Onoff

Rotten / worn hardwood sills are replaced quite often, leaving the jams in place if good though more often than not at least the bottoms if the jams will need replacing using say a scarf joint. It's proper, old fashioned chippy stuff. Guessing what it the sole plate of your wall is currently your "sill"? You could cut that out and drop in a bit of hardwood sill. Ideally though the sill ends go under the jams. You have what you have so have to work around/adapt, lots of options! Your dad sounds like a man who'll figure it.

I've decided on my mix. Was waiting for SWMBO and the kids to lay out their panels. SWMBO had a go and imo it looks alright (panel No 4) but I don't think it'll work as there's little depth to the stones she's chosen. Thinking these shallow stones will maybe fall out over time?

He was I believe schooled in Kent, God's own county.

Usually your hardwood sill is put in as part of the door frame. Traditionally the jams fit into the sill as tenons. The galvanised weatherstrip extends into the jams. Like this. Why not fold up a bit of aluminium sheet to go over the softwood "sill" that's there, then add a modern, all singing threshold strip on top of that?

I have my Skip Diving badge!

You really want a hardwood sill there as it'll take lots of weather and abuse. You could graft a hardwood bit on the front I suppose.....

You can get them combined as a threshold bit then a weatherstrip: https://www.wickes.co.uk/Wickes-Threshold-and-Rain-Deflector-White-838-mm/p/203002 Or put a traditional wooden bit on the door to oversail a modern, sealing threshold. Search the Stormguard stuff:

Yes. Because too you have a grooved front you might want to silicone a weatherstrip on above something like this below: https://www.google.com/search?q=inward+opening+door+threshold&client=ms-android-motorola&prmd=sinxv&sxsrf=AOaemvJTOQkB52qwZ86TFu9Nd1m7j6ziKw:1632083566354&source=lnms&tbm=isch&sa=X&ved=2ahUKEwiz2dyJ8YvzAhUdDmMBHWIGDykQ_AUoAnoECAIQAg&biw=360&bih=512&dpr=2

A few on here have Bora downdraft extractors I think. Search "Bora".

Well you have been busy...

If you get a plain, IP6x rated box and drill the gland holes yourself, you can arrange the 2 banjos so they "meet" and you can use x1 6mm brass bolt. Take an earth fly lead off that with a ring crimp. Just use Wagos inside to connect everything together. Sort of like this, bits grabbed at random in the shed:

I think we've established it's jam and cream...or is it cream & jam? They can get funny about that I believe.

?

For a shower tray? Good luck with that.

I thought it said challenged dad... 8-10 years seems a fair estimate for this job.

Stick a couple of bits of 1" thick scrap wood between where the gates meet whilst setting up the second one. Tape it on temporarily etc. Leave in there whist the second post is setting.

Ed's brick making:

Shows what I know, I thought it was smoked salmon, not jam!

If I recall correctly, then @Construction Channel found by chance that brick clay had been extracted historically from a field on his family's land. He promptly went and dug some up and cast an E&F plaque to go on the gable. From memory his attempts cracked and crazed.

Cream cheese rather than scrambled eggs there methinks?

Lime...ask 10 people get 10 different answers I've found!

Looks great ? If the post depth on the 4' gate is ever an issue down the line you could add a diagonal brace from near the top of the post and concrete the other end into the ground or a tie in the form of a steel cable etc. I'm sure it'll be fine. As to different height posts if it bugs you then knock up some subtle / fancy timber post caps to hide the mismatch and make a feature. Worst case you have to redo the post on the short side. Try and make sure the leafs can't swing out into the road and be hit. That's grief you don't want!

No, I've a metal staircase kit so thought I might make a temporary one from the. 4x4s whilst I dick about selecting fixings... ?

I've just scored 8+, 4x4, reclaimed pine posts, each about 8 - 10': long. That's hopefully the frame and roof sorted.