Concrete Reasons To Be Walled In Cement (cont)
By Dawson Mills
There are, says Pocock, about 25 different systems
using forms filled with concrete now on the market. He uses
Polysteel, the trade name for the forms he applies to his projects.
Polysteel, he continues, has about 75 percent of the market. It
and three others represent "the lion's share."
In addition to building with it, Pocock is also the
distributor for Polysteel for this area. He is supported in his
efforts to popularize the technology by the Hampton Roads Concrete
Advisory Council.
Any style home, single or multi-story, can be
constructed using the technology. The 2,850-square-foot Homearama
concrete house is a three-bedroom ranch. Architectural lines can
be curved or straight. Window and door openings, including those
for multi-car garage doors, are provided for in the placement of the
forms.
The concrete (Pocock uses a modified 3,500 psi mix)
is poured once, after all the forms are in place and braced.
"We generally pour on Friday," says Pocock,
"and start working on the house on Monday. You put a little
time into the pouring and it comes out fine."
Advantages include high structural strength resulting
from the use of steel-reinforced concrete, even though 25 percent less
concrete is used than with conventional methods. Proponents of
the process tout it as ideal for areas susceptible to hurricane force
winds and earthquakes.
"The wall itself," says Pocock, who earned
a degree in civil engineering from Old Dominion University in 1988,
"is one large beam."
Sound deadening properties are exceptional. A
concrete house has an STC (Sound Transmission Rating) of 48.
Virginia Beach, says Pocock, requires an STC rating of only 49 for
construction in the highest noise zone.
He tells of one concrete house he constructed in a
neighborhood bothered by jet noise from a nearby airfield. The
couple living in the home had to come out on their patio to find out
what their neighbors were complaining about. The sounds of the
aircraft weren't audible inside the house.
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