Soffit Installation

Follow this five-step procedure:

1. Install receiving channels (soffit receiver or J-channel).
   • There are several ways to install receiving channels for soffit. You can use accessories such as J-channel or F-channel. The best approach is to select a method that works most effectively with the construction techniques used to create the eave.
   • Examine figures 64 through 67 and find one that most closely resembles the construction methods used on this particular project.
   • Install the receiving channels following the details shown in figures 64 through 67. Nail channels every 8” to 12” (203mm to 305mm), positioning the nail in the center of the slot. Do not nail tightly.
   NOTE: Nailing strips must be installed as shown in Fig. 67 if the eave span is greater than 16” (406mm), unless otherwise specified in the soffit manufacturer’s instructions. In areas with high wind restrictions, nailing should not exceed 12” (305mm) on center, unless otherwise specified by the manufacturer.
   • If no soffit receiver is available for a situation best suited for the product, the J-channel can be modified to create an F-receiver (Fig. 68).
   • Simply cut slots in the nail flange area where it would be nailed to the wall (Fig. 68). After cutting the nail flange, bend the flange back and nail it to the wall.
   • If the soffit will turn a corner, cut and install the channel so there is 1/4” (6.4mm) for expansion at each of the adjoining walls.

   Figure 64.

   Figure 65.

   Figure 66.

   Figure 67.

   Figure 68.

   NOTE: These illustrations are based on common installation practices used in most areas of North America. Local environmental conditions (particularly high wind zones) and building codes may call for different installation techniques. Always consult the manufacturer’s installation instructions and local building codes to determine the correct installation methods to use on any job.
2. Measure from the wall to the fascia board. Then subtract 1/2” (12.7mm) to allow for expansion. Mark and cut this dimension on a soffit panel.
3. In situations with two channels, (Fig. 67), flex the panel between the two channels installed. It is critical in this application that the installed nailing strips are wide enough (4” [102mm]) to allow a fastener to attach to the soffit. Make sure the panel is perpendicular to the wall when fastening.
   In situations where the soffit panel will be attached at the wood fascia board and then covered with an aluminum fascia cover (Fig. 66), each soffit panel should be fastened through the nail hem and either into the wood fascia or into a wood shim using nails, screws, or staples.
4. To turn a corner, measure from the channel at the wall corner to the channel at the corner of the fascia board (Fig. 70). Subtract 1/4” (6.4mm) for expansion. Cut and install soffit double channel lineal or back-to-back J-channel. If necessary, install nailing strips to provide backing for the lineal. Miter cut the corner soffit panels and install as described in Step 3.
NOTE: According to the 2012 and later International Residential Codes, “Soffit panels shall be individually fastened to a supporting component such as a nailing strip, fascia, or subfascia component or as specified by the manufacturer’s instructions.”
5. Once the soffit has been installed, apply the field or factory-formed covers.
   • The fascia covers can be installed into utility trim (either factory-formed or field-fabricated) (Fig. 69) or behind the existing drip edge. The fascia has to be fastened with aluminum or stainless steel painted trim nails into the bottom leg, no more than 24” (610mm) on center.
   • When overlapping aluminum/vinyl fascia covers, make sure to overlap 3/4” (19mm).
   • Drive these nails through the fascia and only into the “V” groove of the soffit.
   • You may also need to face-nail the fascia. Always pre-drill holes into fascia and do not nail tight.

   Figure 69.

   Figure 70.