Installation Instructions

PREHUNG DOOR FRAME EXTENDER
Install the sill extender onto the threshold by inserting the radius
edge of the extender into the groove at the front (outside edge)
of the threshold
(
fig.4
).
Put the curved edge of the extender
Run a 1/8” bead of caulk ¼” in around the perimeter of the
frame (fig.6
)
and then apply the extension jamb sides onto the
frame. Note: the beaded side of the extender should be in contact
with the frame (fig.7
)
. The side extenders are pre-cut and dadoed
to match the existing frame
.
Line up the angled dadoes and fasten
into the curved edge of the sill and then pull down to snap the
extender into place
(
fig.5
). Note: The use of a rubber mallet
may be needed to help the extender snap into place.
at 12” intervals with 3 ½” (16D) galvanized casing nails.
Pre-drilling is recommended to avoid splitting
(
fig.8, 9 & 10
).
The head extender is pre-cut for a 36” door. If the door size is
less than 36”, cut to fit and then apply.
(
fig.11
).
3
)
Install Sill Extender
4
)
Install Frame Extender
g. 4
g. 6
g. 7
g. 5
g. 10
g. 9
g. 8
g. 11