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Mortar-Set Flagstone Patio on Soil Base: Not Recommended

Mortar-set flagstone on a gravel base will crack with freeze-thaw or moisture cycles. A concrete slab base is far more durable. The cost of proper gravel prep often equals a slab. Consult patio books at Home Depot or bookstores for slab-based methods.

Landscaping and Design: Flagstone Walkway Thickness and Sourcing for a 200-sq-ft Path; Flagstone Path in New England Snow: Installation for Snowblower Durability; Walkway Material for White Brick Ranch: Brick or Flagstone, Not Pavers; Flagstone Waterfall Construction: EPDM Liner Is Mandatory; Repairing Deteriorated Mortar Between Landscape Bricks; Repurposing Uneven Slate from Plant Beds into a Patio; Dry-Set Flagstone Walkway: Joint Material for Freeze-Thaw Climates; Troubleshooting Mortar Joint Separation in a Flagstone Walkway Over Concrete; Installing Flagstone Over an Existing Concrete Patio: Materials, Methods, and Pro Tips; How to Install Flagstone Over an Existing Concrete Walkway

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