Dylux Weathershield - how many coats

[roofmog]

I've just finished painting the pebbledash rendering of my house with Dulux Weathershield. The instructions recommend 2 coats, which is what I have given it, but the first coat was thinned by about 20% as the original surface was very porous. Can I include this as one of the coats or does it require a third coat. It looks fine and I don't really want to do it again if I don't need to as it takes two days and costs about £100 in paint. On the other hand I want to be sure it has been done correctly.

 

[Growler]

If it looks fine as you say, then there's no point in wasting more time and money on it.
Did a new render a short while ago with Dulux weathershield in 2 coats. It covered excellent but I have the practice of applying a good coat..(I don't skimp).

 

[jondecs]

I gree with growler ...

It says on tin anyway that on sound prev coated, one coat should suffice..

or used to

 

[LJW61]

You dont need to thin exterior paint such as Weathershield as you would interior emulsion. if you have you'll probably need more than two coats

 

[roofmog]

Looking at the long range forecast, I think the weather is going to have the deciding vote on this one.

 

[LJW61]

HeHe..you could be right..Thank God Sept was dry , I got all my exterior contracts sorted out in the last 4 weeks

 

[wallcoatingsbloke]

I've just finished painting the pebbledash rendering of my house with Dulux Weathershield. The instructions recommend 2 coats, which is what I have given it, but the first coat was thinned by about 20% as the original surface was very porous. Can I include this as one of the coats or does it require a third coat. It looks fine and I don't really want to do it again if I don't need to as it takes two days and costs about £100 in paint. On the other hand I want to be sure it has been done correctly.

the amount of exterior paint you need to paint a house depends on how textured the exterior wall surface is, so 20m2 of smooth render is a LOT less than 20 m2 of pebbledash which with all its bumps, pits, holes and sharp edges, works out a lot more if you see my point.

personally i would have treated the whole wall area 1st with a cement wash, known in the wall coating trade as "bagging" (no idea why though ) which , if you mix unibond in with it, covers the small holes, plus ensures the stones stay stuck to the wall.

Then 2 good coats of exterior masonry paint and you should be away, but if you have already painted theres not much you can do, but i would use THREE coats on it, not 2.

 

[Dario]

You can thin the paint if is very hot and the surface is rough

 

[wallcoatingsbloke]

You can thin the paint if is very hot and the surface is rough

yes, after about 6 coats of paint!!!!!!!!!

If the wall is NOT prepared correctly, you will be there forever and the finished job will ultimately look cr**, sorry!!!!!!!!

 

[Dario]

No not 6 coats. 2 coats with 10% of water, that what information saying on the tins.

 

[roofmog]

Eventually did 3 coats with the first thinned by 20%. Looked OK with 2 coats, but the third made it look even better. Now I'm just waiting for the scaffolding to be removed so I can see the full effect.