External Wall Problem

[Oakland]

Hi Guys

We have an issue in a few small locations on our villa , and would appreciate if any of you have had similar issues and how you overcame the problem .

Basically we have had the same issue in the same place for the past 3 years or more , we have stripped it back and removes the render , used a sealant on the wall , ( sorry we left it open to dry for a few days ) , the re -rendered the wall , allowed to dry , then painted with White External Paint ( Benjamin Moore {Paint ) , which we were advise is the best .

If anyone can advise we would be grateful

Les

[daveg]

Did you use a neutralizer, I believe that helps....
Vinegar based? Mr Google can probably help..

[Jim B]

I had the same problem and spent a small fortune on special paints and treatments but none of them are a permanent fix.
As Lincold said it's salt evervessance and it's due to the poor quality concrete used here.
We got round it by fitting facing bricks one metre high right round the house and that stopped it.

[glang3000]

You could remove the loose render, roughen the smooth wall and tile over it using water proof external adhesive.

Gary.

[Oakland]

Hi Guys

Thanks for the response’s , we will give them a trial

Much appreciated

Les

[kansas]

Our house was Spritzed when built and when it rained the walls absorbed the water like a sponge. We were advised to paint with Benjamin Moore Elastomeric paint, as this keeps all moisture out. Before this I had to roller on a thick coating of an acidic stabiliser (from One stop, as was the paint). Worked perfectly and we've not had a problem in 17 years.

[josef k]

Ever wondered why the really old properties in the UK don't have this problem? The secret is not to use paint. There is no paint that is breathable, despite the adverts, and water build up blows the paint and breaks up the surface. Instead use lime mortar instead of cement mortar or filer, and limewash instead of paint. You can get bags of lime at Paphos Homemarket and other places, and then make up the mortar and limewash yourself. Lots of videos on the internet to show how.

Lime on concrete "wicks" the water in the wall and lets it evaporate into the air, leaving the surface intact. You may still get the bloom from the salts, but this brushes off.

[BOB Peyia]

I had the same problem and spent a small fortune on special paints and treatments but none of them are a permanent fix.
As Lincold said it's salt evervessance and it's due to the poor quality concrete used here.
We got round it by fitting facing bricks one metre high right round the house and that stopped it.

Hello Jim,

Which type of bricks did you use, normal depth or 10mm thins?