Roof Leaks, Water Intrusion: The calls are already beginning to come in. Sometimes, despite the best maintenance efforts, roof leaks will occur during heavy rains. Rainwater may intrude through weather cracks in sealants, deteriorating flashing, window seals, skylight seals, and so on.
Of course, the first and most important step is to identify and correct the source of the leak. Then, however, the real work often starts. Whenever water intrudes INTO a building, wet materials must somehow be addressed. Carpet can usually be dried - or lifted and dried - in place. Similarly, older plaster (not gypsum) walls can often be dried in place by penetrating the wall with small holes and directing fans into the wall space, but only if there is no insulation in that wall space.
Wallboard, however, must be removed along the base of impacted walls PRIOR to ventilating the wall space. The reason: water collects along the base of the walls. Left alone, mold will form in the wall space and will become heavy within 3 to 5 weeks.