To set the next course of block apply a one inch thick mortar bed along top of the first course.
Building a block wall fence.
Step 12 using a mason s line as a guide for the remaining block continue building the wall until it is complete.
Concrete blocks are concrete masonry units or cmus but we often refer to them as concrete blocks or cinder blocks learn more about concrete masonry units a wall typically requires 1 1 8 blocks per square foot.
Although building a wall is a challenging project it s.
Foundation all concrete block walls must rest on a sturdy foundation of poured concrete.
If you re building a long wall local building codes may require you to strengthen it by constructing core filled pilasters at intervals along its length.
Step 11 at the end of the wall set an 8x8x8 half block into the mortar bed with the smooth side facing out.
The pilasters are made by interrupting the course of the wall with two perpendicular blocks set side by side alternating with a full block every other course.
The depth and size of the foundation will vary depending on the size of the concrete block wall and the weight it must support but a typical freestanding wall requires a foundation that is about twice as wide as the wall itself and which extends about 1 foot down below the frost line.
While some capstones can cost as little as 95 cents apiece the average cost of a cinder block is 1 to 3 each the total cost of building a cinder block wall ranges between 9 and 12 per square foot with labor so an 8 x 15 foot wall would cost between 1 080 and 1 440.
Cinder blocks don t vary much in cost regardless of the type.
Finding how many concrete blocks you need for your project can seem like a confusing and challenging task but it can be simplified using the calculator above.
Learn how to build a low wall from concrete breezeblocks.
Whether you re building a retaining wall or just need some extra privacy a cinder block wall is an affordable way to get the job done.
Remember to check out the full diy construction video on our website.