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Do-it-yourself columnar foundation made of blocks for a boiler room. I decided to build a detached frame boiler room for a solid fuel boiler. Since the building itself will not be heavy, I decided to make a columnar foundation from 20x20x40 cm blocks and 40x40x6 cm paving slabs. The size of the building will be 5x2.5 m. How to make a columnar foundation? 1. You need to prepare the base. Remove the topsoil under the building site. 2. Fill the areas under the supports with sand or crushed stone. 3. Set the pillars according to the markings. I filled the voids in the cinder block with cement-sand mortar in a ratio of 1:5. I recommend watching: Do-it-yourself extension foundation - • Do-it-yourself extension foundation Insulation of the foundation (basement) with your own hands - • Insulation of the foundation (basement) with your own ... #AlexanderKvasha