Hello, I am paving a 5 x 5 metre patio with 600mm x 400mm x 40mm concrete paving slabs. The original garden has been excavated to a depth of 900mm in some areas so I have built a Tobermore retaining wall around the area and the patio will have Aco brickslot drain at the threshold to discharge rainwater into the gully. As the levels are at present, I can accommodate a 50mm sub base, 30mm paving sand bedding layer and then the 40mm slabs. The earth is already extremely well compacted and has had some pea gravel over it acting as a mud matt for the last year plus whilst building work was underway. During the winter rains there was no signs of water pooling on the area. I would like to know if the 50 sub base and 30 bedding layer would be sufficient to hold the paving or should I excavate more. Any advice appreciated. Thank you!
Minimum sub base and sand bedding depth for patio paving slabs.
- Thread starter Nialle
- Start date
For pedestrian use yes, as long as no growing matter (dark) remains and you use a solid bed mortar for the slabs.
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