Instructions / Assembly
Figure 12: Install the shims in the correct locations and in the correct sequence.
  Stand on the inside of the door and center the door in the opening. 
  Shim tightly at the bottom corners of the door unit (Points A in 
  Figure 12).
This will keep the door centered and the frame tight against the sill. 
Shim the top of the door on the latch side (Point B in Figure 12). Install 
shims until there is a consistent 
1
⁄
8
” gap between the top of the door slab 
and the frame header.
Shim the hinge-side of the frame (Point C in Figure 12). This will hold 
the door tight in its position relative to the frame. The door should 
operate freely with nothing but shims holding it in place.
CAUTION: Do not open door panel greater than 30-degrees until 2 
1
⁄
2
” 
screws have been installed. (Points D, E, F & G in Figure 12).
From the outside and with the door closed, ensure that the frame 
is in a straight vertical plane (not twisted). To do this check that 
the weather-stripping on the latch side is evenly compressed 
along the entire height of the door slab without any pinching or 
gaps (see Figures 9 and 10).
Figure 13: Proper position of shims at the bottom of the door (Points A).
3
B
F
G
G
F
A
C
E
E
D
A
X
PLEASE NOTE: Failure to install this unit in accordance with
architect, design professional or product manufacturers instructions will 
have a direct effect on the units performance and/or long term wear. 
Installer shall be experienced in performing work required and shall be 
specialized in installation work similar to that required for this project. 
Warranty claims are subject to site inspections by a qualified
manufacturer’s representation to establish probable cause and proposed 
corrective action.
Critical Point: Although all steps are critical, this symbol
identifies procedures requiring extra attention.
Check Your Work: This symbol identifies when the work should 
be checked for correctness before continuing with installation.
Figure 1:  A clean, level, solid sub-floor area is essential to successful
installation.
Ensure that the following conditions are met:
Clean, clear work area
  •  The rough opening (RO) is ideally 1” wider and 1/2” taller
    than the outside frame dimensions of the door unit. Units
    intended for installation in high velocity windstorm markets
    require less clearance between unit and RO (1/4” sides & top).
  •  The RO is plumb, square and level 
  •  The old door frame has been completely removed in retro-fit
    installation
  •  The sub-floor area is clean, dry and level
  •  The existing sub-floor area is at least 6” deep for  4-9/16”
    frames and at least 8” deep for 6-9/16” frames.
  Because a solid, level sub-floor is absolutely essential for proper
  door unit installation, do not proceed with the installation until
  the sub-floor is both solid and level.
Figure 2: Caulk is applied in three parallel lines running the width of the sill.
Remove all packaging materials such as nails, staples and screws. 
Figure 6: Place the sill in the opening first and then tilt the door up into the 
opening.
Figures 7 and 8: The exterior trim (brickmould) rests up against exterior
sheathing or slides into the opening of exterior brick.
Stand on the outside of the doorway. With the exterior side of 
the door unit facing you, tilt the door unit toward you (Figure 6). The 
brickmould (not supplied with all units) should rest up against the
siding of the exterior wall (Figure 7) and should slide into the RO of a 
brick home (Figure 8).
If door unit is supplied without a clip or plug holding door 
aligned and closed, do not leave the door wide open during
installation. The weight of the door may cause it to fall and
cause injury.
 
Figure 16: Install the shims in the correct locations and in the correct sequence.
Stand on the inside of the door and center the door in the opening. 
Shim tightly at the bottom of the unit (Points A in Figure 16).
This will keep the door centered and the frame tight against the sill. 
Shim the top of the frame (at Points B in Figure 16). Install shims until 
there is a 
1
⁄
8
” gap between the top of the door slabs and the frame header. 
This will hold the door tight in its position relative to the frame. The 
door should operate freely with nothing but shims holding it in place.
CAUTION: Do not open door panel greater than 30-degrees until 2 
1
⁄
2
” 
screws have been installed. (Points C, D, E & F in Figure 16).
