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Old 09-16-2008, 03:19 PM   #1
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Crown on ceiling not 90 degree to wall


I am crowning my den. Most is routine molding, but one vaulted section has walls that meet the ceiling at 45 deg instead of 90. As a result, the molding is not flush with the ceiling. How do I handle this?

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Old 09-16-2008, 03:47 PM   #2
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Crown on ceiling not 90 degree to wall


There's no way to install conventional crown on a vertical wall that is met by a sloped ceiling, and have it touch the wall and the ceiling while still meeting neatly at your coped/mitered joints at the wall.

If your crown has a 45* spring angle (some is 38*, some is 52* more or less), cut small 45 degree triangular wood blocks and fasten them to the framing of the wall. That way you have something to nail the crown to to, and the top of your crown will project out at the right angle. Place them every foot or so.

If you want, you can mill a piece of moulding to go from the top of the crown to the ceiling to fill the gap. But, the gap might be a cool place for a rope light.

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Old 09-16-2008, 06:28 PM   #3
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Crown on ceiling not 90 degree to wall


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Originally Posted by Monju123 View Post
I am crowning my den. Most is routine molding, but one vaulted section has walls that meet the ceiling at 45 deg instead of 90. As a result, the molding is not flush with the ceiling. How do I handle this?
I had a similar problem with a stair wall that was open to the living room.
In my case. I was able install crown molding, upside down, that met the room molding......
Of course, I had vertical surfaces to work with.
Maybe, this will give you some ideas!
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Old 09-16-2008, 08:20 PM   #4
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Crown on ceiling not 90 degree to wall


Here's a picture of what I was describing...
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Old 09-17-2008, 08:34 AM   #5
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Crown on ceiling not 90 degree to wall


Here's a link to check out (go about 3/4's down the page to see some pics/drawings.... http://www.woodweb.com/knowledge_bas...l_ceilngs.html

Another article by Gary Katz: http://www.garymkatz.com/TrimTechniq...ansitions.html

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Old 02-20-2013, 10:37 AM   #6
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Crown on ceiling not 90 degree to wall


I have a situation similar to monju123, we want to put up crown molding in a bedroom with a slanted ceiling, use the molding to hide the joint from wall to ceiling and put lighting behind the crown. I have run a level line with a laser level around the room, there is a difference of 1 5/8" in height, some places high, some low. To set the molding to the level line means the joint will show in some places and the crown will be too close to the ceiling in others. I have set another line around the room to best match the joint thereby somewhat evening out the space between the crown and ceiling. This is more a question of aesthetics. Is there another method? I have put crown in the rest of the house, so the installation is not the issue. Any help would be appreciated.

Last edited by JRVSR; 02-20-2013 at 10:48 AM.
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Old 02-22-2013, 04:54 AM   #7
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Crown on ceiling not 90 degree to wall


By slanted ceiling of u mean ceiling not level or cathedral ceiling
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Old 02-22-2013, 08:59 AM   #8
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Crown on ceiling not 90 degree to wall


Vaulted/cathedral.

Last edited by JRVSR; 02-22-2013 at 09:02 AM.
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Old 02-22-2013, 11:56 AM   #9
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Crown on ceiling not 90 degree to wall


How about a piece of 1 x on the wall with the top rip an angle the pitch of your ceiling cut to one constant size put on level line nail in there would be a void between 1 x and the corner Sheetrock in some points but will have same reveal behind crown moulding. U can even incorporate the 1x into your crown if u want with a bead under crown or just hide flat side of 1 x behind crown. Hope u can understand that
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Old 02-22-2013, 12:26 PM   #10
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Crown on ceiling not 90 degree to wall


I had thought of that, wasn't sure of the outcome. I am going to get a piece of wider crown to see if that will help. Thanks for the response.
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Old 02-22-2013, 03:06 PM   #11
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Crown on ceiling not 90 degree to wall


Wider crown would be tougher if the top is being left open for lighting
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Old 02-22-2013, 04:13 PM   #12
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Crown on ceiling not 90 degree to wall


I plan to use the laser level to give me a line to set blocks cut to match the spring angle, and then secure the crown to the blocking. I am hoping the wider crown will give me more room to hide the discrepancies in the wall/ceiling joint.
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Old 02-23-2013, 11:09 AM   #13
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Crown on ceiling not 90 degree to wall


as kaschmi mentioned, you can bring the crown out further from the wall with a 1x added behind the crown. on the wall let the 1x hang down a bit below the crown and you could run 3'4" cove under up tight to the 1x or even some type of quarter round and cut angled blocks to attach to the 1x for the crown to nail to later. this would give the necessary void behind crown to allow lighting to work. just have to work lighting out with the blocks...

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