What are the spans you can have? What are the slab thickness parameters?

Spans are dependent on roof pitch and profile, reinforcement spacing and diameter, and the thickness of the concrete slab. The more complex the roof in terms of hips and folds,  the greater the span.

 

Generally speaking, the slab thickness of an inclined roof on new construction is 4 to 5 inches. For intermediate floors or flat roofs the slab thickness range is from 6 to 8 inches. 

What are the extra loads exerted on the footing? What additional adjustments need to me made to a footing?

Most footings for wood roofs will work for a concrete roof. Generally, the WRCS roof loads are within the load capacities for most South Florida soils and footing designs.

The low values of reaction pressures within the soil guarantees full stability in the structure under service load (self-weight) and lateral loads (wind pressures).

What about uplift during a wind storm? What are the pressures?    

The WRCS roof is very resistant to uplift wind force. The dead weight alone of a standard  WRCS roof is more than the uplift force caused by a 250 mph wind.

 

The high wind pressure on a Category 5 hurricane will not have a significant effect on the WRCS concrete roof because it does not exceed the self weight of the system.

 

 

What about water leaks and filtration?

Since the WRCS roof consists of monolithic construction, there are no joints or connectors where filtration and leakage generally occur; the roof is poured as a single unit. Furthermore, a waterproofing membrane, cementitious based sealant, or a concrete additive can be incorporated into the roof system for total protection against any water infiltration. 

 

 

How is the system monolithic? How is the reinforcement tied into the wall?

The system is monolithic because the entire roof is poured as a single unit. Moreover, the roof slab is poured with the tie beams in the case of block wall, or last wall pour in the case of ICF wall construction . The wall reinforcement is tied onto a grid of rebar within the roof slab.

What about building code approval? What "R" values does the system have?  What about fire resistance?   

Many homes using the WRCS roof systems have been approved and built throughout Florida including  City of Miami, Coral Gables, Dade, North Miami, Florida Keys, Ft. Lauderdale, Hialeah, Jupiter, Orlando, and many more.

The WRCS roof system has insulation already incorporated in it. Therefore, the entire attic (if desired) is a cool environment. With varying insulating values available for the WRCS roof, the value  most basic system starts at R22.

Concrete is non-combustive so in the event of a fire the shell and structural integrity of the roof will remain intact.