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Registered Member #3781
Joined: Sat Mar 26 2011, 02:25AM
Location:
Posts: 701
We need to paint our downstairs walls, it's all limestone and they are usually damp from moisture... does anyone have any idea's for paint that would last? would epoxy work?
Registered Member #3414
Joined: Sun Nov 14 2010, 05:05PM
Location: UK
Posts: 4245
You don't want to use a paint that seals it, limestone needs to breathe or it cracks in the cold, so epoxy and gloss paints are no good.
The best thing to use is limewash (whitewash). I'll try and find a link, but it is basically lime and water.
(My parents had all sorts of problems after sealing the limestone walls in their house. I did warn them, but parents never listen....)
EDIT: I found an informative link:
(BTW, Older houses like what I assume yours is are designed for a real fire, this helps to dry out the damp in the limestone, something else that my parents didn't seem to appreciate.)
Registered Member #3781
Joined: Sat Mar 26 2011, 02:25AM
Location:
Posts: 701
thanks! that's just what i was looking for!
EDIT:
Ash Small wrote ...
(BTW, Older houses like what I assume yours is are designed for a real fire, this helps to dry out the damp in the limestone, something else that my parents didn't seem to appreciate.)
Registered Member #103
Joined: Thu Feb 09 2006, 08:16PM
Location: Derby, UK
Posts: 845
Sorry to be off topic, but am I the only one who looked at that pic and thought "that looks like a nice view over some distant mountains, with a cliff in the foreground"
Registered Member #1334
Joined: Tue Feb 19 2008, 04:37PM
Location: Nr. London, UK
Posts: 615
Be aware that lime is pretty evil on the hands. Wear protective gloves else you'll lose your fingerprints...
I speak from experience I re-pointed part of an old lime-mortared wall we have. Didn't notice the damage until about 45 minutes in when blood started seeping through what little was left of my fingertips... Took weeks to heal.
Registered Member #160
Joined: Mon Feb 13 2006, 02:07AM
Location: Melbourne, Australia
Posts: 938
Avalanche wrote ...
Sorry to be off topic, but am I the only one who looked at that pic and thought "that looks like a nice view over some distant mountains, with a cliff in the foreground"
Registered Member #3414
Joined: Sun Nov 14 2010, 05:05PM
Location: UK
Posts: 4245
Maybe I should add that any wall, etc. that was built using lime mortar should NOT be repaired using cement based mortar.
Nicko's points are also valid, but once dry, lime turns to carbonate as it absorbs CO2 from the atmosphere, so it doesn't remain a hazard. Lime based mortar and limewash don't keep indefinitely, for the same reason.
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Painting Limestone
I re-pointed part of an old lime-mortared wall we have. Didn't notice the damage until about 45 minutes in when blood started seeping through what little was left of my fingertips... Took weeks to heal.