Step 3 placing the steel joists.
How to build a roof over concrete block.
Insert the 16 inch anchor bolts upright in the cement grout beginning at one corner and spacing the bolts four feet apart along the top of the wall leaving only two inches remaining above the grout and cinder block surface.
Cover the entire surface of the concrete block roof with a polyethylene sheeting and allow it to cure.
The pros cons of concrete block house construction.
Tip space the concrete blocks either 16 3 4 inches or 24 3 4 inches depending upon the size blocks you use.
To install such a roof a crew first builds a framework for the intended roof.
Building a concrete block shed.
Concrete block has been used as a building material for more than a century.
One of the most crucial step in building a flat concrete roof is to figure out the size of the concrete block you will need.
The steel joists will provide a strong foundation for the flat concrete roofing.
Exact specifications vary but most concrete roofs are several inches thick.
In some regions concrete block is also a common building.