Dave Jones

imagine the surprise. ...

this is a really good example of why many warm roofs fail. A combination of lack of properly sealed vapour barrier and the insulation (or lack off) bringing the dew point into the building.

just read the regs 5.16

bit silly having to pull out a WC to rod it isn't it. Always try and build to the best standard not the worst.

only relevant to multi property storied buildings. Not single occupancy houses.

they are correct you cannot use a Y for 2 WC's as they cant be rodded. NHBC spell it out https://www.nhbc.co.uk/binaries/content/assets/nhbc/tech-zone/nhbc-standards/tech-guidance/5.3/p261---tg-5.3---y-junctions_v1.pdf

5 pages of crap, to sum up. heat pump was a total waste of money for this property.

Howdens, jewsons, travis etc etc

you can go down to 3m with a 450 chamber and reducer ring but they are not really practicable to rod at that depth. your in brick built / conc ring territory at much over 2m. they are quite easy to make out of 110 pipe, see here for an example. Depth is going to be your problem. https://www.pavingexpert.com/drain05

feed it to where your gutters drain.

may not be needed depending on the side fixings, adhesive foam is surprisingly strong.

interesting scaffold bench supports on the roof, what are they called ?

much better solution and nicely done as well.

13mm per M is min fall so plenty of scope.

I wouldnt have bothered putting down a finished drive before the build starts as it will get destroyed during the build, muck aways, telehandler, digger etc.

450mm chamber can be used upto 1200mm depth. Siteing really doesn't matter put them where you need less bends. It's cheaper to use plastic than have brickie make a chamber with a single benched flow. They come with a 5ton round lid, if you think you will have HGV's going over it for deliveries you can get iron lids.

The GSE kits do work pretty well, they are let down a bit by the rubbish stick on flashing though. nice roof, the slate to metal transition looks very well done.

too cheap. 2-3k now.

who pays the other £10k for the rest ? Farce.

im sure there is an odd exception as you say but its a different colour for a reason. Using the correct stuff saves having to dig out extra paperwork for building control like you have above. Enough hassle when building without making more !!

2300 is still too low for me. What was you build up to FFL ? Could 200mm not have been squeezed out of it ?

because below ground drainage hasn't been manufactured to BS EN 1329 which is required by building regs. Same reason you cant use above ground drainage below ground. Like you say would probably be ok but best to do it properly as the cost isn't that much. https://www.polypipe.com/housing/above-ground-drainage-faqs

there is a much cheaper alternative to the geberit frame that is pretty much identical, the make escapes me but its half the price. It doesnt have the air extraction connection though if thats what you were looking for.

was a little tongue in cheek, they just never are 'that' accurate. ok for modern stuff but where they have transcribed from old paper plans can be literally miles out or not show anything at all when you know its there.

don't be silly. you cant fit architrave above a door with a 2m ceiling. 2300 is the absolute bare minimum for NHBC.