Natural Cleft PA Flagstone (Bluestone) – The subtle blends of naturally occurring color variations and uniquely attractive natural cleft texture are what give PA flagstone (bluestone) its appealing, old-world charm, combined with the strength and unmatched durability of natural quartzite sandstone. Our paving products are provided in a natural cleft texture that is practically non-slip, but yet easily accommodates furniture, foot traffic, wear and tear.
Thicknesses vary with the natural cleft paving material. These variations are common in natural split-faced stone. The average 1/2″ thick natural cleft stone varies from approximately 3/8″ to 3/4″. The average 1″ thick natural cleft stone varies from approximately 3/4″ to 1 1/4″. The average 1 1/2″ thick natural cleft stone varies from approximately 1 1/4″ to 2 1/4″.
Generally, for residential installations, the average 1″ thick natural cleft paving is installed in a mortar bed on top of a poured concrete slab. The joints between the stones are then pointed with a specific mortar mix. The average 1 1/2″ thick natural cleft paving is installed in a dry-pack on top of crushed stone, and the joints can be swept with sand or grit. Polymeric sand is also an option some people choose to sweep between the joints of their dry-set patios. Read all manufacturers instructions if using the polymeric sand, it can leave a residue on the bluestone which has to be cleaned with an acid wash. Feel free to call the office with any installation questions you may have.