Full Product Manual

119
General
Product
Information
Tools for
Cutting and
Fastening
General
Installation
Requirements
General
Fastener
Requirements
Finishing and
Maintenance
HardieTrim®
Boards/Battens
HardieWrap®
Weather Barrier
HardieSoffit®
Panels
HardiePlank®
Lap Siding
HardieShingle®
Siding
HardiePanel®
Vertical Siding
ESR-1844 &
2290 Report
Appendix/
Glossary
Working
Safely
INSTALLING HARDIEPLANK
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LAP SIDING AROUND WINDOWS WITH AN INTEGRATED J-CHANNEL
When installing fiber cement around a window with a “J” channel there are a few
guidelines which should be followed to control water flow:
1. All windows must be installed per manufacturers installation instructions and must
incorporate all necessary flashings.
2. At the bottom sides of the window, a flashing must be installed that will redirect any
water that runs down the inside of the “J” channel out and away so that it does not run
down the wall assembly and behind the plank below the window.
a. This can be done by inserting a flashing that runs the entire length of the window
(option 1) or by cutting the weather resistive barrier towards the bottom of the
window and inserting a smaller flashing and taping with seam tape to reseal the
weather resistive barrier (option 2).
b. This flashing would then be lapped over the last plank at the bottom of the
window, similar to a joint flashing, to direct water down and out to the front of the
cladding.
3. A “z” flashing must be installed and integrated into the weather resistive barrier at
the top of the window. The “z” flashing will allow water to be drained away from the
window and wall, opposed to being captured in the “J” at the top of the window.
(Refer to James Hardie Installation Instructions for further “z” flashing details).
4. Seal all field cut non factory ends with an exterior grade paint, primer, or sealer.
a. Insert ends of plank into the “J” channel of the window.
b. Do not try to squeeze caulk into the “J” channel.
c. Plank integrated into “J” channel must be primed, painted or caulked.
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Typical “J” Channel Window
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Wrap
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Tape Hardie
Weather Resistive Barrier
Z Flashing (Refer to James Hardie
Installation Instructions)
Flashing
J Channel
of Window
Seal field cut ends
Do not caulk
A.20
JOINT FLASHING WITH HARDIEPLANK
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LAP SIDING
Wrap
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Tape Hardie
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Weather Resistive Barrier
Option 1
Option 2
Weather
Resistive
Barrier
One piece of
Flashing
Weather
Resistive Barrier
Seam
Tape
Pieces of
Flashing
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A.19
One or more of the following joint treatment options are required by code (as referenced 2009 IRC R703.10.2)
A. Joint Flashing (James Hardie recommended)
B. Caulking* (Caulking is not recommended for ColorPlus for aesthetic reasons as the Caulking and ColorPlus
will weather differently. For the same reason, do not caulk nail heads on ColorPlus products.}
C. “H” jointer cover Flashing behind butt joints provides an extra level of protection against the entry of water
at the joint.
James Hardie recommends 6-in. wide flashing that overlaps the course below by 1 in. Some local building codes
may require different size flashing. Joint-flashing material must be durable, waterproof materials that do not
react with cement products. Examples of suitable material include finished coil stock and code compliant water-
resistive barriers. Other products may also be suitable.