WBA or PVA ?

[filthyturk]

Hi, has anyone skimmed/bonded over painted internal roughcast Walls? Should I Use bonding agent or PVA?

 

[joe-90]

Due to grip surface area you'd probably get by with PVA, but technically WBA would be better.

 

[filthyturk]

Thanks for that. I know it'll be more cost, but hey ho, peace of mind and all that.

 

[Micilin]

As joe says, you may have enough of a physical key anyway. I would advise making sure any loose stuff is taken off first, and you may have a couple of high spots that need taking back.

Suction is more of an issue if you have a good existing key

 

[filthyturk]

gonna give the walls the once over with a floor scraper, then probably get some wickes stuff. Ive heard blue grit and plasprime are pretty good and work out about £5 dearer than wickes stuff. The thistle stuff ive seen for £50 a tub, so bit too pricey

 

[roughcaster]

Are you doing this job yourself FTurk, or you getting someone in?

 

[dmplastering]

gonna give the walls the once over with a floor scraper, then probably get some wickes stuff. Ive heard blue grit and plasprime are pretty good and work out about £5 dearer than wickes stuff. The thistle stuff ive seen for £50 a tub, so bit too pricey

Think I seen in the latest tradepoint catalogue that bond it was around the £37 mark. Not too bad but WBA still a lot cheaper

 

[filthyturk]

Are you doing this job yourself FTurk, or you getting someone in?

Be doing it myself. Have 3 bedrooms to do, one has wallpaper but I can only assume that will be the same finish when I strip it off. I have looked into the WBA V PVA question and find more people use bonding agent and say it ultimately gives a better base, less cracking, more chance of staying on etc. I do realise that it is used mainly for iffy backgrounds, but as a novice, I think I would prefer to use it even though it will cost more IMHO. I also have a hell of a lot of artex ceilings to do and am looking into overboarding costs V buying a load of bondong agent.