Cover the entire surface of the concrete block roof with a polyethylene sheeting and allow it to cure.
How to build a roof over concrete block.
Step 3 placing the steel joists.
In some regions concrete block is also a common building.
For example the florida based company hurricane proof systems offers a 7 inch 18 centimeter slab of concrete in three layers.
Exact specifications vary but most concrete roofs are several inches thick.
The pros cons of concrete block house construction.
The blocks come in several sizes but this guide will assume you are using a 16 3 4 inch wide concrete slab.
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.
To install such a roof a crew first builds a framework for the intended roof.
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.
Make sure that the anchor bolts are directly in the center of the cinder block core.
The steel joists will provide a strong foundation for the flat concrete roofing.