Correct procedure for flagstone installation
- The area is first marked out and then excavated approximately 11 inches.
- Approximately 7 inches of ¾ inch crushed limestone base material is installed into the excavated area, compacting every 2 inches to ensure stability.
- Then approximately 1 - 1½ inches of fine crushed limestone (screening) or sand is installed as a levelling base.
- The interlock stone is installed onto the levelling base once the grade has been set (always ensuring to slope away from the house approximately 1/8 inch slope to every 1 linear foot).
- After all the stone is installed and all the cuts are made, an edging system is installed around the perimeter of the project to prevent the stone from pushing outwards.
- The new interlock area is compacted to level and stabilize the stone.
- Finally, polymeric sand is swept into the stone joints to prevent weeds and insects. The area is lightly hosed to harden the sand.
For example, if we were to install an interlock project for pedestrian traffic only onto a clay foundation, the steps are as follows:
Note: It is very important to excavate to the correct depth and compact the base every 2 inches in order to ensure no sinkage.
Winner Home Stars Best of 2017 & 2019
Flagstone - Front Steps & Porch
"Words cannot express how happy we were with the work done by Highbury Stone & Repair, specifically the hard work and dedication shown by Ryan. He went over and beyond what was expected of him. His..." - Ivan C from Hamilton - Hamilton, ON - 6 years, 11 months ago
Front walkway, steps, and porch stonework plus driveway relay
"The job involved removal of old steps, pouring a concrete Base for the new steps and walkway, then installing new steps plus Banas flagstone on our porch and walkway. They lifted our current..." - Doug - Calgary, AB - 8 years, 11 months ago