I'm thinking this would have an arched top (as with an arched dormer) but
with continuous metal (probably lead/zinc) cladding featuring prominent seam
detail (ie the barrel hoops).
Anyone agree/disagree with this definition?
Only to the extent that you allow for the vault to be stilted on vertical
side walls. If _I_ were naming something a "barrel dormer" it would be only
semi-cylindrical and I'd come up with a different name for a dormer with a
half round top and straight wall sides.
If I were...
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