David Lengeman

Certified Passive House Tradesperson, specialised in Building Envelope

General Contractor

Green Rock Contracting

192 Sides Mill Road
17579 Strasburg
United States of America

Phone: +1 717-344-1968

Initial by Exam

Certificate valid from July 24, 2019
Certificate valid until July 24, 2024
The certificate only applies to this person.

Examined by Green Building Alliance at Pittsburgh, United States of America