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May 25, 2012, 4:09 pm Yahoo!7
Here are the five basic steps to laying your own paving. For this project, we used timber edging (45 x 70mm H4-treated pine) but you can install a concrete haunch after the paving is laid if you prefer.
Before you start: Do a little planning and consider the following aspects of the job so everything runs smoothly:
Edging: It’s important that paved areas are secured around the edges so the pavers don’t shift and sag over time. For square or rectangular shaped areas such as patios, this can be done using H4-treated timber boards or sleepers. Just lay them out, screw together at the corners and hold in place with hardwood pegs. Alternatively, you can lay pavers without an edging and install a border of concrete around the perimeter once they’re laid – this is known as haunching. For curved areas of paving, aluminium or plastic edging products are also options.
Base material: Pavers are laid into a bed of sand, about 25mm thick, but it’s essential the ground below the sand (the subsurface) is stable so the pavers don’t settle unevenly or shift over time. If your subsurface is heavy clay, you can get away with just compacting it before laying the sand. However, if the ground is soft or unstable, you’ll need to lay road base or crushed rock, about 75mm thick, then firmly compact and lay the sand on top.
Drainage: While paved areas may look flat, they usually feature a slight slope so rainwater can drain away quickly. When you’re preparing the ground, it’s important to create a fall in the subsurface of about 15-20mm per metre, away from any adjacent building.