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Stonemasonry
Do I need to apply SBR to underside of INDIAN SANDSTONE patio slabs?
Anonymous user 23 February 2024 - 3.31 PM
I plan to put down 100mm type 1 MOT and whacker plate it with a 1:80 fall sloping away from the house, followed by 50mm mortar which will be 4:1 sharp sand to cement, as long as this is all correct, please can someone advice if I actually need to apply SBR to the underside of the INDIAN SANDSTONE slabs prior to laying them on the mortar bed? I've tried looking online but get various answers which also depend of the type of stone used, and some saying it'll be ok if you just wet the underside of the slab with water first which will stop the slab absorbing all the moister out of the mortar . A definitive answer would be much appreciated.
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