Flaking paint on a 2 year old wall

Gun Monkey

An exterior wall which was painted for the first time about 2 years ago has now got severe flaking and peeling paint all around the house. The house was built about a year before painting. It was not primed before painting, the wall seemed clean with no sign of any residue, dust or bad plaster so we thought it would be ok to just paint with dulux exterior emulsion. It will obviously need to be power hosed to remove any loose paint and i intend to let it dry for a week or so before trying to paint again.
Any suggestions on how to deal with this and get fresh paint to stick without anymore peeling in future?

TopTec

What sort of wall, render? block? stone? lime? concrete?

The instructions on the weathershield containers carry the best advice whether you need to use a stabilising solution, a primer, a weak wash coat or whether the paint is suitable for your surface. Follow the instructions and you should be dandy.

I suspect the first paint job wasn't done correctly.

TT

Gun Monkey

TopTec wrote: »

What sort of wall, render? block? stone? lime? concrete?

The instructions on the weathershield containers carry the best advice whether you need to use a stabilising solution, a primer, a weak wash coat or whether the paint is suitable for your surface. Follow the instructions and you should be dandy.

I suspect the first paint job wasn't done correctly.

TT

Thanks for the response, its a normal house wall, concrete blocks that have been plastered over. The finish seemed sound before painting, no visible residue or obviously bad plaster. It was at least a year between the wall being plastered and painted.I painted it myself and while I'm not a painter by trade have painted many walls over the years and not had this issue before.

TopTec

I've just read the product information for new and bare surfaces which include a newly rendered finish. They say such surfaces should be primed with a 5 parts paint to 1 part clean water and allowed to dry. (I have always known this as a wash coat). This seals the new surface and provides a key for subsequent paint layers. Then 2 coats of weather shield will be required.

In your case I would power wash all the flaky stuff off. Dry. Wash coat/prime the wall as above, dry and then 2 coats of Weathershield.

A pain, but this should do the job. I have painted several properties in this way and never had a problem.

TT

Gun Monkey

Thanks for the info. I wonder is there any need for a stir in primer like owatrol eb or similar? I'd hate to go to the trouble and expense of repainting and then have it happen again? Are these stir in primers necessary and which one is the best value? That owatrol eb is pretty expensive.

TopTec

I am not a paint expert but I always understood that something like Owatrol was for surfaces that were old, chalky or unstable. None of which applies to your wall.

I have used a separate stabilising solution for walls or render in poor condition but I wouldn't add anything to a paint like Weathershield or Colourtrend. In your case it is not necessary anyway. Just follow the Dulux recommendations.

Looks like you went wrong at first paint by not using a wash coat on the new render to seal it. Not a big deal just carry on as described above.

TT

Safehands

Gun Monkey wrote: »

An exterior wall which was painted for the first time about 2 years ago has now got severe flaking and peeling paint all around the house. The house was built about a year before painting. It was not primed before painting, the wall seemed clean with no sign of any residue, dust or bad plaster so we thought it would be ok to just paint with dulux exterior emulsion. It will obviously need to be power hosed to remove any loose paint and i intend to let it dry for a week or so before trying to paint again.
Any suggestions on how to deal with this and get fresh paint to stick without anymore peeling in future?

What time of year did you paint it. Was the render wet?

Gun Monkey

Safehands wrote: »

What time of year did you paint it. Was the render wet?

Thanks for the reply. It was painted in summer, the wall was bone dry and had been dry with no rain for nearly a week beforehand (i planned it that way, i waited and waited and waited for a good dry spell!)