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Using Lineals as Gable Trim
You can give gable end trim a more dramatic appearance by
using 3-1/2" or 5" lineals instead of J-channel.
To install the lineals:
Make a pattern duplicating the gable slope. To create an angle
template, lock a piece of lineal into the previous course of
siding or other gable starter. Hold a second piece of lineal or
starter against the slope and transfer the angle with a pencil.
Transfer the angle of the template to the end of a length of
lineal. Cut away lineal face and nail flange.
Turn pattern over and transfer opposite angle to second lineal.
Trim nail flange and receiving channel from opposite lineal to
this line. Do not cut lineal face.
Insert the full-faced lineal into the mitered lineal. If the nail
flange or return lips butt and prevent a tight fit, trim off
additional material from the second lineal.
Installing trim at roof line
To prevent water infiltration along the intersection of roof and
wall, install flashing before installing J-channel. At points
where vinyl siding and accessories will meet at a roof line –
such as areas where a gable dormer or a second story side
wall intersect with the roof – it’s best to position the J-channel
so it’s 3/4" to 1" away from the roof line. Placing the J-channel
directly on the roof line would subject it to a build-up of heat,
which could result in excessive expansion.
NOTE: If you use more than one length of J-channel to
span a wall surface, be sure to overlap J-channels 3/4".
90°
starter strip
3/4" x 1"
90°
55
Wolverine Fit and Finish Installation Guide