Instructions / Assembly

Applications
An ideal substrate for exterior
applications such as:
䡵 Tile applications
䡵 Stucco applications
䡵 Thin brick
䡵 Adhered stone
䡵 Countertops
䡵 Soffit panels
䡵 Sheathing panels
䡵 Decks
䡵 Outdoor kitchens/grills
Installation
General: All framing should
comply with local building code
requirements and be designed to
provide support with a maximum
allowable deflection of L/360
under all intended live (including
wind) and dead loads.
Note: Score and cut PermaBase on
the side of panel marked “Cut this
side.” Install tile and tile setting
materials in accordance with current
ANSI specifications and Tile Council
of North America (TCNA) guidelines.
Control Joints: For exterior instal-
lations, allow a maximum of 16
lineal feet between control joints.
(For exterior tile applications, control
joints should be spaced a maximum
of every 12'.) A control joint must
be installed but not limited to the
following locations: where expansion
joints occur in the framing or building
(discontinue all cross furring members
located behind joint); when boards
abut dissimilar materials; where
framing material changes; at changes
of building shape or structural system;
at each story separation. Place
control joints at corners of window
and door openings, or follow specifi-
cations of architect. Control joint
cavity shall not be filled with coating
or other materials.
DECKS
Subfloor: Plywood should be
securely glued and fastened to
floor joists spaced a maximum of
16" o.c. Subfloor should be sloped
at a minimum pitch of 1/4" per
foot. The floor surface should be
true to plane within 1/8" in 10'.
Underlayment: Using a 1/4"
square-notched trowel, apply a
setting bed of latex-Portland cement
mortar to the subfloor. Immediately
laminate PermaBase to subfloor,
leaving a 1/8" space between
b
oards at all joints and corners.
Leave a 1/4" gap along walls.
Stagger all joints so they do not line
up with underlying substrate joints.
Fasten PermaBase every 8" o.c.
throughout board field and around
all edges while setting bed mortar is
still workable. Around the perimeter
of each board, locate fasteners 2"
from the corners and not less than
3/8" from the edges. Fill all joints
solid with bonding material. On
non-tapered joints such as butt ends,
apply a 6" wide, 1/16" thick coat
over the entire joint. For all joints,
immediately embed alkali resistant
fiberglass mesh tape fully into
applied bonding material; ensure
that tape is centered over joint. Apply
bonding material over fasteners to
fully conceal. Remove all excess
bonding material and allow to cure.
Waterproof Membrane: Trowel
apply waterproof membrane to the
entire surface of the PermaBase,
following membrane manufacturer’s
installation instructions in detail.
WALLS & CEILINGS
Wall Framing: Studs should be
spaced a maximum of 16" o.c.
Edges/ends of PermaBase parallel
to framing should be continuously
supported. Provide additional
blocking when necessary to permit
proper PermaBase attachment. Do
not install PermaBase directly over
protrusions from stud plane such as
heavy brackets or fastener heads.
Ceiling Framing: The deflection
of the complete ceiling assembly
due to dead load (including insula-
tion, PermaBase, bonding material
and facing material) should not
exceed L/360. The dead load
applied to the ceiling frame should
not exceed 10 psf. Ceiling joist or
furring channel should not exceed
16" o.c. (Edges of PermaBase
parallel to framing should be
continuously supported.) Provide
additional blocking when necessary
to permit proper PermaBase
attachment.
Exterior Applications
6
Weather Barrier: While
PermaBase is unaffected by
moisture, a water barrier must be
installed to protect the cavity. It
should be installed according to
the manufacturer’s specifications.
PermaBase Cement Board:
Apply PermaBase with ends and
edges closely butted but not forced
together. Stagger end joints in
successive courses. Drive fasteners
into field of cement board first,
working toward ends and edges.
Space fasteners maximum 8" o.c.
for walls, 6" o.c. for ceilings with
perimeter fasteners at least 3/8"
and less than 5/8" from ends
and edges.
Joint Reinforcement: Trowel
bonding material to completely fill
the tapered recessed board joints
and gaps between each panel. On
non-tapered joints apply a 6"
wide, approx. 1/16" thick coat of
bonding material over entire joint.
For all joints, immediately embed
4" alkali resistant fiberglass mesh
tape fully into applied bonding
material and allow to cure. Same
bonding material should be
applied to corners, control joints,
trims or other accessories. Feather
bonding material over fasteners to
fully conceal.