94. How do I test for Insulated Glass / IG Seal Failures?

Insulated glass consists of two or more pieces of glass which are bonded to, yet separated from, one another by a spacer bar. The space between the glass panes is an insulator by virtue of “dead air space”. This fabricated glass sandwich is glued together with sealants designed to keep the glass together and moisture out. The spacer contains a dessicant that removes moisture which might be residual from actual manufacture. Insulated glass seal failure occurs when moisture penetrates the edge seals and wets, or condensates within the air space. Condensation between glass panes is a real “eye-sore” for homeowners.

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