Adding a room to an
existing house built on a slab requires extra care to prevent
them from separating due to changes in temperature and humidity.
Like other concrete slabs, it begins with proper layout and soil
preparation.
Forms for
pouring the concrete are set and inspected to be sure the dimensions
are correct and each corner perfectly square. DIRTCO crews also
set the reinforcing steel in the proper location and depth for the
best result.
The actual
pouring of concrete is possibly the most critical time. There are
several issues that have to be addressed, such as calculating the
correct amount of concrete mix to order, the method of delivery
to the site and sufficient manpower to complete the work once it
begins. Pouring and finishing must be completed before the concrete
begins to harden.
The crew
fills the footers first, making sure no air pockets remain. Working
the concrete back and forth helps the material settle evenly and
eliminates the high and low spots. With the existing house abutting
the new concrete, DIRTCO technicians hand trowel the finish directly
adjacent to the structure.
