Hello. Newbie after advice on running external cornice.

#1
Hi all, when I say newbie I mean new to this forum not new to plasterwork. Ive been at the plastering in all its forms for over 30 years. My question is about running a cement cornice on a parapet wall. I've just done one where the old stocks had pretty much dissolved with damp so had a brickie rebuild the parapet and corbel out two courses to run the cornice onto. All good but...

I've got a couple more similar jobs coming up and the parapet (with no cornice at present) is in good shape so rather than knocking it down and rebuilding it i wondered if anyone knew of brackets i could chem-fix onto the wall which i could attach SS lath onto? i was thinking of fixing rods into the brickwork and attaching ribbed lath along them to run over which would be quicker and less disruptive than bricking.

Any opinions on this would be very much appreciated.
Cheers.
 

malc

Private Member
#3
Hi all, when I say newbie I mean new to this forum not new to plasterwork. Ive been at the plastering in all its forms for over 30 years. My question is about running a cement cornice on a parapet wall. I've just done one where the old stocks had pretty much dissolved with damp so had a brickie rebuild the parapet and corbel out two courses to run the cornice onto. All good but...

I've got a couple more similar jobs coming up and the parapet (with no cornice at present) is in good shape so rather than knocking it down and rebuilding it i wondered if anyone knew of brackets i could chem-fix onto the wall which i could attach SS lath onto? i was thinking of fixing rods into the brickwork and attaching ribbed lath along them to run over which would be quicker and less disruptive than bricking.

Any opinions on this would be very much appreciated.
Cheers.
when we had a similar contract all i did was to get my local fibrous plasterer to run us up some lengths of cornice in sand and cement . all we had to do was fit the cornice, simple.
 

Olican

Private Member
#4
Hi all, when I say newbie I mean new to this forum not new to plasterwork. Ive been at the plastering in all its forms for over 30 years. My question is about running a cement cornice on a parapet wall. I've just done one where the old stocks had pretty much dissolved with damp so had a brickie rebuild the parapet and corbel out two courses to run the cornice onto. All good but...

I've got a couple more similar jobs coming up and the parapet (with no cornice at present) is in good shape so rather than knocking it down and rebuilding it i wondered if anyone knew of brackets i could chem-fix onto the wall which i could attach SS lath onto? i was thinking of fixing rods into the brickwork and attaching ribbed lath along them to run over which would be quicker and less disruptive than bricking.

Any opinions on this would be very much appreciated.
Cheers.
Welcome along Alfie. Lots of videos on YouTube showing different approaches. Maybe look through a few and see if there's one similar to yours
 

t33ch

Active Member
#5
Hi all, ... i wondered if anyone knew of brackets i could chem-fix onto the wall which i could attach SS lath onto...
Any opinions on this would be very much appreciated.
Cheers.
If you want to go that route, prob best just temp pin the riblath/EMF in place and then drill and red plug some galvanised banding along the length to keep it in place (stainless screws?). Prob overkill though.

With 6mm drill and 5mm screws you can use the plug/screw combo as a through-fixing so it saves time.

Possibly just using the banding would suffice? I think the most important thing is to get a good bond so that no water can get behind your cornice. As long as you can manage that, it aint gonna drop off.

I have never done this...so just suggestions (or legal action!).
 
#6
If you want to go that route, prob best just temp pin the riblath/EMF in place and then drill and red plug some galvanised banding along the length to keep it in place (stainless screws?). Prob overkill though.

With 6mm drill and 5mm screws you can use the plug/screw combo as a through-fixing so it saves time.

Possibly just using the banding would suffice? I think the most important thing is to get a good bond so that no water can get behind your cornice. As long as you can manage that, it aint gonna drop off.

I have never done this...so just suggestions (or legal action!).


Cheers but the cornice I'm running projects about a foot so there's a hell of a weight. It'll need a pretty substantial anchoring.
Danny.