Render over render

[BrumPlasterer]

Hi,

Been asked to render an area of about 10m2 over existing render. The exisitng render is completely sound, the bloke just don't like the finish. He after a smooth render. It has a couple of corners. I was going to scutch the area for a key, sbr, and 5;1 mix on top. Will this be ok?

Cheers

 

[craigw]

a lot better knocking it off,even down to scratch coat

 

[henry]

Yer why not, are you giving it a one coat wonder. Myself would not bother with sbr kill the suction pva and I dont give a feck what you think LOL

 

[martinemj]

agree with craigw

 

[henry]

if you put sbr in your base coat and leave it to dry you have no suction or very little. You have 3 barrows of gear to mix thats all just put your base coat on and double up same day. If you start knocking on it you may well open up hair line cracks.

 

[BrumPlasterer]

cheers guys.

Would it be ok to put a tight coat of render on top of the painted render? Just a though.

Ta

 

[henry]

well you know brum the render just sags and sits there on painted surface. A cheap way wicks WBA or I have been told sm700 is the dogs . And also it's hollow soundinging over painted surface.

 

[Dirtybill]

Powerwash it and wba and batter it on

 

[spark2010]

you want to put more render on top of an existing.. old render could be up to 25mm, would it take all that weight? just a thought, i'd hack it off

 

[Brek]

I did this a couple of weeks ago and ran my grinder(with stone blade)over the original render to give it a key,pva,tight first coat,then a tight topcoat,went great,done a dusted in the day.

 

[craigw]

bish bash bosh,loads a money :RpS_lol:

 

[nickelarse]

rendaid it. then just top it as normal

 

[S a plastering]

rendaid then weber ocr or cpi

 

[BrumPlasterer]

Ended up meshing it all and going on top of that, worked out ok. Cheers for the input peeps.