Render Job

[pristineplastering]

Was asked to quote for a 're-render' job today and was after some advice on how best to prep the wall - Basically a jobbing builder has told the customer he can render their driveway wall and in a nutshell, he cant - He's left trowel lines all over the shop and it looks bloody awful

Its now been painted aswell to make matters more interesting - Can I just put a scratch coat straight onto it or do I need to prep it with anything frst ??

Any advice greatly appreciated - not due to start until March when hopefully the weather warms up

 

[christ]

i would hack it all off and start again buddy.

 

[andy66]

take paint off then rendaid

 

[pristineplastering]

Bah, was hoping not to have to remove the paint ? Is there anyway I can get round it or is it best to remove it all and start afresh ??

 

[spunkybum]

handyman would advise a sbr slurry mesh scratch coat and top coat ;D

 

[pristineplastering]

Woss SBR Spunkybum ??

 

[spunkybum]

smethylboomringrang render wash you can get it at most stockists

 

[merlin]

same as troweladdict m8 best to chop off

 

[spunkybum]

sorry mate .....not sure what it stands for it's an external waterproofer /bonding agent ......all i know is if you use it and put a w/proof scratch coat on when you rule the top coat off it sticks to your straight edge not the wall

 

[kitingplasterer]

could you get an angle grinder on it to give a decent key???

 

[spunkybum]

when rendering over paint is it the render that pulls the paint off or just a lack of key ?

 

[limey]

If the rendering has a poor finish,there is a fair chance that it ain't stuck to the background too well,so my advice would be to get yerself a sharp bolster chisel and hack it all off.
You'd be surprised how easy it comes off and its a job you can do on a rainy/cold day!

 

[spunkybum]

http://www.brandontoolhire.co.uk/directory/prodview.asp?idproduct=450.........sorted it says it leaves a key so you might be able to one coat it ???......or rend aid and start all over again
search for hand scabbler links rubbish

 

[steve1976]

You would need to get it cherry picked ie hammer and bolster or scutching hammer to give it a key first ( it a c##t of a job to do) i would try and get them to do it, then when thats done i would give it a slurry coat( throw some pva in this aswell ) leave a few days then scratch then top coat.

 

[iain_flanagan]

chop it off and start again instead of messing about hacking

 

[pristineplastering]

Cheers lads, all advice much appreciated

 

[Gibbo]

you can renaid as long as the render is sound it goes straight over painted surfaces no probs

 

[spunkybum]

where did you hear that from grand?