Stone slabs - Laying slabs on top of concrete slabs

Patio flagstones (slabs), concrete flags, stone flags including yorkstone and imported flagstones.
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Chrisart
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Joined: Thu Nov 16, 2017 2:41 pm
Location: Scottish Borders

Post: # 114985Post Chrisart

I want to lay sandstone slabs on top of existing concrete slabs. Is this advisable - I've heard there can be drainage issues - and should the existing concrete slabs be scarified for better adhesion of the mortar? It's a small area - 7ft x 8ft - and I thought I would just use a builders sand-cement mortar. Will this work???
Thanks.
Chris

Ah! I've just found the relevant page on the site that deals pretty much with this issue, although any helpful suggestions still gatefully received!
DIY artman
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Tony McC
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Post: # 115037Post Tony McC

....and did you also find the bit about NOT using builders' sand with cement to make the bedding mortar?
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Chrisart
Posts: 2
Joined: Thu Nov 16, 2017 2:41 pm
Location: Scottish Borders

Post: # 115062Post Chrisart

Thanks - yes! It's all done now and seems fine; rock solid.
DIY artman
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