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High humidity in a tight building enclosure

2011 mid-rise wood frame apartment building with aluminum windows. There is evidence of high condensation. Windows have thermal breaks and IGU is per code.

There are units which have not required any heat at all this winter. Building finish is EIFS.

Where is the moisture coming from? What is the best way to deal with any condensation?

Asked by Timothy Gooding
Posted Jan 26, 2013 12:15 AM ET
Edited Jan 28, 2013 7:47 AM ET


1 Answer

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Q. "Where is the moisture coming from?"

A. Normal human activities like breathing, cooking, showering, and watering houseplants.

Q. "What is the best way to deal with any condensation?"

A. Install and use a mechanical ventilation system. More information here:

Rating Windows for Condensation Resistance

Designing a Good Ventilation System

Answered by Martin Holladay, GBA Advisor
Posted Jan 26, 2013 6:45 AM ET
Edited Jan 28, 2013 7:49 AM ET.

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