Maxium thickness ever tried with hardwall or bonding!

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Barnesplastering

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Hi peeps,

I have a large scale art project coming up on a big curved wall (ex plasterer of 15yrs now wall artist) and I wanted to know if anyone has pushed the boundary's of building up to a serious thickness of plaster. Possibly to 200mm....

I know it's wrong but have a few years ago now, applied 4 coats of hardwall to 60mm on a big scale with no trouble... Well, no news is good news right?

Thinking bonding sticks like ****, just scratch every coat and keep going with a nice skim on top?

was thinking dot n dab with 3/4 layers but again, risky? I've only layered up in small bits..

again, I know all above is wrong, against the white book, but this is an experiment!


Discuss

mark
 
why dont you build the area out with stud and metal lath? it would cut the weight down and be quicker.
 
Done it up to five inches thick...:RpS_thumbup:

An old vicarage, with walls that were way out of plumb. The guy insisted on hardwall because it was going to store wine, and get knocked by trolleys.
Nearly flat to the brick at the bottom....five inches at the top.

Where the gear was firming up I just layered over it, but where it had gone I deviled up and went over again.
Still fine. No cracks or anything after a couple of years.
 
I have done four inches of bonding on a job in Sydenham south London(hope no local plasterer reads this) the house owner was an ex chartered surveyor and this is what he wanted, all walls bonded out to match etc, loads of scratch coats over several days. This was back in the 80s. I also saw ceilings bonded out 3 /4 inches and saw them collapse, I smiled as I was learning and the guy refused to let me work with him, he was good so perhaps it was one of those things..
 
Have you considered wallcrete this can go on pretty thick also cant you use the eml on the wall to build it up in parts?
 
The BS on it is 28 mm ,any thing above can not be guaranteed the face of the brick can hold the weight :RpS_unsure:
 
I would suggest flynnymarra is on the right track, by first forming the basic structure in eml or chicken wire and the odd re reinforcing bar etc
 
CeeVee said:
Done it up to five inches thick...:RpS_thumbup:

An old vicarage, with walls that were way out of plumb. The guy insisted on hardwall because it was going to store wine, and get knocked by trolleys.
Nearly flat to the brick at the bottom....five inches at the top.

Where the gear was firming up I just layered over it, but where it had gone I deviled up and went over again.
Still fine. No cracks or anything after a couple of years.
Click to expand...

A rendered skirt would have done it, the wheels could have bashed into that and the trolley would have been 5" off the wall :-0
 
Barnesplastering said:
I have to carve a massive crack into it and coat the revels with polished concrete. Just don't think the stud ways could work
Click to expand...

a massive crack sounds ok but polished concrete? we did some art work for sainsburys in fine concrete
where we used moulds made from polystyrene. you may have seen them in the entrance ways to the supermarket. but that was in the 60s when they wanted to produce a local feel.
 
Use insulation board and fix it with mushroom fixings carve it then mesh and bonding over the top
 
Mate done about 15 years ago at a MOD newbuild in Faslane every wall was 5 inches thick. In the spec all walls were to be straightened with bonding, what we done was to coat the bonding as thick as we could, leave for a hour or so then lay in another thick coat, after a couple of hours lightly scratch. Next day there is enough suction to let you straighten the walls out, only problem you have to leave till next day to finish and there will be suction in walls. Probably better PVA the undercoat before finishing.
 
Thinking of getting a ply sheeted wall made, fix studs to the front, clad in P/B, eml the revels, bond to shape.... That should do the trick!

Thanks for all your help people
 
Polished concrete effect.. MicroCement etc. Wont looked polished, will look like rough casted concrete!
Think polystyrene won't be strong enough if it takes a few hits?!
 
Barnesplastering said:
Hi peeps,

I have a large scale art project coming up on a big curved wall (ex plasterer of 15yrs now wall artist) and I wanted to know if anyone has pushed the boundary's of building up to a serious thickness of plaster. Possibly to 200mm....

I know it's wrong but have a few years ago now, applied 4 coats of hardwall to 60mm on a big scale with no trouble... Well, no news is good news right?

Thinking bonding sticks like ****, just scratch every coat and keep going with a nice skim on top?

was thinking dot n dab with 3/4 layers but again, risky? I've only layered up in small bits..

again, I know all above is wrong, against the white book, but this is an experiment!


Discuss

BG one coat or Knauf one coat Mark. Welcome along, it sounds like a nice challenge.
Click to expand...
 
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