Ronda Bradford. Patio. May 22nd , 2017.
If you're looking for a simple solution, then perhaps modular wood deck tiles would work well. These can cope with a certain amount of cracking in the underlying concrete, without being affected. They're easy to install by just clicking them into place. Once laid, they stay firmly in place and don't need any special surface preparation, adhesives or other fixings. They have a plastic base to allow water to pass easily underneath, and to keep the wood away from the sub-surface. You can tile your whole patio area in only an hour or two.
Most of the time, they are not square. Look at a bluestone patio, and stand at one end and look at the lines of the joints. They should be straight and even. Yet because bluestone is not always cut properly at the quarry, the pieces are not exactly straight. If used as is, your joint lines will not be straight either.
Perhaps the concrete is basically sound, but has a few hairline cracks. In that case you can lay porcelain or stone tiles over the top, to give an elegant finish to your patio. It's a good idea to use tiles with a textured finish, to reduce the risk of slipping when the tiles are wet. You can use other materials such as sandstone, limestone, granite or slate, as long as they are properly sealed. If you often have freezing conditions over winter, then ensure the tiles don't absorb high levels of water, or they might crack. Be aware, too, that existing cracks in the concrete may expand and cause the tiles on top to crack as well.
Problems with Patterned Bluestone: The pieces of bluestone when rectilinear should be perfectly \"square\", meaning that the stone form a perfect square. If you fit two together, they would meet perfectly and all lines would be straight. That is in a perfect world, of course!
Finally, after laying out a 1 inch conduit pipe on both edges, fill the area with paver base and by means of the pipes as a guide begin the screeding (or leveling) process using a long board. The conduits will later be removed and the trenches left behind filled in with sand.
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