What are these and how to repair them

[tomredsky]

I have some scaffolding up because we're having a loft conversion and I noticed these coping stones that separate our house from next door. They look loose and I'd like to get them repaired or stabilised. But I don't know what the right name for them or what the process is to repair them. Any advise please?

 

[^woody^]

Saddle back coping stones. Just like what you put on garden walls if you want to watch some videos

They look a bit light for that location, so make sure you do a good job sticking them down, and jointing them together.

 

[ree]

OP,
In the loft & the rooms below are there any signs of water penetration on that party wall?
The parapet in general is in a poor condition.
The roof cover & the flashing appear to have been wrongly fixed.
While the scaff is still there perhaps you could contact the neighbour & work togther on both sides of the parapet?
It would pay you to correctly fix the roof before any dormer is built.

 

[tomredsky]

I could ask the builder to re-lay them but I'm pretty sure he'll get the labourer to do it and he's a bit slap dash for my liking and that's besides the charge and VAT.
If I can muster the guts, I should be able to do this. There a make shift roof ladder in place.
Is it a 4:1 mix? I have a bit of cement that claims to have lime in, might that be better than standard stuff? Do I take them all off or one at a time? Start at the top rf bottom?
This is what my the hiuse opposite looks like.

 

[HERTS P&D]

I could ask the builder to re-lay them but I'm pretty sure he'll get the labourer to do it and he's a bit slap dash for my liking and that's besides the charge and VAT.
If I can muster the guts, I should be able to do this. There a make shift roof ladder in place.

Do yourself a favor and hire a roofer. One fall would be your last.

Andy

 

[^woody^]

Is it a 4:1 mix? I have a bit of cement that claims to have lime in,

No to the mix and lime

3:1 sand/cement, and the sand ratio needs to be at least 1/3 sharp sand.

The wall and the copings need to be thoroughly clean and dust-free and then well bonded with full joints.

You would do them all at once and you need to line them through with a string line.

Don't underestimate how hard and awkward it is to do this work.

FYI, if you instruct the builder to do work, that implies that it is done by a proper tradesperson for the work. But if you like, all you do is say that you expect a bricklayer to lay the copings and the labourer to do the mixing and bring the stuff to the bricklayer.

 

[ree]

OP,
I presume that both pics show the same front elevation of the same roof?
The fibre cement slates & the flashing in the new LH side pic are correct - the RH side parapet flashing and slates should be re-done just like the LH side.
Why not check out the two parapets on the other rear elevation of the roof?

FWIW: The copings in the new pic also need re-bedding.
In both pics all the pointing on parapets & chimney stack is very poor - merely smeared on for a few mm's depth.