18
General
Product
Information
Working
Safely
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
Install per appliance
manufacturer’s
recommendations
Do not
caulk
1/4” gap
HardiePlank
®
Lap Siding
Sheathing
Starter
Strip
Z Flashing
HardieWrap
™
Weather
Resistive
Barrier
Do not
caulk
1/4” gap
HardiePlank
®
Lap Siding
Sheathing
Starter
Strip
Z Flashing
HardieWrap
™
Weather
HardiePlank
®
Lap Siding
Do not caulk
1/4” gap
Sheathing
Starter
Strip
Z Flashing
HardieWrap
™
Weather
Resistive
Barrier
LIGHTS AND ELECTRICAL OUTLETS
Lights and Electrical
boxes should have
the same flashing and
blocking as other large
penetrations such as
vents. Many lights
utilize square electrical
boxes. Blocking a
square object should
still incorporate the
best practices of an
angled weather cut.
General Installation Requirements (continued)
HOT AIR VENTS (Dryer, Stove, Furnace, Heater, Etc.)
For hot air vents including dryer vents, stove vents, and
furnace and heater exhaust, it is important to move the air
away from the building envelope. As the vent is installed, a
path for that moisture to leave the area should be identified.
Consider what is being vented and where it is going before
installing the vent. For instance, a dryer vent directly under
an eave is going to force hot, moist air to rise and collect at
the soffit. A good preventative measure for many vents is to
increase the distance they extend from the wall to help expel
moisture from the building.
For dryer vents, avoid placement too low to the ground where debris could easily impede air flow, trapping heat and
moisture. Some types of high efficiency furnaces can be vented out through the walls. In these cases, avoid locating
the vent too close to the roof or eaves where heat and moisture will be trapped.
Any vent piping is required to have blocking and flashing at the penetration. A block of HardieTrim
®
5/4, 4/4 boards
should be installed around the point of penetration. The blocking should extend 3-4 in. along the wall from the edge
of the vent. To install a block around an existing vent, it may be necessary to cut several blocks, with weather-cuts on
each piece. Flashing must be installed over the top of the trim block.
TIP: Consider location of the vent prior to installation and consider extending the vent further from the wall.
4.22
4.23
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