How To Form A Concrete Roof On A Cellar

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.

How to form a concrete roof on a cellar.

Now for the fun part pouring a concrete roof. Then pour in the concrete and tie it into the wall blocks and that notched out area. Then a concrete mixture is poured spread through the framework and reinforced with steel bars which serve as a kind of skeleton for the cured concrete. Now for the fun part pouring a concrete roof.

Make this root cellar by burying a new concrete septic tank into a hillside. Then build a form using 2 by 4 s and 3 4 plywood spaced about every 12 inches on center. The steel joists will provide a strong foundation for the flat concrete roofing. Then put temporary 2 by 4 posts right about the center of the span of each of the rafter 2 by 4 s.

Illustration by len churchill keep your root cellar dry with roofing membrane on top and a perforated drain pipe to. So i created a plywood from with an arched top. The roof should require about 5 000 pounds of cement for an 8 x 8 cellar. Building a concrete ceiling will increase the phonic insulation and durability of your house.

The arch would also create a stronger roof. About 320 went into this 8 x 8 foot cellar. Then tie those into the rebar coming out of the wall blocks. This will cement the rebar into place.

The completed root cellar took approximately 21 cubic yards of concrete and two months to complete. Step 3 placing the steel joists. It also created a very strong form. A simple flat slab wouldn t do for you want condensation to run off to the sides.

The arch would also create a stronger roof. The blocks come in several sizes but this guide will assume you are using a 16 3 4 inch wide concrete slab. Pour the remaining cement all across the roof until you can no longer see any of the rebars. So i created a plywood from with an arched top.

Pour a concrete footer for the walls. But these advantages come together with a few drawbacks such as the higher cost of the project or the fact that pouring a concrete ceiling may take up to several months until you can actually build the walls and the roof. To give your roof extra strength frame the roof with cement blocks bend the ends of the rebar into them and pour cement into the openings. I had to pay an extra pumping fee for the narrow walls because the barrel rig had to use a pump hose but for the floor and roof they used a chute.