Painting exterior pebbledash

[Robson]

Hi all
Have been asked to paint a new pebbledash wall. Would the correct process be to:-

1. seal the wall with a water based primer/sealer
2. Thin down paint 20% (sandtex exterior)
3. Top coat

Any idea if I can use a roller if so what is goog for pebbledash?

Thanks guys
Rob

 

[Third_Eye]

Has it already been painted before ?

 

[Robson]

No this is its first coat. On looking at the wall the stones are very loose. Was thinking about spraying the sealer as its quite thin?

 

[Third_Eye]

Me personally would buy Leyland Pliolite Based Masonry Paint.

Thin down first coat by 15% with white spirit, then apply.

Then apply second coat neat/unthinned.......

 

[Robson]

Yeah, my only concern is the amount of stones that will fall off if i roll or brush it without a stabilizer? Was going to use this to bond stones to the wall.
I thought dulux weathershield was a good exterior paint?
Thanks again
Rob

 

[Robson]

Now im really confused!!!
With the stones quite loose on the new pebbledash wall most people i talk to say to put a stabilizer on first to stop the stones falling off even more. I was going to spray this as its so thin. Then two full coats.
Others have said dont use stabilizer just use two coats of pliolite masonary paint (first one thinned 15%). My worry is using a roller or brush on the loose stones. I can see them falling off and making a right mess!
HELP!!!!!!
Cheers
Rob

 

[Third_Eye]

Hence why i recomended Pliolite to you.

Pliolite works as an Stabilizer when thinned down by 15% with White Spirit on the First Coat.

Dont worry about some pebbles coming off whilst painting. This is normal.

 

[Growler]

Robson:
I would mainly do what you were planning on doing in you're particular circumstance.
Get a soft kitchen sweeping brush and brush the walls first, then spray on you're stabilizer and if it's the right kind of day and you have the time, give it another quick flash over with the spray to bond the dash.

I'm not a fan of pliolite stuff but some are so I would use Johnstone's smooth water based stormshield....I would not thin it as you'll be all year trying to cover it ......and I'd apply 2 good thick coats with a roller.

You'll still have a certain amount of stones flying off but nothing like the amount that you'd have if you didn't stabilize it.

Soft brush first and sheet up well on a calm day

 

[Zampa]

Stabilsing needs to soak into somethine..it wont absorb into stones (pebbles)

The only way round this (according to the manufacturers) is to thin the stabiliser by about 50%...then its going to be murder to apply..one of those garden sprayer thing might do it...but youl need to cover up completly..youl be ating the stuff!

Id go for a thinned out coat of pliolite then whatever it take to cover.

 

[Robson]

Thanks Zampa
That was my worry. I dont want the stabilizer running down the walls as i spray. Again though my worry even with pliolite is the application methed. Both roller and brush will remove alot of the pebbles but i guess thats just what happens?

 

[Zampa]

Yep..the suction from them as your painting causes that..but as growler said give em a good brush over with a stiff broom first.