Oz07

My door sits around 10mm higher than slab and around 20mm of slab is exposed. In driven rain the first couple of hundred mm gets damp but generally stays dry because door is fitted behind 9" brickwork

expansion of slab. Your edging blocks will be haunched with concrete below gravel level. Mine is flush with edging blocks at top, probably 30mm higher than the block paving outside, then this ramp goes down over a meter or so to probably 150mm below ffl

If you ever fit rubber threshold under door it would span this also

Thats what I did with foam strip in between for expansion

Sorry missed that thread last week

Wouldn't a wider steel help eliminate the problem?

Could someone please quantify in laymans terms the real world difference of a wall u value between .18 and .2 for me? Single storey dwelling with around 90m2 of walls exc apertures. It's the difference of 25mm on chosen wall make up and I think the gain of 25mm would be better.

What i am saying is one run is inbetween two fixed points. Its obviously harder to fit than a kitchen with 2 free edges. Like I say if the dims are tight you may have to rip some units narrower. For a joiner it's probably a 3/10 difficulty if I have to give it a number?!

Depends how accurate dims are. Could well be ripping some off back of all l/h units

Id leave tiler to prime it. Not your fault if fails then

@joe90 is the airtight osb a specific product? What's the cost? Cheaper than membranes?

wouldn't worry about it @joe90 you've built a nice comfortable house now to enjoy (/garden!). What air tight detail did you do in your loft? Membrane or smart ply?

Dont fancy keeping those around for future DIY then @PeterStarck?

@Vijay surely you are winding him up?!

Talk about the long way around! What about a hole in roof and crane it in!? bought a pair of glass suckers off eBay for a tenner. Used them once then sold them for a tenner to the plumber who fitted the tray with me. There is no way simpler that allows you to manoeuvre tray with trapping fingers