Need help calculating crown molding angles and miter/bevel settings?
I was wondering if someone who had experience
with crown molding could give me some help.
I am in the process of adding 6 3/8 cove molding on the bottom floor of
our home. So far I have been cutting
90/270 inside/outside corners and since its paint grade using shims, etc. to
make my corners tight. I normally cut
crown on Kreg Jig which has worked great for me but this is my first time
cutting crown flat since this molding is too big to use a jig.
My question I have is on one particular
wall. Could someone please tell me if my
angles and figures are correct? From left to right it’s basically a 90/270 (angel finder actually read 48 degrees)
corner that turns at 22.5 degrees and again at 22.5 degrees to run straight
down the hallway. I used an online calculator
that does angles, http://www.sbebuilders.com/cgi-bin/geometry/crown_corner.cgi?Wall_Angle=112.5&Spring_Angle=45,
and got these figures:
Wall Horizontal Plane
Angle
Top of Form
Enter Wall Angle
Enter Crown Spring Angle
Bottom of Form
Wall Horizontal Plane Angle = 112.5 °
Crown Spring Angle = 45 °
Crown Laying Flat in Compound Miter Saw
Crown Miter Angle = 25.29 °
Crown Bevel Angle = 23.13 °
Crown On Edge in Compound Miter Saw
Crown Miter Angle = 25.29 °
Crown Bevel Angle = 23.13 °
Crown Upside Down and Backwards in Compound Miter Saw
Crown Miter Angle = 56.25 °
Could someone tell me if I am correct of correct me
if I’m not.
***For anyone wondering the wires at the ceiling are low voltage wires I ran along the ceiling because we have a slab. After two years I was tired of seeing my cable boxes on the floor and they are all being wired back to a central location where all of my AV equipment resides. Extra cables were ran for IR so that the TV's could be controled as well.***
Thanks,
Chris
Comments (6)
bobismyuncle
8 years agoxclusive
8 years agolast modified: 8 years agoRelated Discussions
Weedyacres- or anyone else just as handy- need crown molding help
Comments (7)When I was starting our DIY kitchen remodel, I decided to get a compound miter saw. After researching it I got a Hitachi 10" sliding compound miter saw. One thing I learned is that some people feel that for doing detailed work, a 10" is better than a 12", since the 12" blade can wobbly slightly. One thing that definitely makes CMS's more suited to the task is since they are more portable, you can set them up right near where the task is, rather walking down to the shop and back upstairs for each successive cut. Also I am prejudiced against radial arm saws since my high school shop teacher would frequently and loudly state: "Radial Arm Saws are only good for one thing: sawing off your own arm, that's why they call them radial arm saws."...See MoreMolding to mimic the look of crown
Comments (20)My house was built in 1891 and designed by a Boston architectural firm and was considered significant enough to be published in an architectural supplement to Scientific American the next year. It has picture rails close to the ceiling instead of crown molding in all of the bedrooms. The second owner didn't understand what they were and tried to caulk the joint in one room but the rest of them survived and I am the third owner. The living room has a picture rail down a foot from the ceiling with a large plaster cove above it. Other first floor rooms have large built-up crown moldings. Anything is better than nothing in a traditional house....See MoreNeed help cutting crown molding for diagonal corner cabinet
Comments (1)Hi, The best I can help you with is this table of angles; you will find the compound settings for 135* wall angle in this table. Since you have no way of tilting the saw the other way, you will have to make 1 cut (maybe two) upside-down; to do this right you will need to shim the molding flat on the saw table with small rips of scrap material, so the molding doesn't tip. Casey Here is a link that might be useful: compound angle table for crown...See MoreCrown moulding without coping?
Comments (5)A few days late to this thread, but since I just did one small room of CM, & am about to do a more complex room (w/ my brand new/used miter saw this time!) I thought I'd share the best info I found on mitering crown molding w/o coping. After watching his video & reading the site, I d'loaded this fellow's ebook ($20) & it was worth every penny to me. He made the upside down & backwards description a pleasant walk in the park, where for me the whole coping thing was like a trip to Mars. With foreign language guides. Maybe it's just me. But I have decent looking CM in the bath I did, just using my miter box, so I look forward to having perfect looking CM in my living room (w/ no square corners) now that I have the ability to cut my miters at 43, 44, 47, etc. with the miter saw :) Here is a link that might be useful: Cutting Crown Molding...See Moresloyder
8 years ago
PROSombreuil
8 years ago
PROJoseph Corlett, LLC
8 years ago
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