Carpenters- What is the correct angle to install crown molding in a square room?

Question

Is there any trick to getting the cuts right??? Thanx!!

Answer 1

If it is perfectly square, then it is 45 degrees.  However, I have never met a wall which is perfectly square.  What you need to do it cut some short test pieces, then put them in the spot where the normal pieces will go.  If they don't fit, then adjust the angle on the saw.   Hopefully, you know to cut crown molding, it has to be upside down and tilted so the part which touches the wall and the ceiling rest against the bottom and side device you are using to cut.

Answer 2

depends on where the cut is. an outside corner? inside corner? its fairly simple math but you need to post more details. Most likely you will be dealing with 45 degree angles

Answer 3

Yes, there is a trick to getting the cuts right.  It simplifies the process of cutting crown immensely

1.  Take a small piece of crown and hold it inside the corner of a framing square so that the flats are tight to the square.

2.  Take note of where the outside point of the top of the crown hits the square (the bottom of the crown is the edge with the cove).

3.  Draw a line across your miter saw at the above number (for example, 3-3/8").  This number will vary depending on the crown you use.

4.  Hold your piece of crown UPSIDE DOWN against the fence, with the front edge on the line.  Swing your miter to 45 degrees to cut the miter for a 90 degree corner.   However, as another poster said, there are going to be few if any corners in your house that are true 90 degrees.  Use a bevel gauge to scribe the angle, and then split it (92 degrees = 46 degree miter).  

5.  Snap a line on the wall (BLUE chalk) where the bottom will hit.  You can get this number from the other side of the framing square.  Set the crown to this line to keep it straight.

Cope your inside corners and glue and nail your outside corners.  It will look great when you get done.  Good luck.

Answer 4

i agree with wood-tic's answer that is on the money i would have given the same advice

dx-builders

Answer 5

If you've never done it before, you may be money ahead by buying corner blocks.  They are made for inside corners and outside corners.   They also make some for the middle runs of crown.  This simplifies the process greatly because now you don't have to cut angles at all.  Just nail the corners in and but the crown up against them.  I personally like it better.   Gives it a more victorian look.

Answer 6

Pretty sure they are all basically a 45 degree angle.