![]() Measurement may not be the same on both sides of the window.Īfter you have cut the panel with tin snips or a utility knife, you’re ready to install it under the window. Transfer the horizontal measurement to the panel that will be installed under the window. This will serve as a template for the horizontal cuts. Mark it ¼” (6.4mm) below the sill height. Lock a small piece of scrap siding into the lower panel next to the window. Add approximately ¼” (6.4mm) to both sides-these marks represent the vertical cuts. Hold the panel under the window and mark the width of the window opening on the panel. To mark the vinyl panel to be cut, follow the steps below: Since vinyl siding can expand and contract depending on the outdoor temperature, fitting siding under windows requires careful measuring and planning. If a nail slot does not allow centering/securing into a nailable surface, use a nail hole slot punch to extend the slot and allow centering of the fastener.įor more information, refer to pages 15 and 16 of the Vinyl Siding Installation Manual.Space fasteners a maximum of 16″ (406.6mm) apart for the horizontal siding panels, every 12″ (305mm) for vertical siding panels, and every 8″ to 12″ (203mm to 305mm) for accessories unless otherwise specified by the manufacturer.Drive fasteners straight and level to prevent panel distortion and buckling.Place all other fasteners in the center of the slots.) (Start fastening vertical siding and corner posts in the top of the uppermost slots to hold them in position. Center the fasteners in the slots to allow for expansion and contraction.Start fastening in the center of the panel and work toward the ends.Do not drive the head of the fastener tightly against the siding nail hem instead leave a minimum of approximately 1/32″ (0.8mm) clearance (the thickness of a dime) between the fastener head and the vinyl siding to prevent panel buckling as temperatures change.Ensure panels are fully locked along the length of the bottom, but don’t force them up tight or stretch the panels upward before nailing.Make sure the fastener penetrates a minimum of 3/4″ (19mm) into a framing stud or furring.No matter what fastener you choose, follow the basic fastening steps listed below: 1″ (25.4mm) minimum in length and wide enough to allow free movement of the siding (approximately 1/32″ above and below the nailing hem).Not less than 16-gauge semi-flattened to an elliptical cross-section.Screws should be size #8, truss head or pan head, corrosion-resistant, self-tapping sheet metal screws.Can be used if the screws do not restrict the normal expansion and contraction movement of the panel on the wall.2 ½” (63.5mm) minimum for going through siding with backerboard. ![]()
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