Installation Guide

ManualsBrandsMasonite ManualsDoor Casing Kits36-in x 80-ft Pine Exterior Door Jamb Extender Kit

JAMB

EXTENDER KIT

This kit is designed to work with Masonite 3-0 x 6-8

(36" x 80") and smaller inswing and out swing door

systems. The Kit will extend the frame and sill from

a 4-9/16" wall condition to 6-9/16".

IMPORTANT: The Extender kit must be installed

prior to installing the door system in the opening.

Completely read these instructions before installing

the Jamb Extender Kit. Some door units are heavy

and require a 2 person lift. Always work safely with

tools and wear proper personal protection equipment.

TOOLS REQUIRED:

u Claw hammer

u Tape measure

u Pliers

u 10D ﬁnishing nails

u Wood saw and hack saw (suitable for cutting

aluminum if installing kit on a door smaller than 36”)

u Premium paintable exterior grade caulk

u Pencil

u Square

u Screw driver (cordless drill)

KIT INCLUDES:

u Left jamb Extender

u Right Jamb Extender

u Head Jamb Extender

u Aluminum Threshold Extender

u #8 x 1-5/8" wood screws

STEP 6 – REATTACHING BRICKMOLD

(IF NEEDED)

With the extender kit properly installed, the

brickmold can be attached prior to installing the

door unit in the opening or attached after the

unit is installed.

Aligned all three pieces of brickmold to ensure

proper ﬁt of the miter corners. When properly

positioned (1/2" reveal from inside edge of

frame) secure the brickmold to the extended

jamb using seven 10d ﬁnishing nails evenly

spaced per side and four across the top piece

of brickmold. If Brickmold is being attached

prior to installing the unit the miters can be

cross nailed as shown in Figure F.

FIGURE F

STEP 7 – FILL AND CAULK

Fill any original nail holes on the brickmold with

exterior grade wood putty or paintable caulk.

Caulk seams between extender pieces, at the

sill, and Brickmold to frame.

Be sure to follow the installations Instructions

provided with your door system to ensure a

trouble free installation

1/2"

HMD-18106

6497234

WARNING: This product can expose you to chemicals including

wood dust, which is known to the State of California to cause

cancer. For more information go to www.P65Warnings.ca.gov.

Summary of content (2 pages)

PAGE 1
STEP 6 – REATTACHING BRICKMOLD (IF NEEDED) STEP 7 – FILL AND CAULK With the extender kit properly installed, the Fill any original nail holes on the brickmold with brickmold can be attached prior to installing the exterior grade wood putty or paintable caulk. door unit in the opening or attached after the Caulk seams between extender pieces, at the unit is installed. sill, and Brickmold to frame.
PAGE 2
STEP 1 – POSITIONING DOOR UNIT ON WORK SURFACE & REMOVING BRICKMOLD (IF NEEDED) Lay the door system flat with the side to be extended up on a padded sawhorses or other protective surface to avoid scratching the door. For Inswing units that have brickmold attached carefully remove the brickmold by tapping on the back side of the brickmold with a hammer. Begin at the bottom of the unit and work your way around the frame.