Door panels with glass inserts may sag toward the center. This is
normal. To correct sagging, align the flush bolts on the fixed door with 
clearance in the header and sill. Most units do not have pre-drilled holes 
in the header and sill. Holes 
must be drilled. Slide top 
flush bolt up against header 
and bottom bolt down 
against threshold to mark. 
Mark where bolts make 
contact with header and sill 
with pencil. Drill holes on 
marks to receive bolts (1
1
⁄
2
” 
deep minimum). Once holes 
are drilled, close panel and 
engage bolts making sure 
they extend far enough to 
secure unit.  If there is a 
gap between the 
For all door types, it is essential that the frame is in a straight 
vertical plane and is not twisted. Check alignment using this 
method: Stand on the outside of the door. Check that the
weatherstripping on the latch side is evenly compressed along
the entire height of the door slab without any pinching or gaps 
(Figures 9 and 10).
Figures 9 and 10: The weatherstripping on these doors is not evenly 
compressed.
Figure 11: Screws are installed 
through the jamb, shims and into the 
2x wood studs or bucking.
Instructions vary according to door type. Confirm which door type is 
being installed. some door styles not available in all markets.
For single door unit, use Step 5A. For double door unit, use Step 5B. 
For single door unit with one or two sidelites, use Step 5C.
After shimming, the door is fastened to the studs by installing screws 
through the jambs, shims and into the stud (Figure 11).
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Shim behind the latch-side jamb (Points F in Figure 12) approximately 
8” from the top and bottom of the frame. Install shims until there is 
an even 
1
⁄
8
” gap between the jamb and the edge of the door slab along 
the door. Shim behind the latch-side jamb (Points G in Figure 12) just 
above and below the dead bolt hole, maintaining the 
1
⁄
8
” gap (Figure 
14). Pull the weatherstripping away from the jamb (Points F on Figure 
12) and screw 2
1
⁄
2
” installation screws (by others) through the jamb and 
shims into the stud (Figure 15).
Figure 15: Install 
screws underneath the 
weatherstripping.
When the shims are
properly installed, the 
frame should not move or 
twist at all when the screws 
are tightened and
counter-sunk thereby
maintaining the 
1
⁄
8
” gap. 
If there is any movement, 
loosen the screws and shim 
tighter to maintain the 
1
⁄
8
” 
gap, then re-tighten the 
screws.
Figure 14: Shims are placed above and 
below the dead bolt hole (points G in
figure 12).
     Ensure that there is an even gap across the top of the door slab.
With the door closed and from the inside shim directly behind the 
vacant hinge screw hole in each hinge (Points D and E in Figure 12) 
until there is a consistent 
1
⁄
8
” gap between the hinge-side jamb and the 
door slab edge along the entire height of the door. Gap between the 
latch-side jamb and the door slab edge should be 
1
⁄
8
” at the top and
bottom of the door only. Drive one of the 2
1
⁄
2
” screws supplied through 
the vacant hole in each hinge, through the jamb, shims and into the
stud or rough buck (Figure 11).
Proceed to Step 6.
3
3
3
Some dwelling designs/conditions may require special installation steps, consult your
architect, design professional and/or product manufacturer for additional guidance.
Variations in threshold design may require that the caulk lines be
applied directly to the bottom of the door unit to ensure a
necessary weather-seal. Inspect the bottom of door unit to 
confirm it features a flat surface before caulking the sub-floor
area.
Apply three 1/4” lines of caulk along the length of the sub-floor, the first 
line starting approximately 1” from the inside edge. The lines should be 
about 1” apart.
