I live in a 200 year old sandstone house. Some of the stone is beginning to
weather badly in places and I find little piles of sand at the bottom of the
wall as my house is, literally, blowing away, The walls are about 4 feet
thick so it is not going to fall down - but it does not look good.
Suggestions please for stabilising the stone work to stop it blowing away -
the only obvious products in the diy shop are waterproof PVA and Dulux
weathershield primer, would any of them work?
We used this stuff http://www.decoratingdirect.co.uk/viewprod/t/TORSPNSS/ ,
recommended by a builder friend, for around our windows and doors, because
they seemed to be the worst affected areas on our building. Seems to do the
trick, as after five or six years after "liberally" applying it, the
stonework still sheds water like a plastic raincoat.
I'm told it will need doing again in about two or three years, but if it
save the hassle of repairing or replacing the stone, then I'm happy to do
Good luck with it
The house was built in pale red sandstone c.1806 and extended in slightly
paler stone about 50 years later. It is not as red as a lot of the local
building (most of it later built than ours) but I would not call it blonde.
The wall facing southwest has already been completely rendered (over the old
part) with a cement mix at some time in the past. I'm in the west of
scotland so the weather is persistent from that direction. The other walls
are weathering at various rates and even some of the blocks are weathering
at different rates from others. Another phenomena is the tendency of some of
the stones to get dirty whilst others do not and it is hard to figure a
reason for that. It is hard to deal with that, of course, because sometimes
I think the dirt is holding the blocks together and cleaning would just
accelerate the erosion.
The front of the house still has some nice features so it is worth trying to
keep the original stone as good as possible. If it did have to be rendered I
cannot imagine how you would go about it , either with the corinthian
columns (of which there are two) or any of the other rounded twiddly bits.
I'll do my best with trying to look after the original stuff.
Looking at west of Scotland tenement properties, I've not seen red
sandstone go as badly as you describe but it's typical of the failure
mode of blonde (or yellow) sandstone there. You've got an extra hundred
years of wear on most city tenements of course but still it does seem
The quick fix normally applied to blonde tenement stuff appears to be a
sand/cement coat to bring the surface back flush with coloured sand
blinding to make it look like sandstone again but I've always viewed it
as a bit of a bodge so was going to suggest avoiding that technique at
Stabilising the surface seems like a good idea but I'm not sure what
would be appropriate. Silicone type waterproofing (as already suggested)
may do the job if it's a case of frost related damage but could cause
problems with other kinds of fix if that is not the problem.
An experienced stonemason may be the person to give you advice with at
least payment for his time spent looking if you're not going use him to
apply the proposed fix.
BBC3, ITV2/3/4, channels going to the DOGs
I know someone in the Cheshire area who owned a house built approx 1860
approx 1/3rd of the front of the property's sandstone blocks were badly
weathered (due to it being very exposed on that side of the house.
He had a mason (not the dodgy handshake type!) come in and reface the
damaged sandstone blocks, he said it didn't cost as much as he thought it
might do and the match is very good, the new blocks were 'weathered in'
around their edges and the colour spot on.
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