Crown Radius

How to determine the radius for flexible Crown moulding

For "non-crown" applications see: "How to Determine the Radius for Non-Crown applications"

There are 3 basic types of radius applications:

Inside Radius (Concave)

To calculate the radius of a concave wall you will need to know the width and the depth of the curve. Then use the radius calculator

Outside Radius (Convex)

To calculate the radius of a convex wall:

Use the longest level available that will fit in the space and place it against the wall at the center point of the curve.

Measure the distance from the wall at both ends and adjust the level until the distance is eqaul.

The width is the width of the level and the depth is the distance from the wall at the ends.

Enter the width and depth into the radius calculator

Measure for OSR

Dormer

To calculate the radius of a dormer you will need to know the width and the rise of the dormer. Then use the radius calculator to calculate the radius.

The radius does not have to be exact. The moulding will flex to fit as long as the calculated radius is within an inch or 2.