Door units featuring multiple door panels or glass inserts are 
heavier and more difficult to handle - do not attempt to handle 
without assistance.
single door 
(X for operable panel or O for non-operable panel)
A:
single or double door with one sidelite
(OX or XO for unit featuring operable panel with non-operable panel)
Figure 5: Some door units may be supplied with a “clip” or “plug” holding the 
panel aligned and closed during the initial installation steps. Do not remove at 
this time. Some door units may be supplied with a double headed nail or screw 
holding panel closed - this needs to be removed at this time.
single with two sidelites 
(OXO for unit featuring operable panel with two non-operable panels)
C:
Figure 4: Some door units may be supplied with a wood or cardboard skid plate 
located along the bottom of the door. Needs to be removed.
double door
(XX for unit featuring two operable panels)
B:
DO NOT utilize the wall to square and level unit. Unit must be 
square and level to insure proper operation and performance.
Screws located in hinge or strike position shall be placed in the 
thin (rabbet) section of frame, other screws shall be placed in 
thick (stop) section of frame. Wide frames should be attached 
with a screw in both sections of the frame to minimize rotation.
When shims are properly installed, the frame should not move
or twist when the screws are tightened and counter-sunk, thus 
maintaining the 
1
⁄
8
” gap between the edge of door panel and 
frame. If there is any movement, loosen the screws and shim 
tighter to maintain the 
1
⁄
8
” gap, then retighten the screws.
B
E
F
E
A
D
C
A
B
F
XX
Figure 17: Correct sagging until the flush bolt 
slides freely into the pre-drilled hole (not typical 
of most units) in the head/threshold.
Figure 18:
 The gap between the door 
slabs and the head is not evenly aligned.
Figure 19: The gap between the door 
slabs and the head is evenly aligned.
 
Figures 21 and 22: The second set of supplied screws is installed in the vacant 
hinge holes or under the weatherstripping.
From the outside and with the door closed, ensure that the frame 
is in a straight vertical plane (not twisted). To do this, check that 
the weatherstripping on the latch side is evenly compressed along 
the entire height of the door slab, without any pinching or gaps 
(Figures 8 and 9).
For units with only one non-operable panel attached on the latch side 
of the door: The second set of supplied screws are installed through 
the thin (rabbet) section of the jamb using the vacant hinge screw holes 
(Figure 21). Typically long security screws are used to install the dead 
bolt strike plate (Step 6).
For units with only one non-operable panel attached on the hinge side 
of the door: The second set of supplied 2
1
⁄
2
” screws are installed through 
the thin (rabbet) section of the jamb under the weatherstripping through 
the shim and into the stud approximately 8” from the top and bottom of 
the jamb (Figure 22). Shim just above and below the dead bolt hole and 
drive the supplied 2
1
⁄
2
” installation screws through the dead bolt strike 
plate (Step 6).
When shims are properly installed, the frame should not move or 
twist at all when the screws are tightened and counter-sunk, thus 
maintaining the 
1
⁄
8
” gap. If there is any movement, loosen the screws 
and shim tighter to maintain the 
1
⁄
8
” gap, then re-tighten screws.
B
E
F
F
E
A
C
D
D
D
A
Once there is an even 
1
⁄
8
” gap across the top of the door slab and the 
weatherstripping is evenly compressed along the height of the door 
slab, proceed with the installation.
Shim at points D, E and F on the perimeter of the frame (Figure 20), 
until there is an even 
1
⁄
8
” gap on both sides of the operating door slab.
Drive the supplied 2
1
⁄
2
” installation screws, three on each exterior jamb of
a fixed panel, through the exterior (stop) section part of the jamb, through 
the shims and into the studs. Note: If the door is factory-finished use the
“Factory-Finished Door System” information for fastening through
exterior jambs.
For units with two non-operable panels: Typically long security screws 
are used to install the dead bolt strike plate (Step 6).
Proceed to Step 6.
Factory-Finished Door System
Because the inside of the jamb is not accessible, a 
3
⁄
8
” hole must be drilled through 
the factory-finished exterior jamb, 
1
⁄
4
” deep at all points where the door system is 
shimmed (three on each exterior side of a non-operable panel, Figure 23). Drive 
the supplied 2
1
⁄
2
” installation screws, through the drilled hole in the exterior thick 
(stop) section of the jamb, through the shims and into the studs (Figure 24). Use 
the supplied caps to cover the holes in the exterior jamb (Figure 25).
