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  1. #1
    Join Date
    Jan 2011
    Posts
    8

    Default Coping vs. Miter Cuts

    For crown molding I have had pretty good luck just using my compound miter saw for all my corners - both inside and out. But in removing old crown, I see where some of the longer runs have been cut square and the adjoining pieces were coped. Is there a general rule of thumb about when to cope a corner rather than miter it?

  2. #2
    Join Date
    Mar 2008
    Location
    nova scotia, canada
    Posts
    1,522

    Default Re: Coping vs. Miter Cuts

    when i cope inside corners i evaluate three things

    1) what type of wood am i using
    2) how complex is the profile
    3) is it a new home or a old home with plaster

    if im using mdf i mostly mitre, its much more stable than real wood

    if the crown is pretty basic and not a more ornate type which we buy through a trim supplier i will mitre

    with new homes most of the time the walls are square and the drywall is pretty flat so mitres are usually pretty easy, just need a angle finder and maybe one recut to fit it. with plaster walls the plaster is usually pretty funky and uneven which makes it tricker to get the exact angle so i cope. this compounds even more with baseboards. do to the kicker thats installed before the plaster goes on the wall, makes it much harder to get an exact measurement


    as for tools, i use a jigsaw mostly, the odd time if i need more of a back cut ill do it on the table saw freehanding. i know a handful of trim carpenters that use mini grinders equipped with a flap sander to do this though it generates a ton of dust
    fire up the saw and make some dust

  3. #3
    Join Date
    Jun 2007
    Location
    Lansdale, Pa
    Posts
    13

    Default Re: Coping vs. Miter Cuts

    Quote Originally Posted by tandmj View Post
    For crown molding I have had pretty good luck just using my compound miter saw for all my corners - both inside and out. But in removing old crown, I see where some of the longer runs have been cut square and the adjoining pieces were coped. Is there a general rule of thumb about when to cope a corner rather than miter it?
    I prefer coping.

    Simply because it makes a nicer joint and it will not open up over time

  4. #4
    Join Date
    Sep 2009
    Location
    florida
    Posts
    598

    Default Re: Coping vs. Miter Cuts

    I use to cope 100% of the time for many yrs. Ive been doing nothing but Mitering 100% now for the last 13/14 yrs.
    Ive found out I get less shrinkage/movement when the miters are cut tight and glued.
    Gizmo

    Cut it 3 times & it's still to short.
    Inventor of the Miter Master Plus.

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