External Lime Render

[chippy1]

I;ve never used it but there is another product that has been in use for a long time which provides a durable finish and comes highly recommended by a lot of people - I assume this product does something similar.

Keim is a silicate paint which binds with the lime, its german and has been around for a long time, by all accounts the original forulation is still on some older buildings (tens and tens of years). It remains breathable and basically seems to be pretty nails... Anyone come across this as this is one of the next big projects on my list.... and I;d love someone with first hand experience to chip in!!?

G

GPHOuse,

Just noticed your comment on exterior paint for lime plastered walls on an old cottage and hope you dont mind if I ask a question....

Can silicate paint be applied directly onto old paint? I live in a 300yr old cottage with lime plastered exterior walls. The previous owner used a Farrow & Ball water based exterior masonry many years ago that is still in excellent condition...has bonded well and no bubbling or flaking. As the old paint has bonded so well its impossible to remove so need a long lasting, breathable paint to go over the top. Is the Keim silcate paint you mention a good option to use "over" old paint?

thank you for any help

 

[Flyfisher]

Can silicate paint be applied directly onto old paint? I live in a 300yr old cottage with lime plastered exterior walls. The previous owner used a Farrow & Ball water based exterior masonry many years ago that is still in excellent condition...has bonded well and no bubbling or flaking. As the old paint has bonded so well its impossible to remove so need a long lasting, breathable paint to go over the top. Is the Keim silcate paint you mention a good option to use "over" old paint?

My understanding is that the longevity of silicate paint is mainly due to how it reacts and 'bonds' to the lime render. I'd guess it would cover any existing paint but that it would probably not last as long as it would if applied to bare render. But I'm certainly no expert and this is just from what I've read. I'd suggest calling or emailing Keim and asking them directly. Most manufacturers have some sort of technical helpline - it would be interesting to know what they advise.

 

[chippy1]

Can silicate paint be applied directly onto old paint? I live in a 300yr old cottage with lime plastered exterior walls. The previous owner used a Farrow & Ball water based exterior masonry many years ago that is still in excellent condition...has bonded well and no bubbling or flaking. As the old paint has bonded so well its impossible to remove so need a long lasting, breathable paint to go over the top. Is the Keim silcate paint you mention a good option to use "over" old paint?

My understanding is that the longevity of silicate paint is mainly due to how it reacts and 'bonds' to the lime render. I'd guess it would cover any existing paint but that it would probably not last as long as it would if applied to bare render. But I'm certainly no expert and this is just from what I've read. I'd suggest calling or emailing Keim and asking them directly. Most manufacturers have some sort of technical helpline - it would be interesting to know what they advise.

Thanks Flyfisher....bare render? yes, thats my understanding as well (from what I've read online) Problem is, the original paint(Farrow & Ball water based exterior masonry paint) used on the property has bonded so well that it would be almost impossible to remove and start a fresh so I've been trying to find the best solution to be able to apply a paint directly onto the painted surface. The best option I've found online (but have no experience of) is: http://www.limestuff.co.uk/breathable-paints-limewash/mapei-silancolor-exterior-paint/ OR https://www.keim.com/en-gb/mineral-products/keim-exterior-paints/soldalit/ both mention the option of painting over existing paint and also come with a special primer to help bond the new paint to the pre-painted lime plastered walls but I know absolutely nothing about these things so can only go off the product info!



Thanks again Flyfisher, appreciate your help.