- Q.Should underlayment for
resilient tile be installed perpendicular to the
joists, like the subfloor, or parallel to the
Paul Fisette responds: I would install the
underlayment panels perpendicular to the joists,
the same direction as the subfloor. It is a good
idea to stagger the joints — both the end
and edge joints — by at least 6 inches.
Most handbooks do not require that you "hit" the
underlying joists with the underlayment.
Personally, I prefer to have the end-joint hit a
joist, so I would offset the ends of the panels by
APA—The Engineered Wood Association has
a good publication called The
Design/Construction Guide: Residential &
Commercial that has a lot of very good
information about many floor, wall, and roof
applications. The publication addresses recommended
installation details, including nail spacing, for
the installation of underlayment. To order the
guide, call APA at 253/565-6600.