Craftsman CTS205 Triple 3-1/3 Solid, InvisiVent Perimeter Soffit, Install receiving channels

fascia cap or coil stock

open rafter

CertainTeed Vinyl Siding Installation Guide

Triple 3-1/3 Solid, InvisiVent

and Perimeter Soffit

Installation over open eaves

In most situations, T3-1/3 Solid, InvisiVent and Perimeter 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.

F-channel

soffit

add framing

soffit J-channel

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 InvisiVent or Perimeter Soffit, cover the opening 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. T3-1/3 soffit will span up to 24" without additional nailing strips.

Installation over existing soffit

When installing InvisiVent or Perimeter Soffit over an existing solid wood soffit, you must cut openings into the existing soffit to provide adequate airflow through the 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.

NOTE: Leaving solid areas of existing soffit intact reduces ventilation and must be considered when calculating total ventilation.

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