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Paint for lime mortared house

 
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genesis



Joined: 19 Oct 2010
Posts: 27
Location: Halfway up a hill near Machynlleth
PostPosted: Sun May 11, 14 2:08 pm    Post subject: Paint for lime mortared house Reply with quote
    

Hi

Ccan anyone help with this query. We have lime mortared the exterior of our house as we have with the insides and also plastered. We now wish to paint the outside and want to maintain the breathability. We want a paint that will last and is breathable. We see sandtex have a breathable paint and were wondering if this is ok to use.Can anyone help advise. We checked out Keim and they were very expensive!!

Cathryn



Joined: 16 Jul 2005
Posts: 19856
Location: Ceredigion
PostPosted: Sun May 11, 14 2:32 pm    Post subject: Reply with quote
    

I am not sure but I think if you are being traditional you should limewash over lime mortar and plaster. I am sure there will be an expert along soon to advise you (this being downsizer after all )

sean
Downsizer Moderator


Joined: 28 Oct 2004
Posts: 42089
Location: North Devon
PostPosted: Sun May 11, 14 2:37 pm    Post subject: Reply with quote
    

I'm not an expert. You could speak to https://www.mikewye.co.uk/ though. They're local to me and they've always been helpful when I've had questions.

earthyvirgo



Joined: 24 Aug 2007
Posts: 7972
Location: creating prints in the loft, Gerlan
PostPosted: Sun May 11, 14 2:55 pm    Post subject: Reply with quote
    

Have a look at these people. South west Wales.
https://www.lime.org.uk/

EV

pollyanna



Joined: 03 Nov 2012
Posts: 221

PostPosted: Sun May 11, 14 3:14 pm    Post subject: Reply with quote
    

www.tlcwestwales.co.uk did our house exterior. Lime wash coloured with earth pigments.

genesis



Joined: 19 Oct 2010
Posts: 27
Location: Halfway up a hill near Machynlleth
PostPosted: Sun May 11, 14 3:35 pm    Post subject: Reply with quote
    

Many thanks. The trouble with lime wash is that it doesnt last long and you have to repaint quite frequently. We washed last and already its starting to wash off - we live in Corris which has to be the wetest place on earth!!

dpack



Joined: 02 Jul 2005
Posts: 38501
Location: yes
PostPosted: Sun May 11, 14 5:45 pm    Post subject: Reply with quote
    

pollyanna wrote:
www.tlcwestwales.co.uk did our house exterior. Lime wash coloured with earth pigments.


the second part of that was what i was going to say

Cathryn



Joined: 16 Jul 2005
Posts: 19856
Location: Ceredigion
PostPosted: Sun May 11, 14 5:57 pm    Post subject: Reply with quote
    

genesis wrote:
Many thanks. The trouble with lime wash is that it doesnt last long and you have to repaint quite frequently. We washed last and already its starting to wash off - we live in Corris which has to be the wetest place on earth!!


A friend of mine has just started to specialise in paint finishes for tricky areas. I don't think it's quite what you are looking for (unless the paint finish you use falls off after a year and you get desperate). I can give you her number if you want - she lives in Talybont near Aberystwyth.

Failing that you could contact the big companies and ask them. We did that, they were very helpful until the expensive paint they recommended fell off within three months, never heard from them again.

(Corris is possibly the wettest place in Wales. I'd ask your neighbours what they've used.)

Gervase



Joined: 17 Nov 2004
Posts: 8655

PostPosted: Sun May 11, 14 6:48 pm    Post subject: Reply with quote
    

Limewash is traditional and breathable, but it needs to be reapplied at least once every three years, which is a pain if you need scaffolding. There are more modern breathable finishes, however. One of the best is Beekosil, a silica-based paint which bonds to the aggregate in the mortar and to stone and brick and which is breathable. It's not cheap, but will last for at least 10 years.
It needs to be used with a primer and the instructions have to be followed to the letter, but if you do that, it's damned good.
It's worth ringing Nigel Jervis at Ty Mawr - the link given by earthyvirgo above - and getting some advice from the horse's mouth. He supplies limewash, pigments, silica paints and anything else you might need for breathable and sustainable building, and is an all-round good egg.

earthyvirgo



Joined: 24 Aug 2007
Posts: 7972
Location: creating prints in the loft, Gerlan
PostPosted: Sun May 11, 14 8:43 pm    Post subject: Reply with quote
    

The other person to talk to is Ned (Scharer) at https://thenaturalbuildingcentre.co.uk/ nr Llanrwst.

There's not much he doesn't know about the subject and a very nice chap to deal with.

EV

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