Exterior paint advice needed please

[judy]

Had blown cement 1970's render removed from our circa 1830's brick house a couple of years ago, left the brickwork to dry out as it was sodden underneath. Lots of the faces of the bricks were damaged and the window openings have been changed so many times that we decided to have it re-rendered, it was too porous and rain was coming through in places. The plasterer used a lime mix (have asked him to advise the exact proportions of what he used as I can't remember) and did some simple pargetting (just rectangles) but now need to decide on appropriate paint. We've done three sides - the back of the house is still cement render and weathershield paint (running short of funds and the back is not in bad condition.) Asked at our local builders merchant/paint shop and they suggested mineral paint - any views on this or other suggestions? I know we shouldn't use standard paint but that's as far as I know.

One side of the house faces directly onto a churchyard (ground level above the internal floor level) and the other side and front face onto a road - the bottom of section of the render there is a different mix as there's a lot of splash from the tarmac road so that will be painted black.

 

[88v8]

Limewash is a traditional option, very breathable although it needs redoing every few years.
Various suppliers.
https://www.lime-mortars.co.uk/lime/limewash?gclid=CLee_ZDWl9UCFcWdGwodlVoAww

Keim Granital is more permanent, and would be my choice. Follow the instructions carefully.
http://www.keimpaints.co.uk/products/external_paint_systems/granital/

If you are going to avoid a modern white - and of course whites nowadays are quite unlike the yellower whites of old - as usual with a mixed shade, buy enough to do the whole house or future tins may not quite match.

Keim also have a render system. It is no doubt reassuringly expensive.
http://www.keimpaints.co.uk/products/render_systems/

Ivor

 

[paulc]

Keim also have a render system. It is no doubt reassuringly expensive.
http://www.keimpaints.co.uk/products/render_systems/

At £51.60 per 25Kg bag, I'll give that a miss.

 

[steveb]

We used earthborn silicate paint min a very similar situation, very pleased with the result. Not cheap but not silly expensive - but in theory apply once and almost never again.

The theory is that it melds into the substrate but retains it's breathability. You need to use a special primer and dilute the first coat , so follow instructions but they are simple.

-Steve

 

[malcolm]

I had new lime render and old masonry paint and used a couple of coats of Pozilime http://www.ingilby.co.uk/pozilime.html over the masonry paint, then normal limewash on top of that, then just normal limewash on the new lime render. It worked OK, but takes a lot of coats and tends to get everywhere.

Whatever paint needs to be properly breathable as water will always get in through cracks so must be allowed out. The other options above are good too, but be wary of other modern paints that claim to be breathable, are they can be breathable to a much lesser degree.