Onoff

Cuprinol Anti Dlip Deck Stain really does what it says on the tin. I was dubious when SWMBO bought it but it's excellent. https://www.cuprinol.co.uk/products/anti-slip_decking_stain.jsp

My brother seems to think this will cut thin, circa 1mm, copper sheet: https://www.screwfix.com/p/erbauer-emcs650-650w-85mm-electric-mini-circular-saw-220-240v/906fx ???

Why not use the grooved, 22mm boards? For example: https://www.thefloorheatingwarehouse.co.uk/acatalog/Heatboard-Grooved-Board-System.html

He gets me.

I find leaving EACH joint overnight works...

I took it as a challenge to go solvent weld. I blame that Welsh fu.... ?

Yep, that's what I meant.

Hope he did. He was told! ?

Plug the bottom if you can. ?

How about some PVC gap filler wiped round with a gloved finger into the joints you're concerned about? Might be a bit messy but so what. https://www.tradingdepot.co.uk/polypipe-gap-filling-cement-gfc100

? Is the one @AnonymousBosch linked a brush on formulation? Mine's in a tub and like a paste.

Nope, this. https://www.wolseley.co.uk/product/center-center-jet-blue-plus-500-g/

See what I mean @BotusBuild, people on here have their favourites! So far we have: Jet Blue Plus Rectorseal Water Hawk Some say they find the Jet Blue Plus i use a bit greasy. (I don't). As I say if you go with one it's good to make sure it's safe on potable water. @Nickfromwales I think uses something else...

I dont use ptfe tape (any more) on compression fittings. Just Jet Blue Plus. You get NO weepage and that horrible green calcification as you call it. For me it was a revelation tbh. Others on here favour similar products.

Did you use Jet Blue Plus or similar on the compression joints or are you just relying on the olive? Wouldn't be weeping if you had. It's magic on brass fittings. They do up with no squeaking and do up tighter too without extra strain on the fitting. You can use Jet Blue Plus on potable water too whereas some pipe "sealants" you can't. https://www.wolseley.co.uk/product/center-center-jet-blue-plus-500-g/

Same here: https://www.tradingdepot.co.uk/compression-fitting-male-elbow-with-drain-off-22mm-x-3-4 Mind, I've time on my hands now to go and carry on looking in other places for the one like his original! ?

It's you, nothing surprises me! ?

I'm just big boned! If you don't bother with a shower screen your layout could come in well handy when you've got food poisoning. Just projectile vomit into the shower tray whilst sitting on the bog!

Where is the 100mm, from the top of the door frame to top of OSB? As per red arrows? What would really help is you holding a tape up and taking a photo! ?

Do not go hacking anything off! Not what I meant! I had the idea you want to bring the inner sill, the OSB covered bit, up a bit higher? I was thinking something like this. Excuse fag packet and poor sketch: Thing is I don't know if its necessary but I can't see a big chunk of insulating material there would be a bad thing. To help guard against cold bridging at that junction.

This is why people get the ar5e with you! I ask for a better photo and you say no what's there is good enough! ? It's your opinion it's good enough for me! Let's be honest we're guessing as to the section through of that threshold unless you do a sketch. Any insulation would work I guess if packed in tight but you would need to support the timber top somehow with "blocks" or strips of timber here and there. I'd be taping all joints too where the door meets the surround. Tbh I'd expect foil tape to maybe split over time if used there as it's not got much give. Proper air tightness tape better. Best I guess in the absence of that is low expansion foam in any gaps, silicone then whatever tape; duct, foil etc.

I'm wondering whether you put a 50mm slab of pir the width and length of the sill then over cap it with say good quality exterior ply that you could varnish? Is that a gap under the doors I can see?Got a better picture? There is a specific load bearing insulation type slab but its bloody expensive and I forget the name. You could maybe insert some 50mm deep supports into the pir here and there to give some support for the ply to bear on.

?100A fuse carrier too. Nice if there's a 100A fuse in there. The backboard looks to have got a bit scorched perhaps looking at that black mark?

I'll go and have a look in my salvaged fittings tubs. I keep everything!

That is I believe the BS number.