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How to Set Flagstone in Mortar
How to Set Flagstone in Mortar. Flagstone, sometimes shortened to flag, is a generic term that describes flat slabs of stone. Flagstone is commonly used to pave walkways and patios and to surface fencing. According to Pat Sagui, author of "Landscaping with Stone," mortar is the most common cementing material that flagstones are set into. You do not...
Flagstone, sometimes shortened to flag, is a generic term that describes flat slabs of stone. Flagstone is commonly used to pave walkways and patios and to surface fencing. According to Pat Sagui, author of "Landscaping with Stone," mortar is the most common cementing material that flagstones are set into. You do not need special training or tools to set flagstone into mortar. All that is required is a few spare hours of time and simple supplies.
Things You'll Need
Rag
Wash the flagstones with warm water to remove any debris, and allow them to air dry.
Mix the mortar you are working with per manufacturer's instructions, and pour it into the area where you would like to set the flagstones.
Place a flagstone at one end of the mortar-covered area, and press it down into the mixture. Sink the flagstone into the mortar until there is only a quarter of an inch protruding.
Continue to place flagstones into the mortar in this fashion, fitting the sides of each slab a 1/2 inch to 1 inch away from the previous slab.
Use a rag dipped in warm water to wipe away any mortar that might have gotten onto the tops of the flagstones during the placement process.
Allow the flagstones to set in the mortar for 48 hours before walking on the surface.
Tips & Warnings
According to Mike Lawrence, author of "Step-by-Step Outdoor Stonework," you should observe the weather forecast for the day you plan to set the stones, as well as the two days following. Do not set the stones when there is any chance of rain, snow or high wind. If you do experience such weather, cover the area with plastic sheeting to protect it.
