I’m installing backyard pavers on rocky ground in a cold-winter area. I’ve dug down 3 to 4 inches and compacted the soil. My plan is fabric, an inch of gravel, an inch of tamped sand, Brock paver base panels, pavers, edging, then joint sand. Am I layering this correctly, and how should I handle drainage?
Does this paver base plan look right?
Asked by Fennel 8
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I wouldn’t combine a conventional gravel base with the panel system without checking the panel instructions first. These panels are meant to replace much of the usual aggregate base, and the recommended bedding layer and thickness can be specific to the product. In particular, don’t assume the sand should be tamped before laying the panels.
Use the manufacturer’s assembly for your exact panel, including what it says about fabric, sand, and the subgrade. Then keep the pavers and perimeter edging installed as directed, and sweep joint sand in at the end.
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Drainage and the finished height deserve as much attention as the layer recipe. Set a consistent slope away from the house, often around a quarter inch per foot, and check it with a string line or level as you work. Make sure runoff won’t be sent somewhere it can cause another problem.
Three to four inches of excavation may or may not be enough. Soil, local freeze conditions, and how the patio will be used all matter. For a panel system, compare your available depth with its installation requirements rather than assuming the same excavation depth as a traditional gravel base.
Sonderline:
Should I set the slope in the soil, or in the layers above it?
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The list mixes two different approaches: a compacted aggregate base and a panel base. Pick one installation system and follow it all the way through instead of stacking extra layers just because the ground is rocky. If the soil is uneven, get it stable and reasonably smooth before the bedding layer, while keeping the drainage grade.
Also, I’d be cautious about a full inch of loose sand under the pavers unless that’s what your panel instructions specify. Too much or uneven bedding can make it harder to get a consistent surface.
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On the fabric question, there isn’t one answer that fits every soil and product. Some instructions call for a separator fabric, while others may not. Use the specified material if the panel manufacturer requires one, and don’t treat ordinary weed cloth and stabilization geotextile as automatically interchangeable.
Once the pavers are laid, secure the edge restraint and finish the joints with the sand recommended for your pavers. Take time checking the grade before the panels go down. Fixing a low spot later is a pain.
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Fennel 8:
So the rocky soil alone isn’t a reason to add gravel under the panels if the instructions don’t call for it?