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CertainTeed Vinyl Siding Installation Guide
54
Corner Blocks
Corner block
Install 1/2" J-channel as a starter. Measure and cut the side
lineals to the exact size of the window or door opening.
Cut the top and bottom lineals 1/4" longer than the window.
Using vinyl snips, make two 1" long cuts in the pocket areas on
both sides of each lineal. These cuts allow the lineals to connect
with the corner block and help provide proper drainage.
NOTE: It may be helpful to hold off securing the lineals until
the corner block is in place.
Position the corner block by inserting the top lineal into the corner
block’s receiving area—making sure the lineal’s pocket is inside
that of the corner block.
Position the vertical (side) lineal into the corner block by inserting
the pocket of the corner cover into the pocket of the lineal.
This will ensure proper drainage.
Corner block with rosette
Locate the small dimple on the back side of the block’s face or
measure 2-5/16" as shown and mark.
Drill or punch a 3/32" to 1/8" diameter hole through the face of
the block—the hole must not be larger than 1/8".
NOTE: Check the back side of the block for this location—
marked by “+”.
Apply the rosette clip from the backside. If desired, a small amount
of caulk can be applied over the hole prior to applying the rosette.
1/8" per side
make 1" cuts
2-5/16"
2-5/16"
rosette
center
(back
side)
rosette clip