All wood fiber subfloor materials need to be installed with sufficient
room to expand and contract as the ambient temperature and humidity changes.
TrimJoist provides a wide surface so that framing tolerances may be eased
enough to eliminate this problem.
Problem: Poor application of underlayment.
Many contractors use a composite underlayment board in areas that
require carpeting. This underlayment is non-structural, but provides a
very smooth surface. More often than not, the underlayment is attached
only by nails. Over the course of time, these nails begin to rub against
the underlayment causing squeaks. We suggest that the underlayment be
attached with both screws and glue with the same care as
was taken with the subfloor.
Problem: Subfloor not adequately attached to joist system
Conventional 2x joists or narrow flange I-beam type wood products do
not provide sufficient surface for good nailing technique. The full 3-1/2"
wide TrimJoist nailing surface allows for sufficient nailing and optional
gluing of the subfloor.
Problem: Joist system not stiff enough
In addition to the stationary loads on a floor, each step a person takes
places a small impact load on the supporting joists. Over the course of
time, this seismic stress can cause the whole system to become "loose."
TrimJoist products are not only designed to withstand these impact loads
they also provide for a strong-back mechanism which can disperse
these loads more evenly through the floor system.
