• Concealed Condensation / Moisture

Concealed condensation is the most difficult to deal with and can be the most damaging.  It occurs when moisture vapor condenses within the insulation system behind the vapor retarder or in other concealed building cavities.  Potential causes for concealed condensation are as follows:

What are the Effects of Moisture on Metal Buildings?

Moisture from rain, ground water, and concrete all increase the relative humidity in a building and increase the probability of condensation.  Liquid moisture has the potential to create severe problems in metal buildings.

·        Metal and Condensation

Most of the surfaces in a metal building are protected against corrosion/rust under normal operating conditions.  However, when metal parts are exposed to moisture for extended periods of time they can oxidize, become weaker, and shorten the life expectancy of the building.  Even though many surface treatments are applied to ferrous and non-ferrous metals to prevent oxidation, the best protection is to eliminate a key component — moisture.

·        Fiberglass Insulation and Condensation

Fiberglass is the most commonly used thermal insulation in metal buildings.  The presence of condensed water in fiberglass insulation will increase its thermal conductivity and reduce its insulating value.  Fiberglass insulation however, is durable.  If allowed to fully dry and return to its design thickness, fiberglass will revert back to its original insulating value.  (Note: This statement pertains only to thermal performance.  No claims are being made with respect to mold related issues associated with condensation or roof leaks)