This clip shows how i set out and lay a concrete block base for a wooden shed, summerhouse or playhouse. block base for a wooden shed/summerhouse/playhouse out and lay a concrete block. A concrete block shed should be built on a slab or footer foundation. foundations should be level, square and built to appropriate depths for the location's frost line. a good foundation will eliminate many of the problems associated with building a concrete block shed.. Picture 7 & 8: to make a better bond between the concrete and the block, wet the block. use a trowel to fill the hole and slots in the deck block with concrete. push the 4
