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Thinking of Building a Deck?
Posted April 26th, 2010 under renovations and repairs.
Once you've decided on the shape, there are two types of foundation. Traditionally, concrete posts 6"–10" in diameter are sunk below the frost line (typically 4' below-ground).
However, a cheaper and easier way (though frowned on by professionals) uses slotted concrete blocks on the ground to hold beams, which then hold up the deck joists.
The blocks actually work fine with the right spacing, and are easy to use and adjust. However, the total deck height shouldn't exceed two feet or it may be unstable. The main disadvantage is heaving due to frost, which requires maintenance each spring and precludes you fastening the deck to your house wall.
Want to know more about deck construction? Just ask me, I'll be happy to help.