Today I re-roofed a shed and it took about 5&1/2 hours to properly roof a simple 64 sq.ft. shed. If you want other units here you go:

.64 Brass
exactly 1 Horse squared
about a Boat length or so
nearly 5 cubits by 5 cubits

Was fun, perfect weather, perfectly done.

[Ren] My host is best host!