Be sure to take all measurements to the nearest 1/16" using a steel tape measure.  Note any irregularities around the opening of the fireplace, such as projecting or recessed brick, and advise in the comments section of the order form accordingly.  For complex custom applications, a photograph of the fireplace will be very helpful.

There are two types fit, Overlap Fit and Inside Fit. The overlap fit is when the fireplace door is larger than the fireplace opening and the door will overlap the brick, marble, etc.  An inside fit is when the fireplace door fits inside the fireplace opening and will be flush with the brick, marble, etc.  The most common is the overlap fit but if you have rough field stone or bricks protruding or an arch, then the inside fit is what you need.  The inside fit requires more precise measuring and is used with custom enclosures only. All stock doors utilize an overlap fit. In general, you will usually obtain a better fit and easier installation when you use the overlap fit, when possible.

Overlap Fit

Measure the width of the opening at the top and again at the bottom. We need the minimum and maximum width (A). It might be helpful to print this page and use Figure 1 for all your measurements.

Next, measure the height of the opening from the hearth (where the enclosure will sit) to the top of the fireplace opening.  When ordering a Regal or Original door, make sure you do not overlap the opening more than 3 1/4" when using mesh curtains. When ordering a Cameo or Classic door with mesh, indicate on the Custom Order Form the thickness of the lintel bar, as we must allow the mesh angle assembly to clear under the lintel bar. If there is no hearth extension or you have a raised firebox, you will need to overlap the bottom of the opening (picture frame mount).