Introduction
If you are planning to install a new in-ground pool, consider a deck surround as an elegant alternative to flagstones or other masonry materials. Decking for an in-ground pool could cover the entire perimeter. But you can combine materials so people have their choice of wood or masonry to walk or lounge on. On hot days, a light-colored tile can provide a cool spot, while on most days people will prefer the warmth of natural wood.
If you have an existing pool surrounded by an aging concrete platform, a new deck surround can be built directly on top of the concrete, as long as it is still basically strong. If the concrete is loose and unstable, however, hire a contractor to remove it-not as big a job as it may sound, but one that requires heavy-duty trucks and strong backs.
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Custom-fitting deck to the pool shape
If there is no existing concrete surface, build right up to the edge of the pool by extending joists along the perimeter, then cutting the decking to fit the pool shape perfectly. If the area around the pool is open ground, use standard footings and piers to support the deck surround.
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Placing decking over concrete
You can place a deck right on top of a existing concrete surround. The concrete can serve as the foundation as long as it is in relatively sound condition. Install pressure-treated 2x4 or 2x3 sleepers on the patio. Space them like joists on a regular deck, and fasten them to the concrete using masonry screws. Drill pilot holes through the sleepers, then mark for the locations of the holes in the concrete. Drill the holes with a masonry bit, reposition the sleeper, and drive in the masonry screws. You'll need a heavy-duty drill and extra masonry bits. Use short sleepers to snake along irregularly shaped edges. Leave gaps between the sleepers along the perimeter to facilitate drainage. Use pressure-treated shims to fill in low spots between the sleepers and concrete.
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