The wall of our patio has cracked in the joint between two overlying stone slabs. Water has run down there and caused a crack in the brick beneath (suspect frost shattering).
What material should I use to seal it so that water doesn't run down and cause more damage? The gap is a maximum of a few mm.
What material should I use to seal it so that water doesn't run down and cause more damage? The gap is a maximum of a few mm.
