what way would you tackle this.

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hail hail

hail hail

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Was asked to price some stonework and to float a gable wall today. The gable is done in wetdash. The clients don't like the look of it and hate painting it every few years. Just last year he had to wire brush most of the paint off because it was building up and coming off the house before repainting.

I was saying about EWI would be a better job but they want it floated and rubbed up with sponge finish because it'll be cheaper.

I'm thinking best to strip it all of, scratch it then finish is best way to tackle it but thought I'd ask on here in case there's a better method.

TBH, in all my years, I've never floated over pebble dash and was chatting to another plasterer few miles away and he was saying, PVA, scud, scratch(or2), float but I'm in 2 minds if that's a better option. Seems a lot of more work than what I suggest and I'd be afraid of the PVA failing outside and the render blowing on me.
 
sbr rather than pva , scratch mesh into first coat then you have option to mushroom it , but if it's solid it shouldn't need mushrooms putting in it , it's got a good key as dashing as long as it is solid before you scratch anymore weight on it .
 
Ewi is the best option.
If it gets rendered it will crack and the water will get in.
I've done it before but told the customer I wouldn't guarantee the work.
It's still on the wall but there are a few fine cracks but it was 5 years ago.
To be honest it won't work out much cheaper than ewi
 
I'd hack it off give it a good clean and wash and then scud with sbr in it if they wanted a s+c sponge finish.
 
Hack off scud. I have used pva in the scud coat b4 over ten years ago. It was over wetdash but the dash wasn't painted. It's still there and the job still looks good. It was a 2-1 scud with pva it was like steel after a week on the dash.
 
Jerseyboy said:
Ewi is the best option.
Click to expand...


One thing crossed my mind last night, is it OK to fix the EWI to an uneven surface like wet dash. Wouldn't the voids gather up moisture between the stones and insulation? Maybe it wont but its just something that was on my mind last night.
 
hail hail said:
One thing crossed my mind last night, is it OK to fix the EWI to an uneven surface like wet dash. Wouldn't the voids gather up moisture between the stones and insulation? Maybe it wont but its just something that was on my mind last night.
Click to expand...

I've just done my first EWI and it was over stone work. Parex specced for me and I've dabbed it and then mech fixed after its set.
I think the tighter the better the insulation works as the heat from the wall will get lost in the void instead of being retained by the insulation.
They also told me not to solid dab as any moisture will travel down the void, when a full bed is used they recommend vertical notch lines to help this.
No expert but just going from advice been given.


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hail hail said:
One thing crossed my mind last night, is it OK to fix the EWI to an uneven surface like wet dash. Wouldn't the voids gather up moisture between the stones and insulation? Maybe it wont but its just something that was on my mind last night.
Click to expand...

No problem at all. Most of the EWI jobs are over old pebble dash and with fixings only.
 
Jgreenplastering said:
I've just done my first EWI and it was over stone work. Parex specced for me and I've dabbed it and then mech fixed after its set.
I think the tighter the better the insulation works as the heat from the wall will get lost in the void instead of being retained by the insulation.
They also told me not to solid dab as any moisture will travel down the void, when a full bed is used they recommend vertical notch lines to help this.
No expert but just going from advice been given.


Sent from my iPhone using Tapatalk
Click to expand...
vfr12 said:
No problem at all. Most of the EWI jobs are over old pebble dash and with fixings only.
Click to expand...



I've worked with EWI before but its either fixing to a flat wall or just finishing it thou they haven't been my own jobs. I'm actually going down to Dublin soon to do a small course and will be getting tested out on my own gaf so they'll give be me a cert to say I'm able to do it properly.

As for this issue, if its OK to do over wet dash then I think I'll have to let the client know this and try and sway them into doing it because if the price will be similar then I'd prefer to do the EWI instead S&C
 
Dry fixing follows the wall. By the time you fix all 5 fixings ,the board will allow the small stones to penetrate the board and make it as tide as possible . Rubbing down the high spots is another way to help you for better finish.Pebble dash is solid back ground and fixing is very good. You can really struggle with old bricks and blocks but pebble dash is hard as f**k, apart from some cases when hollow.If you work for company you must follow the speck no matter how ridiculous looks .
 
vfr12 said:
Dry fixing follows the wall. By the time you fix all 5 fixings ,the board will allow the small stones to penetrate the board and make it as tide as possible . Rubbing down the high spots is another way to help you for better finish.Pebble dash is solid back ground and fixing is very good. You can really struggle with old bricks and blocks but pebble dash is hard as f**k, apart from some cases when hollow.If you work for company you must follow the speck no matter how ridiculous looks .
Click to expand...



I work for myself but will be getting supplied tge EWI of a supplier in Dublin. Was thinking of doing this job before I've signed up with them.
 
Who needs a wetcutter for moasic get some montolit 55w snips
what way would you tackle this.
 
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