Sweating Roof Problems

Metal roofs are known for this with condensation forming particularly at the beginning and end of a day.

Sweating roof problems.

It can lead to roof leaks even if rain has not occurred for several days. Condensation on metal roofs can be a problem once the weather starts to get cold. Condensation happens when moisture filled air contacts anything that is below the dew point temperature. Although the use of the completely impermeable and the selectively porous roofing styles may cause roof condensation problems it is actually very important and somewhat indispensable.

Moisture can be increased by the occupants if they are for example running a laundry or doing some other activity that produces more than average moisture in the. As it cools it can t hold as much moisture. Picture a cloud of moisture floating overhead between the rafters. If your roof deck or insulation is developing water droplets chances are your forehead is too.

Essentially condensation occurs at night when the temperature inside a building is warmer than outside. If excessive sweating has no underlying medical cause it s called primary hyperhidrosis. Later designs such as the use of selectively permeable membranes are also not immune to the effects of roof vent loft condensation problems. Roof condensation is a thorny but fairly common problem.

If the excess sweating is due to an underlying medical condition it s called secondary hyperhidrosis. That excess moisture ends up as drops of condensation on the roof. Warm wet air rises and meets the cold roof and cools. Although moisture problems in the roof assembly can be due to waterproofing deficiencies don t neglect the effect of condensation.

Primary hyperhidrosis may be at least partly hereditary. It happens when excess sweating is not triggered by a rise in temperature or physical activity.