It may be necessary to carry out an immediate and temporary stabilization
to prevent further deterioration until research can determine
how the roof should be restored or rehabilitated, or until funding
can be provided to do a proper job.
A simple covering of exterior plywood or roll roofing might provide
adequate protection, but any temporary covering should be applied
One should be careful not to overload the roof structure, or
to damage or destroy historic evidence or fabric that might be
incorporated into a new roof at a later date.
In this sense, repairs with caulking or bituminous patching compounds
should be recognized as potentially harmful, since they are difficult
to remove, and at their best, are very temporary.