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Both lightweight and dense aggregate concrete blocks can be used below ground level. Standard size blocks may be used or alternatively, specifically dimensioned foundation blocks are available from some members.
Can you use concrete blocks as foundations?
Concrete blocks are ideal for flat or on-grade foundation support. They raise your structure off the ground and won't rot.
Can concrete blocks be used for footings?
Ensure a solid footing. Footings should be a minimum of twice the width of the concrete block (i.e., a typical 8x8x16 block would require a 16-inch wide footing) and extend below the frost line. NOTE: it is important to check local building codes for construction requirements in your area.
Can you use concrete blocks below DPC?
Use of blocks below ground should be carried out in accordance with the recommendations contained in BS 5628 – Part 3. Our range of concrete blocks are resilient and durable products most of which are perfectly suitable for use below damp proof course (DPC) and as foundation wall blocks.
Are concrete blocks waterproof?
How To Waterproof Your Concrete Blocks. Concrete blocks and cinder blocks are much more permeable to water and water vapor in comparison to poured concrete. According to ASHRAE Handbook, the permeability of concrete (1:2:4 mix) is 3.2 perms per inch of thickness.
Which is better concrete block or poured foundation?
Poured concrete wall foundations are arguably stronger than cinder blocks. Poured walls have a better lateral strength, which means they are able to resist more pressure from the water and the soil from the outside. A poured wall doesn't have joints like a block wall so it is easier to waterproof.
How long does a concrete block foundation last?
Poured concrete block bases and slab foundations will last for a lifetime, 80 to 100 years or more, given they have been constructed with precision. The termite proofing of the base, 12 years, provided the chemical barriers remain intact. Properly installed waterproofing with bituminous coating should last 10 years.
Which is cheaper poured or block foundation?
Is a poured concrete foundation cheaper than a block wall foundation? Usually, the cost of construction varies from place to place. But as a matter of fact, poured walls cost about 20% less than the block foundation walls.
What is the difference between a cinder block and concrete block?
Cinder blocks are lighter than concrete blocks. A concrete block contains stone or sand which makes it heavier. Cinder blocks don't have any tensile strength to withstand pressure. Concrete block is a hard, durable substance.
Do concrete blocks deteriorate?
Any coating on the inside of a concrete block wall will prevent the normal migration of moisture. The trapped moisture freezes inside the wall, causing mortar deterioration and spalling of the concrete blocks.
