“A better built cabinet” Steve Latta (cove moulding question)
user-4361122
| Posted in General Discussion on
I’m wanting to make cove crown moulding in cherry for a small room and saw the table saw technique for cove moulding in the latest issue of FWW.
I can make the cove part ok but I’m having difficulty getting the angles right so the piece fits at a 90 degree angle to the ceiling and wall. How do I figure out the angles? The Article shows dimensions but not angles for this detail.
Replies
What do you mean by "fits at a 90 degree angle to the ceiling and wall"?
The angle of the ceiling to the wall is (in theory) a square 90. Your cove will fit against both the ceining and the wall, so the sum of the angles on those edges need to add up to 90, and the angles of the whole assembled triangle (wall, ceiling, molding) need to add up to 180.
If you make the molding-wall and molding-ceiling angles equal you have 90+45+45=180 The 45's are cut using the flat back of the cove as the reference plane. To mount the molding at a steeper or shallower angle measure one angle and do the math for the other.
The sum of the two angles will equal 90. As an example:
Almost all store bought crown molding these days comes in 3 basic angles. If you look at the molding in position against the wall and ceiling, the flat back will either be at 38 degrees to the wall, 45 degrees, or 52 degrees. Generally, the 52 degrees would be used in a room with very high ceilings.
Crown molding with the 38 and 52 degree angles are so typical that most miter saws have detents at 31.6 degrees and 33.9 degree bevel settings used for 90 degree corners.
Thanks, “Use the flat back of the cove as the reference” That makes sense. I was trying to go about it by thinking in terms of the cove face as a reference. More obvious now that you pointed that out. Thanks !!
This forum post is now archived. Commenting has been disabled