Down forms clumps if exposed to dampness or moisture, and will mildew if left damp. Phenolic resin products may swell slightly under conditions of extreme humidity or perpetual dampness. In common with most other forms of dampness, rising damp is often misdiagnosed in buildings. If the dampness has disappeared, then condensation is very likely the problem. This leads to dampness in substructures such as crawlspaces and basements. Removing water with good drainage will remove any form of dampness. The condition is exacerbated by excessive dampness of the feet for prolonged periods of time. Marine upholstery differs in that one has to consider dampness, sunlight and hard usage. This unserviceability was caused by the levels of rain and general dampness of the area. This caused many problems, such as cracking and dampness. A few corners are prone to dampness due to the ferny rainforest surroundings. Some properties, such as hardness, roundness and dampness, are clearly natural properties. CG limits dampness transmission from footings. Reynolds said that the band's manager Drummond saw them as representing "cold, dampness, darkness". Most forms of dampness can be prevented by thoughtful building design and careful construction.