Every block wall-regardless of height or length-should be placed on a secure footing of poured concrete. A block barbecue grill or outdoor fireplace requires a large concrete pad as a footing. The footing must extend down beyond the frost line to prevent heaving in the winter.
For a footing poured in an area where drainage is a problem, lay a drain line along the outer edge of the form. Allow for a drop of about 1" for each 20' of drain line. Backfill over the drain line with about 12" of crush
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