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I’ve just hit the mother lode of free sandstone and flagstone due to some road construction near my home. The dump driver dropped about 30 tons of clean stone on my property, and I’m planning on using the sandstone for a retaining wall, and the flagstone (about 2 inches thick, nearly perfectly flat) to replace the badly cracked concrete sidewalks around my house.
My question is this: What type of mortar should I use for each? I’ve heard that using the wrong type of mortar with sandstone will reduce the life of the stone because the mortar and stone have different expansion characteristics. Is this true? Does the same hold for flagstone? I’d also like to use the flagstone to face a fireplace in my living room.
Hutch
Replies
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I've just hit the mother lode of free sandstone and flagstone due to some road construction near my home. The dump driver dropped about 30 tons of clean stone on my property, and I'm planning on using the sandstone for a retaining wall, and the flagstone (about 2 inches thick, nearly perfectly flat) to replace the badly cracked concrete sidewalks around my house.
My question is this: What type of mortar should I use for each? I've heard that using the wrong type of mortar with sandstone will reduce the life of the stone because the mortar and stone have different expansion characteristics. Is this true? Does the same hold for flagstone? I'd also like to use the flagstone to face a fireplace in my living room.
Hutch