building envelope design & construction

Gergen Construction is a private subcontractor for environmental mitigation and building envelope waterproofing systems, specializing in vapor intrusion, methane mitigation, and building envelope waterproofing systems. The site also describes JSS Construction as a union subcontractor for the same services. The company reports over 34 years of experience and 50,000,000 square feet of successful installations, serving industrial, commercial, and residential clients.

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construction managementenvironmental remediation design & constructionestimating & project managementvapor barrier installationwaterproofing installation