Jul 30, 2004I'm not sure why they sweat, could be the humidity level of the basement (67) or from the natural gas. However, all basement walls appear dry most of the time. The basement is unfinished, so it's not being used as a living space. The gas pipes are running across the ceiling above the basement, directly underneath the first floor joists. Dec 07, 2009If so, I would suggest you insulate the pipes, because you are paying to heat up water that is loosing temperature along the pipes, when they are in contact with cold basement air. If the cold Lower the basement humidity to protect your health and all the things in your basement. The two cold water pipes, with one sweating and the other not, is likely indicating water flow. The sweating pipe is carrying all the new, cold, water flow from the relatively cold ground outside, and the dry pipe is carrying little or no water flow. The truth is, pipe sweating is just an indication of extreme dampness or humidity in your basement. Even when there are no leaks in your basement, large amounts of water vapor can enter it, and, eager to become water again, latches on to any cold surface around. You guessed it right water pipes. Sweating occurs when the water inside the pipe is much colder than surrounding humid air. During the summer, the surrounding air is naturally hot; in winter, the air is heated by the furnace. In either case, when warm, humid air reaches cold pipes, drops of moisture form and drip as if. Mar 30, 2006Best Answer: It's because the cold water in the pipes cools the pipes to a temperature lower than the dew point of the surrounding air. Dew point is that temperature at. Sweating pipes occur when the water inside the pipe is colder than the humid air surrounding it. While this may seem like a problem exclusive to summer, it also happens when were heating our Portland homes in winter. When warm, humid air meets cold pipes, moisture beads on the outside of the pipe. Jun 11, 2011Foam pipe insulation sleeves prevents condensation on plumbing. Prevent damage to carpets and the basement floor during the summer months. Aug 28, 2011The warmer air temperature and excess humidity in the air meet with the cold walls of the pipe through the process of convection and condensation begins to form, sometimes in large enough amounts to leave puddles on the floor or, in this case, a water trail (see picture below). It might not sound like it, but condensation on ductwork can be a serious problem, causing all sorts of secondary problems like leaking ceilings and mold infestation. You might not think that this is an issue that people in Santa Clarita have to deal with, but most people with condensation on their air ducts dont even know about it. Aug 22, 2008Sweaty walls and pipes likely signal trouble. The concrete in your basement walls and floor will absorb the heat from the exterior temperature in the summer, which makes it warmer that your conditioned air. When the air in your basement meets the concrete wall, the moisture in it will condense and your walls will sweat. Pipes and tanks don't literally sweat. Water pipes do not sweat as people say water is not exuding out of pores in the pipe. Water is condensing from moist air onto the surface of the cold water pipe. Insulate your cold water pipes to avoid condensation and drips onto the floor. Cover cold water pipes with inexpensive foam pipe insulation to prevent condensation and dripping in humid weather. Pipe sweating is just one symptom of excessive dampness. Even basements that have never had a visible water leak share the misery water vapor in the ground virtually forces large amounts of water vapor through the floor and foundation walls.