New chimney cap - pour in place...

[Carrerahill]

I wanted to run this past the collective minds of BH.

 

I am getting a new roof done at the moment, with the scaffolding up I used it as an excuse to do everything I could, that needs scaffolding, so the chimney has had a makeover, parts rebuilt, new render etc. last thing to do is fix the concrete cap the 4 pots sit on.

 

What has been used before was 2 No.  3' x 1.5' concrete chimney coping stones put on the top side by side, they each have 2 holes in them for the pots and the pots would appear just to be sat on top, maybe slightly countersunk into the coping and mortared into place. I didn't want to totally remove the 4 pots and concrete and mess with the 2 liners for stoves etc. so I left them be and rebuilt everything under them, now the tops are a mess of old mortar and the joint between the 2 stones have missing mortar and what not, so my plan is to screw some formwork to the outside edge of the existing stones, maybe 2-3" high and pour concrete in, it will seal and lock the whole thing up and will trap the chimney pots solid, I'll put a slight slope on it and everything should be good. I'll drill in and add some steel to key it all in, I also have concrete water-proofer I can add to the mix. 

 

What do you all think?

 

I do like a bit of concreting and I am, if I do say so myself, jolly good at it, so I know I can do a good job, it's just the actual concept I am not sure if there is a better way. I could always just make up a sharp sand mortar and haunch it all, but I feel that won't be as good, long term, as a solid concrete cap

Edited May 23, 2023 by Carrerahill