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Old 01-11-2010, 07:44 AM   #16
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Glue coped inside corners of crown moulding?


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Thanks, Augie Dog. BTW, I used to live off Sonoma Highway a few miles beyond Santa Rosa. Beforemoving there, lived on Montgomery for a bit. I liked Santa Rosa.
Both are a couple minutes from my house. I'm near the foothills by Pacific Market. (Grace tract). Although my shop is in Cotati.

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Old 01-11-2010, 09:06 AM   #17
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Glue coped inside corners of crown moulding?


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if you are using the rail style of cutting you can also roll the piece on the saw rail as this will slightly change your cope, just need to remember which cut you are trying to shorten or lengthen. thats also why i use a gauge piece
tpolk: Not sure what that is, but if you mean in position against the fence but will experiment with that on some scrap.

Augie Dog: Pacific Market is either newer than when I was there or I just don't remember.

I have to decide if I want to refloat that high corner or just cheat the crown. I am leaning towards floating it, but have to take a closer look.

Last edited by Klawman; 01-11-2010 at 09:10 AM.
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Old 01-11-2010, 10:52 AM   #18
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Glue coped inside corners of crown moulding?


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tpolk: Not sure what that is, but if you mean in position against the fence but will experiment with that on some scrap.

Augie Dog: Pacific Market is either newer than when I was there or I just don't remember.

I have to decide if I want to refloat that high corner or just cheat the crown. I am leaning towards floating it, but have to take a closer look.
Behind the Flamingo Hotel
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Old 01-11-2010, 12:09 PM   #19
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Glue coped inside corners of crown moulding?


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Behind the Flamingo Hotel
I remember the Flamingo. Had some good times there. No idea what it is like, now. This was 25 years ago. I was a veteran's rep at Santa Rosa JC, where I went part time for a year
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Old 01-11-2010, 02:58 PM   #20
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Glue coped inside corners of crown moulding?


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The gap between the ceiling and the top of the joint formed by boards 4 and 1, pictured below, was caused by a bad mud job in that corner of the ceiling.
It's a good idea to take a scrap piece, cut to the ideal corner and see how the cope sets in the corner. Very rarely do they intersect perfectly. Take another scrap and make adjustments in the primary cut. When you're happy with the interface, cut the actual piece.
To make sure you're installing the crown flat against both the wall and ceiling, take a small piece and go around the entire room. Set it correctly and make a pencil mark, top and bottom. Do that 3-4 times per wall. When you're putting the large pieces in, you have a guide as to where it should sit.
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Old 01-11-2010, 04:48 PM   #21
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Glue coped inside corners of crown moulding?


Thanks Ron. I sort of did something like that. I made a gauge block the size of the drop down the wall and marked around the room. What I didn't do is run a line along the wall. Had I done so or merely been more observant, I would have seen that the ceiling was high in that one corner.

Anyway, I ripped those boards off the wall over the weekend. (Not exactly ripped. I can salvage most of the boards to do my daughter's room.) I am going to incorporate your idea of checking each corner with an ideal. That and practice with scrap on adusting cuts. Interestingly, each one of the 4 corners in this room or dead on 90 degrees. I had noticed some minor deviatioins at the wall's intersection with the ceiling, but for some reason never noticed how much that one corner was off.

I picked up the new boards this morning and already have them sanded and painted. Unfortunatley, there isn't much more I can do for the time being, as I understand they should become aclimatized to the house for a couple of days before cutting. (Not sure if this is necessary as I am in So Cal and they are Ultralight MDF.)

Now that I think of it. Of the first atttempt, one corner came out really well. I think I will chop the ends of the two boards that made up that corner and use it as an ideal exemplar for checking corners.

Again, thanks.
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Old 01-11-2010, 06:38 PM   #22
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Glue coped inside corners of crown moulding?


why is everyone against using glue?

anyway, like Ron said, practice pieces or a digital protractor like the one from Bosch. Makes it a little easier.
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Old 01-11-2010, 11:17 PM   #23
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Glue coped inside corners of crown moulding?


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why is everyone against using glue?

anyway, like Ron said, practice pieces or a digital protractor like the one from Bosch. Makes it a little easier.
How would a digital protractor be of any help? The problem was not with the corner formed by two walls. I measured each corner with a true angle tool to be 90 degrees. The problem was that the ceiling in a corner was higher than it was in any other place along any of the rooms 4 walls.

Last edited by Klawman; 01-12-2010 at 02:31 AM.
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Old 01-12-2010, 05:48 AM   #24
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Glue coped inside corners of crown moulding?


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How would a digital protractor be of any help? The problem was not with the corner formed by two walls. I measured each corner with a true angle tool to be 90 degrees. The problem was that the ceiling in a corner was higher than it was in any other place along any of the rooms 4 walls.
The digital protractor is good for the corners that are not 90 degrees. It's especially helpful with large crown that will be stained. No margin of error for very wide oak crown.
Of course the thing has to work properly, but that's another story.
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Old 01-14-2010, 07:52 PM   #25
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Glue coped inside corners of crown moulding?


Thanks all. I think I am starting to get it. Slow but getting faster and achieving better results. I began cutting the wood for the second attempt today, having pulled down the fist four boards. Here is a picture of the first corner completed. It is floating without a nail within 3 feet on either side. (This was one of the boogered up corners. The one good corner during attempt one is floating and matches up just as well to a temporary short board made from scrap. I painted the boards 2 days ago and hope to have very little touch up to do.
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Glue coped inside corners of crown moulding?-pict0069.jpg  

Last edited by Klawman; 01-14-2010 at 08:01 PM. Reason: replace out of focus pic
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Old 10-01-2013, 11:16 AM   #26
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Glue coped inside corners of crown moulding?


This is the kind of advice and suggestions I was looking for. I have an old brick 4-square, and I'm putting up crown molding. It wouldn't be too tricky, except there are not many places to nail...the interior of the outside walls has been insulated with 1 1/2" of foam, then 1/2" drywall. The ceilings upstairs are plaster/lath, and I added an inch of foam and 5/8th drywall.
On interior walls, I can hit studs...on exterior walls there are no studs or nailers, and on the ceiling the joists are over 2" away.
I think the job will be easier if I install a backer...maybe a 1" ripped narrow enough to fit into the corner and glued in place. Then, use glue on the crown, and use the 1" nailer to hold it in place till the glue sets.
The last time I did crown, good construction adhesives were not common. Tells ya about how long ago that was, eh?
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Old 10-01-2013, 01:32 PM   #27
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Glue coped inside corners of crown moulding?


I don't know what the weight of the crown will do to the drywall or if the paper will tend to shear from the drywall. Also, if the drywall is painted any adhesion is actually between the paint and the backer? Have you considered fixing the backer to the wall with long masonry bolts shot through the backer board, the drywall, the foam, and into the brick? Just an amateur's rambling thoughts.
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Old 10-01-2013, 04:43 PM   #28
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Glue coped inside corners of crown moulding?


Yeah...the crown is fingerjointed poplar, so it's fairly light. I think I should be able to glue and nail a backer strip, just cut small enough to fit completely behind the crown with some clearance between the two. I should be able to anchor that through the drywall, foam, plaster/lath and into a joist. Once that is set, I should be able to use it to always have a spot to nail. I'm not too concerned about it pulling off the paper, especially if I can tack it to keep the weight off until the glue sets, and if I glue it continuously at the top and bottom of the crown.

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