Crown Molding Corner Gaps - How to Fix?

Discussion in 'General Home Improvement Discussion' started by biddlecom, May 23, 2017.

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  1. May 24, 2017 #21

    nealtw

    nealtw

    nealtw

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    The height of the crown doesn't change the angle.
    The angle of the back is what might change.
    THe easy way to find that angle is have a piece of 3" with the same back angle cut that standing up and then lay it down and set the saw to match that.
    Somewhere I have a book of angles that came with the radial arm saw.
    Finding something like 31.6 degrees never really helped.
     
  2. May 24, 2017 #22

    nealtw

    nealtw

    nealtw

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    Until you get into 8" crown.
     
  3. May 24, 2017 #23

    nealtw

    nealtw

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    cutting it backwards like that would be easy with the angle cut to fit the back sitting against the table. I may try that.
     
  4. May 24, 2017 #24

    nealtw

    nealtw

    nealtw

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    [ame]https://www.youtube.com/watch?v=JWm7MuHVebM[/ame]
     
  5. May 24, 2017 #25

    bud16415

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    Band saw with jig and fence. :p
     
  6. May 24, 2017 #26

    nealtw

    nealtw

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    The fasted guy I ever saw do a huge crown had a flat jig and he used a skill saw.:trophy:
     
  7. May 24, 2017 #27

    bud16415

    bud16415

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    That foam stuff you could use a bread knife. My dad had a huge miter box that guided the saw. I wish I had that setup. I have coped with a saber saw before.
     
  8. May 24, 2017 #28

    nealtw

    nealtw

    nealtw

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    You can still find these new.

    miter.jpg
     
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  9. Jun 16, 2017 #29

    Mastercarpenty

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    I'm late to the party as usual.

    @ the OP, if only the bottom is loose you can fix that by shimming the offending part into tightness, then caulking the wall line as needed. Doesn't look as bad as you'd think. Generally if the top is open, you can use a block on both pieces in the corner and tap both upward together which will close the joint.

    @sparky617 there is a chart from Delta which gives you the saw angles based on the measured angle of the actual corner. Works for 45/45 or 38/52 crown. It only goes in one degree increments but you can 'guess' halfway to the next full degree, With my digital protractor and this chart I can flat cut any crown perfectly anywhere anytime. Once you get used to flat-cutting you'll learn where to 'fudge' the cut slightly to open the back just enough to always keep the front tight, yet still have enough mating to get a solid glue bond. You can't do that trick with a 'bedded' cut.

    Coping usually gives the best results but sometimes the wide stuff is bowed and I find that generally works better flat-cut and miter-jointed. Install the the bowed piece first, test fit the other, then wedge out the bow before final joining. If it's bowed out cut the mating piece a little tight to push it in.

    My paint-grade filler, whether for gaps or nails, is MH Ready Patch applied with a putty knife to final shape. Almost zero shrinkage unless really thick, dries rapidly, and a bugger to sand so don't leave any excess behind. Don't leave the can open as it dries just as fast there if you do.

    With the right tools, knowledge, and perspective on how to solve the problems you sometimes run into, running crown is easy but it might take you years to get all of what you need to handle it that well!

    Phil
     
  10. Jun 28, 2017 #30

    1acre

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    also late to the party, but it is important to note that if you don't nail up your crown correctly, it will also throw off your miters and coping. I cope all inside corners. When outside corners are involved, I make cuts and use miter clips to glue the joint together off the wall. Once dried, usually by the time I've made the next cuts and laid it out, it helps to lay up the crown almost perfectly.

    Also, in the first picture, it doesn't look like the miter is off, it was just a measuring issue. Don't measure with a tape, use a folding rule. No numbers to memorize. It can also help to take a cut 2 blocks, one the distance on the ceiling and one the distance on the wall and draw a line all the way around the wall to help lay up the crown better.

    Below is a picture of the first time I cut and did crown. Not perfect, but certainly passable.

    20160828_122028.jpg
     
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  11. Jun 29, 2017 #31

    nealtw

    nealtw

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    Nicely done.:thbup:
     

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