Even if the above demands 3 phase, is it worth getting solar 3 phase equipment? Or would it make more sense to seperate phases to garage, house and workshop? I'll also note that utilising 3 phase for the car charger and workshop for bigger equipment is a real nice to have Thanks

So looking at photos on internet for biodisc, I think the inlet is at the correct height relative to the machinery. It's just set down a lot lower than maybe it ordinarily would be and I guess essentially has another riser (or neck if that's what you meant @ProDave? on top to get to ground height. I think the reason it's set so low is that the primary drainage comes from back of house and all the way around side. So it's probably a good 30 metre run in total before it gets to STP. Apologies I thought I'd sent a photo of inside orignally. See attached now. Arrow shows the inlet.

Thanks all for replies. I only recently moved in, but I did have drain surveys done and everything seems intact. See attached a few photos where you can see the vertical drop and then where it enters STP. I haven't determined exact levels yet, so the branch may be able to go higher. Is it worth considering making the run more like 1 in 50 to get the branch higher? Thanks

Hi there, I'm in process of running a new drain at front of house for a new upstairs bathroom. I've dug out where it needs to connect to and got a rough idea of what I hope to do now. I've got the building inspector coming at end of week but wanted to check views here first. As you can see from attachments the connection is very close to the Sewage Treatment plant (STP). The inlet to this is around 1.3m deep where the main line from back of house runs. There is also a separate drain connection that runs alongside this and drops vertically which comes from garage. Unfortunatley it seems like they have bedded it partly in loose concrete and it's proving hard to easily excavate under the pipe to get an inspection chamber base in. So in the sketch I've shown in the dark colour pipe my proposal instead with an extra rodding point as well (if necessary). The new connection is a straight run about 15 metres and will have an inspection chamber and the main existing drain. also has an inspection chamber about 12 metres away. And the drain from garage also has an inspection chamber about a metre away next to STP. Also, yes I'm pretty sure the water is ground water and not a massive leak from the STP. I recently moved in to house and had all the drains surveyed and they all seem fine. So, does my proposal seem ok? Thanks

Hi there, I'm just finishing designing a new roof which is going on an extension and wanted to check to see if anyone had any better ideas for how to weatherproof where I have adjoining cedar shingles and glazing. I've attached a few photos which hopefully are clear. The red is the underlay and the dark grey is either going to be lead (or lead alternative) flashing or I may get it made up in aluminium. I think the way I've detailed works, but open to alternative ideas! I've also attached photo showing the glazing bar end cap. Part of the reason for the way I've design is also to make sure I can somewhat easily replace the glass if I need to. Thanks