Onoff

25 x 450 SDS bit - cheap before it was in the clearance section! https://www.screwfix.com/p/titan-sds-plus-drill-bit-25-x-450mm/30352#product_additional_details_container

Yes. Just need to cut the mosaics.....

Vertical "batten" just felt right:

I'm just about to go ask if any of them fancy tiling!

Bastards! Sitting here with a pen and paper thinking how this place could be redone. Got as far as putting North on the paper! However one of the 11 year old sleepover lot wants to be an architect, maybe I'll ask her!

The shower/basin waste run as is (in white), just ends above a grill over the drainage gulley as per the sketch on p77 so no gas ingress as such but maybe a little "stinky waste pipe" smell yes. SWMBO really not keen on dropping shower etc into the soil pipe so I reckon it''l be my long run idea but with a universal solvent weld AAV like this and then run the wc overflow separate and out the eaves.

Thinking further on this...the current run in white, compression fittings has never had a issue with the shower or basin discharging and there's no AAV in the run. Is it maybe that the upstairs ensuite overflow thst drops into this pipe is acting to allow air into the run? In the last pic above it's the small white L shaped run appearing from the insulation halfway up the wall.

Could you maybe drape a full length tarp along the wall(s) where the upstand is, just before heavy rain perhaps tucked up under the gutter to negate water running down the walls and behind the flashing etc?

No offence but companies who advertise on here get shot down but you as an author can self promote? A bit "double standards" tbh.

No chance the block paving has split the membrane at the upstand(s)?

It'd be nice if on here we had a "Gallery" of finished builds with a rough location and maybe a very brief construction method; TF, ICF etc

I like the American solar forum, forget efficiency just make it BIG!

I even posted a picture of my foam trimming weapon of choice on 30 July...

Sliding door to the kitchen off the utility room? Folding door?

Use a bendy old bread knife or blade from a hacksaw to cut foam flush to the surface you have just filled.

Vermin btw will quite happily run up a rough cast wall.

And rightly so! For all that whinging and whining you've proved YOU CAN!

LIke our cats. SIts there, over fed and says "Oh, a rat, we need a cat!"

Man flu starting I think...

At least it shouldn't blow down...

Behave! Telephone & electric poles along with DG windows aren't original nor is plastic guttering, just fit the socket as suggested. Best take down and TV aerials too for originality! The linked drill from Screwfix, is that long enough?

In this photo, you can see a horizontal white 35mm OD pipe coming out from under the dormer, down low and teeing into the 11/2" run. That's from the upstairs ensuite basin. It can't be raised, it is where it is. If I add a 87.5o 110mm branch like @Nickfromwales says, in place of the 45o bend with the cap on: ...and put the ensuite shower waste into one of these: ...then all that will end up too high for the basin waste to tee into. Any suggestions? Cheers

Someone in the US mulling using his oil filled backup tank as a solar thermal store. Novel! https://simplysolar.supporttopics.com/post/are-there-any-reasons-i-should-not-use-and-oil-tank-with-oil-in-it-9503186?pid=1302000479

What I said. If that doesn't show then soak test other possible ingress points some way from the "problem" one.

Whilst that small window is out I'd do a hose test around the upstand.