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6. Buying clay
If your soil isn't usable, look in the Yellow Pages or at www.yell.com and other directories for clay suppliers. If they don't supply puddle clay they'll probably know who does.
Clay doesn't cost much, but moving it around does. If you live in the right area, then the price of the clay plus transport could well be less than a butyl liner.
How much clay will you need?
The clay lining should be at least 15cm thick, preferably 25cm thick to reduce the risk of damage by accidental prodding, vandalism, plant roots and worms. An even thicker layer is necessary for large ponds and lakes - ask the clay supplier for advice.
Estimate the area to be lined in the same way that you would for a sheet liner. There are two ways of calculating this:
- If you have already dug the hole, drape a tape measure inside from edge to edge. Measure the length and width. Multiply together to obtain the area.
- If you haven't dug the hole, mark the outline and measure the length and width on the ground's surface. Add on twice the planned depth to each measurement. Multiply the result to obtain the area.
Ask the clay supplier for a quote for sufficient clay to cover this area to the required thickness.
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Comments
1 Eric Lougheed 30 May 2009 11.08.45
2 Val 01 Jun 2009 10.12.03
Thanks for your proof-reading! Quite right - and have amended the article for future readers.
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Calculation formula is WRONG!
One must add TWICE the depth to each linear dimension (the side goes down one side & then up on the other!)