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CertainTeed Vinyl Siding Installation Guide
75
Transitioning from brick, stone, or stucco to vinyl siding
To transition from brick, stone, or stucco to vinyl siding:
• Caulk where the sheathing meets the brick, stone, or stucco.
Caulk the flashing, and make sure a drip cap is in place.
• Use J-channel or starter strip to receive the siding when
installing horizontal siding, If you use starter strip, leave 3/8"
clearance so that the siding can engage securely.
• When installing vertical siding, use J-channel to receive
the siding.
Installing remaining courses
To ensure best appearance, position the laps to avoid unsightly
joint patterns. The illustration at left shows a well-planned
staggering of panel joints. Follow these guidelines:
• Separate joints by at least two courses.
• Avoid joints above and below windows.
• Leave at least 3' separating joints on successive courses.
• Use short cutoff lengths for fitting at narrow openings
between windows.
• Follow the planned pattern when applying the next
courses of siding.
Fitting under windows
You’ll probably have to cut panels to fit under windows.
To make this task easier, plan panel positioning as shown at left
so a single panel extends beyond both sides of window opening.
Follow these steps to measure and cut panels:
Hold the panel in place and mark the width of the window opening.
Add 1/4"–3/8" to both ends to allow for expansion. The resulting
marks show the location of vertical cuts. Extend the marks onto
the panel using a square.
Create a template for the horizontal cut using a small piece of
scrap siding. Lock this piece into the lower panel and mark 1/4"
below the sill height. This provides clearance for undersill trim.
Repeat the procedure on the opposite side of the window. (You
can’t assume windows will be perfectly level.)
Transfer the marks from the template to the panel. Connect marks
using a straightedge.
Cut the panel, using tin snips to make vertical cuts and a utility
knife to make the horizontal cut.
starter strip
or J-channel
sheathing
1/4"
1/4"
flashing
mortar