Installation Guide

C
ompound Position Miters
Use this technique for cutting Crown moulding. This is the
m
ost complicated of all the mitering cuts. Note: When cut-
ting Crown Mouldings in the compound position, remember
“upside down & backwards”. This term is used because the
“TOP” of the trim that is posi-
t
ioned against the ceiling after
installation rests on the saw table
during the mitering process, and
the “BACK” of the trim that is
placed against the wall, after
installation, is set against the fence
d
uring the cutting procedure.
Compound Inside Corner Miters
A Left Hand inside corner miter is
i
llustrated in this photo.
Step 1 - Place the top of the pro-
file against the saw table and the
back of the profile against the
f
ence in a left hand compound
position. Then adjust the table
angle gage “clock wise” to 45° or
calculated angle, and cut.
Step 2 - Place the top of the profile against the saw table
and the back of the profile against the fence in a right
hand compound position. Then move the table angle
gage the opposite calculated angle, and cut.
Compound Outside Corner Miters
A Left Hand outside corner miter
is shown in this photo.
Step 1 - The trim should lie on the
saw table in a left hand com-
pound position. The saw is to be
adjusted “counter clock wise” to
the calculated angle before cutting.
Step 2 – Put the mating piece of
trim on the saw in the right hand
compound position. Then move
the table angle gage to the oppo-
site calculated angle, and cut. The
miter joint is ready to be put
together.
Splice Miters
This technique is used to join mouldings together in a linear run
or when a wall is longer than the trim you are installing. Most
splice cuts are made in the vertical
position. In the photo below, of a
splice miter, note the only change
made in producing the joint is the
right hand & left hand positions.
The saw angle should remain at the
same 45° setting.
Return Miters
This technique is utilized when moulding ends with an
exposed, unfinished end that would require finishing “paint,
stain, etc.” This miter joint will create a finished edge.
Step 1 – To produce this miter, cut the trim as though you
were turning an outside corner (45° saw setting).
Step 2 – Rotate the saw to the opposite 45° and cut a short
piece to mate to the first cut. Glue miter joint together
before attaching trim to wall. See photo below.
C
oping Joints
Coping is simply transferring the
c
ontour “profile” of one piece of
trim to the end of another piece
o
f trim, then cutting the profile
line so that, when finished, the
second piece of trim will mate
with the first with a nice joint.
S
tep 1 – Cut the first piece of
trim to length and position it
on the wall. Use straight cuts,
no angles.
S
tep 2 – To create the profile
line, cut the second piece of
moulding at a 45° as though
you were cutting an
i
nside corner.
Step 3 – Following the profile
l
ine as a guide cut the trim
with a coping saw.
Step 4 – The moulding should
be ready for installation.
S
ee photos.
Gluing Miter Joints
We strongly recommend gluing all miter joints on PVC or
styrene mouldings using a quality instant glue and/or PVC
cement. It may seem unconventional, but the benefits out
weigh the inconvenience. When assembling splice and
return miters try gluing the mouldings together before
installation. This will allow you to fit the joints uninhibited,
and fasten the trim to the wall as one unit. Fitting these joint
on the wall can be difficult and possibly jeopardize the
integrity of the miter joint.
Fastening Moulding to the Wall
Polystyrene and PVC trim can be nailed with finishing nails
and/or glued. Our recommendations for the nails are pan-
eling, finishing, or pneumatic finish nails. For the glue we
recommend PL Glues/PC – 200, 300, 400/LIQUID NAILS
applied according to manufacturer’s directions. Glue alone
is not advised for crown mouldings.
Helpful Hints
• Chair Rails can be installed 32” to 36”
from the floor.
• Base, shoe, and quarter rounds should
be the last mouldings to be installed.
• Use any brand of spray furniture polish on saw blade
as a lubricant for easier cutting.
• Use Rosettes and Plinth blocks at the
corners of windows and doors to
eliminate the mitering process. (see fig 1)
• Royal Mouldings also has a line of
products to aid in crown moulding
installation called Perfect Corners that
eliminate the need for miters.
• After installation is complete, caulk
and/or putty all gaps and nail holes.
Maintenance and Repainting
To clean Clearwood
®
PS, gently wipe with a damp cloth. To
clean other finished mouldings, use a mild detergent soap.
To re-paint white finished mouldings, lightly scuff, sand with
220 grit sandpaper and apply latex or oil based paint as
directed by paint manufacturer.
QuickTime™ and a
de compressor
QuickTime™ and a
de compressor
800-368-3117 • www.royalmouldings.com
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How to Cut and Install Moulding
How to Cut and Install Moulding
01-AC-20-TS-0705