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To save having to lift a heavy panel into position every time you want to position a post, use a batten cut to match the width of a panel as a guide. Following your string line, dig a hole for each post, using a hired post-hole borer or a post spade. Ram broken-brick or stone hardcore into the base of each hole to support the ends of the posts. Use a spirit level to help set each post upright in its hole, supporting the post with wooden braces. Ram more hardcore around the post to half-fill the holes. When you have erected the post, fill the hole with concrete. You can make your own concrete using 1 part cement, mixed with 2.5 parts sand and 3.5 parts aggregate. An easier but more expensive is ready-mixed concrete to which you simply add water. One type of ready-mixed concrete, is poured dry into each hole around the post, and then the water is added. The advantage of dry-mix concrete is that it sets quickly - in 5 to 10 minutes - rather than the 24 hours or so recommended for conventional concrete. Half-fill each hole as you erect the post, and top up with dry-mix when the fence is finished. To shed rainwater, shape the top of the concrete fill to slope away from the post, using a small trowel. |
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