Installation Manual - CertainTeed

CertainTeed WeatherBoards Fiber Cement Siding Installation Manual
Structural Rainscreens
(Steel Studs/Steel Furring Strips)
Rainscreen systems are designed to promote airflow and
moisture management behind exterior cladding products.
They must be designed by an architect, designer or
project engineer. Non-structural lathe/furring strips are
used as a spacer to establish the rainscreen and are not
intended to substitute as a framing member for direct
attachment of fiber cement siding.
Steel furring strips must be applied to steel framing
members. Spacing between lathe/furring strips must
not exceed 24".
When incorporating CertainTeed WeatherBoards Fiber
Cement siding into a rainscreen system, adhere to the
following recommendations:
XXThe rainscreen system must be designed to ensure
that all appropriate windload and anchoring
requirements are met.
XXUse 20 gauge (minimum) steel furring. Steel furring
strips must be applied to steel framing members in
such a manner that they provide equivalent loadbearing
capability.
XXAlign all steel furring strips at framing member locations;
lathe/furring strip horizontal spacing must not
exceed 24".
XXBase the selection of fasteners on the thickness of any
non-structural material(s) between the fiber cement
siding product and the framing member. Use standard
fiber cement siding fasteners to attach the cladding
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through the non-structural lathe/furring strips and
any other non-structural materials to the structure.
(Refer to the latest CertainTeed WeatherBoards Fiber
Cement siding ICC-ES Evaluation Report for fastener
recommendations and fastening requirements.)
XXThe combined thickness of non-structural materials
(e.g. insulated sheathing, non-structural lathe/furring
strips, etc) between steel furring and exterior cladding
may not exceed 1" in thickness. (Lathe/furring strip
thickness requirements may vary; check with your
local code official or governing body for the building
requirements in your area.)
XXAdhere to all flashing, cutting and sealing requirements
outlined in the most current version of this manual.
Non-structural Rainscreens
Rainscreen systems are designed to promote airflow and
moisture management behind exterior cladding products.
When incorporating CertainTeed WeatherBoards Fiber
Cement siding into a rainscreen system, adhere to the
following recommendations and install all products in
accordance with all national, state, and local building
codes. Be sure to check with your local code official or
governing body for the building requirements in your area.
To attach fiber cement siding over non-structural furring
strips such as wood lathe/furring, treated plywood, or
alternative furring strips such as Trimline Flow-Thru
Furring Strips:
XXAlign all lathe/furring strips vertically at framing member
locations. Horizontal spacing for lathe/furring strips
must not exceed 24". Failure to fasten the lathe/furring
strips and the siding at framing member locations may
cause the siding to crack and/or wave.
X
X Base fastener selection on the thickness of nonstructural
material(s) between the fiber cement siding
product and the framing member. Use standard
fiber cement siding fasteners to attach the cladding
through the non-structural lathe/furring strips and any
other non-structural materials to the structure, and
refer to the latest CertainTeed WeatherBoards Fiber
Cement siding ICC-ES Evaluation Report for fastener
recommendations and fastening requirements.