previous
  • Energy-Smart Details
    Energy-Smart Details
  • Read FHB on Your iPad
    Read FHB on Your iPad
  • 7 Smart Kitchen Solutions
    7 Smart Kitchen Solutions
  • How to Install Housewrap Solo
    How to Install Housewrap Solo
  • Magazine Departments
    Magazine Departments
  • Buyer's Guide to Insulation
    Buyer's Guide to Insulation
  • All about Roofing
    All about Roofing
  • Video: Build a curved step
    Video: Build a curved step
  • Basement Remodeling Tips
    Basement Remodeling Tips
  • Clever daily tip in your inbox
    Clever daily tip in your inbox
  • 7 Small Bathroom Layouts
    7 Small Bathroom Layouts
  • 7 Trim Carpentry Secrets
    7 Trim Carpentry Secrets
  • Play the Inspector Game!
    Play the Inspector Game!
  • The Hobbit House and More
    The Hobbit House and More
  • The Passive House Build
    The Passive House Build
  • Master Carpenter Videos
    Master Carpenter Videos
  • Shorten a Prehung Door
    Shorten a Prehung Door
  • Electrical Articles & Videos
    Electrical Articles & Videos
  • 9 Concrete Countertops Ideas
    9 Concrete Countertops Ideas
  • Tips & Techniques for Painting
    Tips & Techniques for Painting
  • Deck Design & Construction
    Deck Design & Construction
  • Remodeling in Action
    Remodeling in Action
  • 12 Remodeling Secrets
    12 Remodeling Secrets
next
Pin It

Fitting coped crown molding

Before I made this jig, I checked the fit of my coped crown molding the conventional way by climbing the ladder and holding the coped piece in place against the installed section. This method told me that it was either a good fit or that there was a gap, but it failed to tell me where to remove the material to eliminate a gap. All I knew was that there was a high spot or spots somewhere on the hidden coped surface. I then had to locate the high spots and remove them by trial and error, while chanting those special words carefully selected by carpenters to reflect their degree of frustration.

With the fixture shown in the drawing, I am able to check my coping without climbing a ladder, and if it is not a good fit, I am able to see exactly where and how much material needs to be removed. I simply slide my coped section into the fixture until it engages the sample piece of crown, as shown in the drawing. If a gap exists between their front faces, I view the hidden coped face through the viewing window. This enables me to identify where and how much more fitting is required by the amount and position of the light shining through the gap. (High spots allow no light to show through.) I usually get all the high spots on the first go. The fit is confirmed by a quick recheck on the fixture, and it’s up the ladder for installation.

The installed sample and the guide position can be changed to suit the particular crown molding being installed. Although I use separate left and right jigs, they can be modified easily to check both left- and right-hand coping by duplicating the window component— representing a wall and made of plywood—and attaching it to the front edge of the base together with the installation of a second guide.


Colin Siddall, St. Paul, Alberta, ca