1. Excessive body perspiration buildup that cannot evaporate in moisture-saturated air
2. Condensation dripping from cold-water pipes
3. Warping and sticking of furniture and doors
4. Mold and mildew, which can cause fabrics, books, and furnishings to develop mustiness
5. Clothes moths, fleas, cockroaches, woodlice, millipedes, and dust mites, which thrive in damp conditions