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My question: I have a residential client with a landing for an entryway that is exposed to the weather. The surface is horizontal masonry random fieldstone on a poured concrete foundation forming the top step. The edge at the step is brick masonry on end. I'm not sure if there is slab. The joints in the stone are fairly large because of the random shape of the stones. The surface has reasonably good pitch away from the home.
The problem is that nearly all the stone has heaved up from water penetrating the joints and the freeze thaw cycles it has been exposed to over the years. I would like to specify the proper mortar and general installation guidance for resetting the stone and re-grouting the joints. Lastly, if there are any maintenance tips I can give the owner (like not using salt) that would be helpful.
Thank you!
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Alexander Gotthelf AIA
Mountain Lakes NJ
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