User manual VINYL SIDING INSTITUTE VINYL SIDING

[. . . ] Vinyl Siding Installation Manual Updated December 2007 This manual is published by the Vinyl Siding Institute, Inc. VSI members are manufacturers of vinyl and polymeric siding and suppliers to the industry. The information provided in this publication is offered in good faith and believed to be reliable, but is made without warranty, express or implied, as to merchantability, fitness for a particular purpose, or any other matter. VSI does not endorse the proprietary products or processes of any manufacturer. [. . . ] Remove all protrusions such as gutters, downspouts, and light fixtures. Check all walls for evenness and install furring strips where necessary. When installing furring strips, please take appropriate measures to establish a smooth and continuous surface. 25). Replace rotten boards Nail loose boards Figure 24. Furring strips NOTE: In cases where the lower portion of a horizontal siding panel must be trimmed so that it may be installed over steps, porches, etc. , the panel should be built out ("furred") for proper angle and rigidity. Utility trim can be used to seal the cut edge of the panel and then secured to the wall. Figure 25. 17 INSTALLING ACCESSORIES Before the siding itself can be hung, a number of accessories must be installed first, including starter strips, corner posts, window flashing, trim, and J-channels over the roof lines. 10" 10" Outside and Inside Corner Posts A water-resistive material should be used to flash the inside and outside corners a minimum of 10" (254mm) on each side before installation of the corner posts (Fig. 26). Figure 26. 1/4" space at top of wall NOTE: Install vinyl soffit and fascia before installing outside and inside corner posts. Place the corner post in position, allowing a 1/4" (6. 4mm) gap between the top of the post and the eave or soffit. Position a nail at the top of the upper slot on both sides of the corner post, leaving a gap of approximately 1/32" (0. 8mm) between the nail heads and the corner posts. The balance of the nailing should be in the center of the slot, 8" to 12" (203mm to 305mm) apart, again leaving 1/32" (0. 8mm) between the nail head and the corner post. This allows for the expansion and contraction to occur at the bottom. The corner post should extend 3/4" (19mm) below the starter strip. Make sure the posts are plumb (i. e. , vertically straight) (Fig. If more than one length of corner post is required, overlap the upper piece over the lower piece by cutting away 1" (25. 4mm) of the nailing flange on the top piece. Overlap 3/4" (19mm), allowing 1/4" (6. 4mm) for expansion. This method will produce a visible joint between the two posts, but will allow water to flow over the joint, reducing the chance of water infiltration. 8"-12" Figure 27. 1/4" space at top of wall Figure 28. 18 Starter Strip In order for the siding to be installed properly in a level fashion, the starter strip at the bottom of the wall must be level. Determine the lowest point of the wall that will be sided; from that point, measure up 1/4" (6. 4mm) less than the width of the starter strip and partially drive a nail at one corner. Attach a chalkline; go to the next corner and pull the line taut. Make sure the line is level by using a line level or a 4' (1. 2m) level. Snap the chalkline and repeat the procedure around the entire house. Optional method to determining the position of the starter strip in new construction and some residing applications: Measure down from the soffit at one corner of the house to the top of the foundation and subtract 1/4" (6. 4mm) less than the width of the starter strip. Make a mark on the wall and record the measurement. Transfer the measurement to the other corner of the wall. Snap a chalk line in between the corners at the marks. [. . . ] Nail every 8" to 12" (203mm to 305mm), positioning nails in the centers of slots. When cutting the last panel of the first course, be sure to allow room for expansion. For areas where more than one panel length is needed, use a double channel lineal or back-toback J-channel. If it is necessary to cut the nailing hem off the final panel, use a snap lock punch to create tabs every 6" (152mm) along the cut edge. [. . . ]