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How to Repair Flagstone Walkways
How to Repair Flagstone Walkways. Flagstone is a durable choice of material for a walkway, but as with any material, it can be damaged. It can be cracked by something heavy falling on it, the weather or faulty installation. If that happens, don't panic. Just remove the damaged stone and replace it, add some mortar and secure the new stone in place.
Flagstone is a durable choice of material for a walkway, but as with any material, it can be damaged. It can be cracked by something heavy falling on it, the weather or faulty installation. If that happens, don't panic. Just remove the damaged stone and replace it, add some mortar and secure the new stone in place.
Things You'll Need
Chisel
Hammer
Level
Trowel
Shovel
Mortar
Grout bag
Chip away the mortar surrounding the damaged flagstone with a stone chisel. Point it toward the stone the damaged stone so you don't damage other stones.
Break the stone with a hammer once most of the mortar has been chiseled away. Be careful not to hammer too hard or you could break neighboring stones.
Remove the broken pieces of flagstone. Chisel away any mortar around the hole.
Fit a replacement stone in the hole. If the new stone is too large, mark it and use a hammer and chisel to reduce it to the right size.
Vacuum up any dirt or loose mortar.
Spray some water into the hole to dampen the surface, then shovel in a bed of mortar, using enough to bring the stone level with surrounding stones. Press the new piece of flagstone into the mortar. Use a level to make sure the stone is even with its neighbors. Let the mortar dry overnight.
Mix another batch of mortar and put it in a grout bag. Squeeze the mortar between the joints of the new flagstone, then smooth out the mortar with a trowel. Let it dry for another 24 hours.
Tips & Warnings
Make sure a replacement stone is the right size. If it's too small, it will cause a dip in the walkway.
