It is a good idea to get an expert opinion. It is difficult to estimate roof age accurately from the ground unless the roof is either very new or very close to the end of its lifespan. You also need to know how many layers are under it in order to determine if the roof needs to be completely stripped before installing the new shingles. Excessive moisture from unvented bathrooms and cooking areas can damage plaster, promote the growth of mold and fungus, deteriorate windows and cause allergic reactions. These problems need to be corrected before the damage becomes excessive.
Repairs are usually simple and inexpensive.
It is important to discuss these potential hazards with a professional and arrange for a specialized inspection if necessary. Copyright 1999, 2000.