Figures 24 and 25: Drill holes through the exterior jamb 
on factory-finished doors to install screws and plugs.
Figure 23: Pre-finished 
systems must have 
holes drilled before 
screws are installed.
3
3
XO
Remove this por-
tion of plug prior 
to installing.
Note: Units 
intended for 
installation in 
high veloc-
ity windstorm 
regions may 
require additional 
points of
attachment. See 
local retailer for
installation sheet 
supplement.
Note: Units 
intended for 
installation in 
high veloc-
ity windstorm 
regions may 
require
additional points 
of attachment. 
See local retailer 
for installation 
sheet supplement.
Note: Units 
intended for 
installation in 
high veloc-
ity windstorm 
regions may 
require
additional points 
of attachment. 
See local retailer 
for installation 
sheet supplement.
threshold and weatherstrip block around the foot bolt, the hole is not 
deep enough (the weatherstrip block must touch the threshold to
properly seal the unit). Shim tightly behind the vacant hinge screw hole 
in the bottom hinge (Point C in Figure 16) until the lower flush bolt 
slides freely into the clearance hole in the sill. Secure the door by
driving a 2
1
⁄
2
” installation screw supplied, through the hinge and jamb 
and into the stud. If the flush bolt does not slide freely, loosen the 
screw, shim more tightly and then tighten the screw.
Shim behind the vacant hinge screw hole in the top hinge (Point D 
in Figure 16) to align the top flush bolt with the clearance hole in the 
header (Figure 17). Secure with the 2
1
⁄
2
” installation screw supplied, 
through the hinge jamb and into the stud.
From the outside and with the door closed, ensure that the frame 
is in a straight vertical plane (not twisted). To do this check that 
the weatherstripping on the astragal side is evenly compressed 
along the entire height of the door slab without any pinching or 
gaps (see Figures 8 and 9).
Standing on the inside, shim behind each of the vacant hinge screw 
holes in both the top and bottom hinge on the operating door (Points E 
in Figure 16) until there is a consistent 
1
⁄
8
” gap along the entire height of 
the door between the operating door and the passive door. There should 
also be a  
1
⁄
8
” gap between the top of each door slab and the header.
When shims are properly installed, the frame should not move or twist 
when the screws are tightened and counter-sunk, this maintaining the 
1
⁄
8
” gap. If there is any movement, loosen the screws and shim tighter to 
maintain the 
1
⁄
8
” gap, then retighten the screws.
Install two 2
1
⁄
2
” screws along the head jamb of double door systems for 
additional reinforcement. Screws should be installed above center of 
each panel. (Figures 17 and 18).
Using the supplied 2
1
⁄
2
” installation screws, drive a screw through the 
vacant holes in both the top and bottom hinge on the operating door 
(Points E in Figure 16), through the jambs and into the stud.
Shim behind the vacant hinge screw holes in each of the center hinges (Points
F in Figure 16) and secure using the supplied 2
1
⁄
2
” installation screws.
Proceed to Step 6.
3
Figure 20: Install shims in the correct location and in the correct sequence.
Stand on the inside of the door and center the door in the
opening. Shim tightly at the bottom corners of the door unit 
(Points A in Figure 20).
This will keep the door centered and the frame tight against the sill. 
Shim the top of the frame, behind the latch-side jamb (Point B in 
Figure 20). Install shims until there is a consistent 
1
⁄
8
” gap between the 
top of the operating door slab and the frame header.
Shim at the top of the frame, behind the hinge-side jamb (Point C in
Figure 20) to hold the door tight in its position relative to the frame. The 
door should operate freely with nothing but the shims holding it in place.
CAUTION: Do not open door panel greater than 30-degrees until 2 
1
⁄
2
” 
screws have been installed. (Points B, C, D, E & F in Figure 20).
www.masonite.com
Figure 3: Some door units will be supplied with plastic covers over the bottoms 
of the jambs. These must be removed before installation.


