render fireplace

[dibley2011]

hi I am rendering a fire place and 75% of render is good just got one bit that does not want to stick so I scraped it off left a couple days and then put pva on waited till it went tacky but after 30 mins render still fell off not pva has gone off the wall is sealed can anyone help cheers wayne

 

[Marshy]

I'd have thoroughly scrubbed the substrate and defo not used pva at any stage !? Use rib lath etc 2 coat sand cement with sbr ? Altho the fire instalers at house said use K rend as it's "properties " make it more multi burner friendly ?

 

[dibley2011]

I'd have thoroughly scrubbed the substrate and defo not used pva at any stage !? Use rib lath etc 2 coat sand cement with sbr ? Altho the fire instalers at house said use K rend as it's "properties " make it more multi burner friendly ?

at first the render wasn't sticking to scratch coat which baffled me so I scraped of the scratch that's why I pva'ed it now Im thinking I will have chip away at it to start fresh again . I had sbr in scratch coat and in mix to begin with and sbr in top coat I don't know whats goin on

 

[kgreigh]

I'd have thoroughly scrubbed the substrate and defo not used pva at any stage !? Use rib lath etc 2 coat sand cement with sbr ? Altho the fire instalers at house said use K rend as it's "properties " make it more multi burner friendly ?

Heard this beforeabout k rend,is it k rend or can you use any mono in general marshy?

 

[johniosaif]

He knows didley

 

[Marshy]

Heard this beforeabout k rend,is it k rend or can you use any mono in general marshy?

Our fire installer twisted fire installer said k rend as its silicone based not cement ?? I dont get it am only saying what he and a few others have said who install wood/multiburners ??

 

[Marshy]

at first the render wasn't sticking to scratch coat which baffled me so I scraped of the scratch that's why I pva'ed it now Im thinking I will have chip away at it to start fresh again . I had sbr in scratch coat and in mix to begin with and sbr in top coat I don't know whats goin on

Scratch it again use eml orrib lath if sooted walls are a problem then k rend it the silicone based stuff. According to installers its the best gear ?? I dont get it but ive done a few for customers and never had a cal back ?? So go knows ??

 

[TheWand]

PVA..................OMG............WTF................LMFAO...................another chancer

 

[Jgreenplastering]

Send a pic of the background area your on about. That will help a lot.

 

[Jgreenplastering]

Or just put a SBR Slurry on that section if rest is fine and then render up again before it's gone dry