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Pavers over concrete slab/patio and drainage
I've seen a couple threads on this but I don't think any specific to my situation. Here goes.
Area is roughly 40X16 extending from house to inground pool deck. There is an existing 12X12 concrete pad in the middle of the area (right now a 20X16 deck exists above the concrete pad, will soon be gone.. has been there for 10 years).
Concrete pad has the required slope for draining and is in excellent shape.
The concrete pad is approx 10 inches below the final grade of the paver to meet the existing pool deck (with required slope). So there will be base material on top of the concrete. Attaching to the pad is not possible.. Nor is removal (sorry)
Questions:
1) I have read that it is ok to go over the concrete pad.. but have also been reading of base washing out from the water run off on the pad. With 6+ inches of base material over the pad will this be an issue?
2) Should I bury a drain pipe at the end of the pad ? There will be approx 3 feet between the end of the pad and the beginning of the pool deck.
3) Should I be careful to have the pavers match the form of the pad, or should I try and have then span concrete base - non-concrete base?
4) Should the membrane cover the concrete as well. Had heard a suggestion of perhaps putting a 2 inch compacted layer down, then the membrane over the whole thing.. then the final 4+ inches of base ?
Right now the stairs were planned to be left-right and not the traditional str8 down .. but if they were to be str8 out and down it would take up more of the concrete pad and thus leave more of the pavers on virgin earth.
Escavation is almost complete.. So , final planning is getting underway.
Any opinions would be appreciated.
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