Installation Guide
INSTALLATION INSTRUCTIONS
for Interior Door Slabs (JII110)
3
INSTALL SLAB - CONTINUED
3
2. If necessary to t 
the existing jamb, 
a maximum of 1/4" 
can be trimmed 
from each side of 
hollow or solid 
core molded and 
ush doors only. 
Trimming any 
other type is not 
recommend. For the 
best appearance, 
trim an equal 
amount from 
opposite sides. To 
minimize chipping, 
stick masking tape 
along the cut line 
to each face of the 
slab. Make the cuts 
with a ne toothed 
circular saw (height) 
and wood plane 
(width). Trimming 
beveled edges may 
require re-beveling.
3. The latch stile may 
have a pre-cut 2˚ or 
3˚ bevel. This bevel 
maintains a 1/8" 
clearance between 
the jamb and latch 
edge and improve 
the t when the 
slab is closed. If 
the latch stile is 
not beveled, and a 
bevel is preferred, 
use a wood plane 
or ne-toothed 
saw to cut a bevel 
so that the slab 
face that rests 
against the stop 
becomes slightly 
narrower than the 
oppositeface.
TEST SLAB FIT IN JAMBS
Before installing any 
hardware, t the 
slab in the frame 
and verify it will t 
properly. Looking at 
the hinge side of the 
slab when it is closed, 
there should be 1/16" 
gap between the 
slab and hinge jamb 
and1/8" between the 
slab and the head and 
strike jamb.
Bottom 
rail
Stile
1/4"
1/4"
1/4"
Top rail
Trim-able 
portion
Trim-able 
portion
Slab
Bevel
Stop
1/16"
1/8"
1/8"
INSTALL HINGES
1. Three hinges are recommended for slabs up to 84" in height and four 
hinges for slabs over 84".
2. If re-using existing 
jambs, verify the 
existing hinge 
locations are plumb, 
or all in a straight line 
vertically. Position 
the new hinges in 
the existing locations 
and modify the 
mortises as necessary. 
Match the slab to 
the jambs using the 
followinginstructions.
3. If installing new 
jambs, measure down 
from the underside of 
the top of the jamb 
7" to position the 
top of the top hinge. 
Measure up from the 
bottom of the slab 10" 
to position the bottom 
of the bottom hinge. 
Place the middle hinge 
halfway in between.
4. When marking the 
slab for hinges, make 
sure the measurement 
from the top of the 
slab to the top of 
the hinge route is 
1/8"smaller than the distance from the head jamb to the top of the 
top hinge. This will allow 1/8" gap between the slab and head jamb.
5. When marking the 
slab, the distance from 
the inside face to the 
back of the hinge 
route should be 1/16" 
less than the depth 
of the hinge route on 
thejamb.
6. Using a template, 
mark the jambs and 
slab where the hinges 
will be mounted. 
Using a chisel or 
router, notch the 
jamb and slab for the 
outline of the hinge 
leaves and no deeper 
than the thickness of the leaves.
7. Using the hinge as a template, mark screw hole locations and drill 
pilot holes for all screws. If possible, it may be easier to remove the 
hinge pin to separate the hinge leaves. Use a hammer and a punch to 
drive the pin from the open end. Install the hinge leaves separately 
on the jambs and slab (we recommend using a hand screwdriver 
when installing screws into the slab to prevent stripping). Then, hang 
the slab in the frame by aligning the hinge leaves and re-install the 
hinge pins.
6 7/8"
7"
Plumb 
line
3/16"
1/4"
Slab
Hinge 
jamb
Stop




