Lowering your basement can be done by either underpinning or bench
footing. in order to reach maximum height allowed to lower your
basement it is determined by:
• At which
height the main drain enters home (in other words if you want to
dig lower than the main drain you will require a sewage ejector
which takes all water and sewage below main drain and ejects it
out.
• The Thickness of foundation wall and the measurement is
from finished grade to new finish inside floor slab.
Lowering your basement
will be done in the A,B,C method what this means is first we dig out all
the A's maximum 4 feet wide, we then form and pour concrete 25 mpa. After
that stage we will install 2” inches of dry pack grout. We then
go on to do B, and C in the same procedure. All stages are inspected by
city Inspectors. This is for the underpinning method.
Bench footing is done in the 1 to 1 ratio for every 1 foot down you must
go out 1 foot. We then go on to install 3” inches of 3/4 inch gravel
with weeping tile around perimeter of basement which is terminated to
sum pump pit. The pit has a pump which pumps out natural earth water out
to side or back of home. The next step is to pour 4” inches of concrete
for the slab.
Some people install or at the least rough in radiant heat plastic tubes
in order heat the floors, either at the present time or the future (this
is optional). Also you can install 1 inch of solid STYRAFOAM UNDER CONCRETE
before pouring for insulation purposes.
For beam replacement if
there are brick columns, we can remove them and replace them with steel
columns. We also can change the old beams with new metal I beams.