The architect or contractor should warn the owner of any precautions
to be taken against the specific hazards in installing the roofing
Soldering of sheet metals, for instance, can be a fire hazard,
either from the open flame or from overheating and undetected
smoldering of the wooden substrate materials.
Thought should be given to the design and placement of any modern
roof appurtenances such as plumbing stacks, air vents, or
TV antennas. Consideration should begin with the placement of
modern plumbing on the interior of the building, otherwise a series
of vent stacks may pierce the roof membrane at various spots creating
maintenance problems as well as aesthetic ones.
Air-handling units placed in the attic space will require vents
which, in turn, require sensitive design. Incorporating these
in unused chimneys has been very successful in the past.
Whenever gutters and downspouts are needed that were not
on the building historically, the additions should be made as
unobtrusively as possible, perhaps by painting them out with a
color compatible with the nearby wall or trim.