Patio movement/frost question again..

Patio flagstones (slabs), concrete flags, stone flags including yorkstone and imported flagstones.
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worz
Posts: 6
Joined: Mon Aug 04, 2008 12:15 pm
Location: London

Post: # 59940Post worz

Hi all,

I have read a few posts that have similar problems to mine, but I would like to double check what to do, so sorry for repeating others...

I layed a Travertine patio 2 summers ago now. Put down a decent compacted sub base of type 1 then layed the whole lot on a mortar base. I butted all the flags against eachother in a random pattern.
After the frost this year and last I would say 90% of the patio is now loose. If I go out and walk on them now there is a little movement, I can hear them all moving against eachother as I walk. Most of them quieten down after walking on them a bit and a few of the worst ones I have lifted, releveled and replaced.
I dont want to have to do this every year, so what can I do?
I take it that this is due to water between the cracks and through the porous slabs expanding with the frost? Would sealing them help

Many thaks in advance.

worz

lutonlagerlout
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Joined: Fri Aug 04, 2006 12:20 am
Location: bedfordshire

Post: # 59969Post lutonlagerlout

worz butt jointing on the whole is a fail
most (95%) of slabs/flags need to be pointed
what gave you the idea to butt joint them?
LLL ???
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worz
Posts: 6
Joined: Mon Aug 04, 2008 12:15 pm
Location: London

Post: # 59981Post worz

hmm thats a very good question and now i think about it i have no idea, I guess it was the only way i could see that the random pattern with different sizes slabs would fit together and look good :(

So bearing in mind i have screwed up, any suggestions?

Cheers
worz

Dave_L
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Location: Somerset
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Post: # 59990Post Dave_L

Lift and relay - there's no easy way to say it Worz.
RW Gale Ltd - Civils & Surfacing Contractors based in Somerset

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Bob_A
Posts: 861
Joined: Wed Feb 27, 2008 9:30 pm
Location: SE London/ NW Kent

Post: # 60003Post Bob_A

Even if they weren't butt jointed 90% is a lot to patch up.
Why not relay but get Tony to do you a design
http://www.pavingexpert.com/design.htm#form

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