Installation Instructions

Installation Instructions
3-1/3" Solid and InvisiVent
®
Soffit
These instructions describe and illustrate the steps
involved in installing CertainTeed siding and trim. Their
purpose is to provide detailed information and how-to
tips that will simplify the installation process. CertainTeed
shall not accept any liability or responsibility under its
written warranty for failure caused by application that
does not meet our minimum requirements for proper
installation. These requirements are outlined throughout
the CertainTeed Installation Guide (CTS205). Any
deviations from these requirements should be approved
in writing by CertainTeed Corporation.
Installation over open eaves
In most situations, 3-1/3" Solid and InvisiVent Soffit
should be installed like our standard soffit products.
However, when it is installed over open eaves, follow
these installation techniques.
Install receiving channels
There are two ways to install receiving channels for soffit.
The best approach is to select a method that works most
effectively with the construction techniques used to
create the eave. Examine the illustrations, and find the
one that most closely resembles the construction
methods on your particular project.
Use either 3/4" J-channel or 3/4" F-channel, or make
receiving channels using coil stock.
Install the receiving channels following the details shown
in the illustrations.
Nail the channels every 12" to 16", positioning the nail in
the center of the slot. Do not nail tightly.
NOTE: If you are concerned about excessive insect
infiltration with the InvisiVent Soffit, cover the
openings with corrosion-resistant mesh or other
screening before installing the soffit.
Install soffit
Nail the soffit every 16" or 24", depending upon local
building codes and stud spacing. 3-1/3" soffit will span
up to 24" without additional nailing strips.
Installation over existing soffit
When installing InvisiVent Ventilated Soffit over an
existing solid wood soffit, you must cut openings into
the existing soffit to provide adequate airflow through the
InvisiVent Soffit. The goal is to have at least 9 square
inches of net free air per lineal foot of soffit. Removing a
center portion of the existing soffit will provide the
desired airflow.
Using a saw, cut along the length of the existing soffit.
Leave 2" to 3" from both the wall and the fascia so that
you will have enough wood surface to securely fasten
the soffit.
Remove the center portion of the existing soffit.
Install the soffit as described above.
If you have any questions about installing this product,
please call us at 800-233-8990.
© CertainTeed Corporation 6/06
3-1/3" Solid and InvisiVent
®
Soffit Installation Instructions | 1 of 1
557.pdf
fascia cap or
coil stock
open
rafter
F-channel
soffit
add framing
J-channel
soffit