Cupola Sizing

You want to be sure the Cupola(s) you buy will fit your building or structure appropriately. Here are some proportion guidelines for purchasing the right size metal Cupola for your metal roof, barn, shed or garage.

Improperly Sized

Properly Sized

Properly Sized

Cupola Sizing Diagrams Based on Your Roof Size

These diagrams are designed to help you determine the proper size cupola for your building. A general sizing suggestion is a minimum of 1.25" of cupola for every foot of unbroken roof ridge line. For 2 or 3 cupolas use 1.5", and for 4 or more cupolas use 1.75".

Cupola for a 24ft Garage

For a 24' long building the recommended size of cupola would be 36" or greater. One diagram shows a 24" cupola which appears too small.

Cupola for a 36ft Roof Length

For a 36' long building the recommended size of cupola would be 48" or greater. This diagram shows a 48" cupola which appears porportioned properly.

Cupolas for a 60ft Roof Length

For a 60' long building the recommended size of cupola would be 72" or greater. A 72" cupola appears large enough but two 48" cupolas seem to be proportioned better.

Cupolas for a 120ft Roof Length

Shown here are several different configurations that look properly porportioned for this size building.