Please follow the guidelines below for Extension Base requirements:

Extension Base details for all Cupolas (except Castle Cupolas):
For up to and including a 10/12 roof pitch, no extension base is required.
For up to a 12/12 roof pitch, 1 Extension Base is required.
For up to a 14/12 roof pitch, 2 Extension Bases are required.

Extension Bases for Castle Cupolas:
For up to and including a 12/12 roof pitch, no Extension Base is required.
For a 14/12 roof pitch, 1 Extension Base is required.
For a 16/12 roof pitch, 2 Extension Bases are required.


We also offer screening and primer options.


Additional Cupola Notes: