. . . laying the paving
Now that the sand bed is ready for use, you are ready to lay the bricks or other units. The secret of success in laying paving is to be found in the constant tamping and careful fitting of the units, and in the frequent checks of the levelness of the paving. Keep your level, a short board about 1X4X36 inches, and your heaviest hammer always at hand. It is possible to use the board and hammer to tamp an entire row of bricks 3 inches wide, to set them. Never hit the paving material directly with the hammer or you may damage it by cracking, chipping, or gouging it. Use the board and hammer also in front of a row of units to tamp it back firmly against the previous row. If you are laying paving in hot weather, don't just leave it when you must stop in the middle for the day. Always dampen the sand base with a hose, again using a fine spray to prevent dislodging the sand which has been leveled. This will keep the sand in place and moist, so that it can be slightly dampened the following day and the next lot of units laid on it.

. . . finishing touches
After all the units have been laid, place a shovelful of sand here and there on the surface of the paving and then sweep it across so that the sand fills in the cracks of the joints between units. You will find that dry sand sweeps better and will fill more compactly; and, if the cracks are well filled, there will be less shifting and settling in the future. After all the cracks are filled, use a hose with a gentle spray to wash more sand into the cracks and to settle what is already there. Then, when it has dried, sweep up the excess sand and remove it. Occasionally, for a year or so, you may want to put on some more sand and repeat this process to prevent soil from settling and filling up the cracks, which would permit weeds and grass to take root.