Weathertight Building Consulting, LLC (WTBC) is a quality-oriented building enclosure consulting firm headquartered in Houston, Texas. WTBC is primarily focused on design, commissioning, and third-party consulting for building enclosure systems. WTBC was started in 2021 by Christian Ozbun, a licensed architect specializing in building enclosure consulting. Christian Ozbun has over 15 years of relevant experience.

Services Provided:
Consulting
•	Peer Review
•	Design Assist
•	Construction Observation
•	Assessment of Existing Roofing, Facades, etc.
•	Due Diligence Assessments
•	Building Envelope Repair Design
•	Below Grade Waterproofing Design
•	Roof Replacement Design

Testing
•	ASTM E1105 – Static Differential Pressure Window Testing
•	ASTM E783 - Quantitative Air Leakage Window Testing
•	AAMA 501.2 – Nozzle Water Testing
•	ASTM E1827 – Quantitative Air Barrier Testing / Whole Building Air Pressurization Testing 
•	ASTM E1186 - Diagnostic Air Barrier Testing
•	ASTM D4541 – Coating Adhesion Testing
•	ASTM C1521 – Joint Sealant Adhesion Testing
•	ASTM D7877 – Electronic Leak Detection
•	ASTM E1827 – Blower Door Testing
•	ASTM D7954 – Moisture scanning via Impedance Scanner
•	ASTM E907 – Wind Uplift Testing of Adhered Membrane Roofing Systems

Forensic Consulting
•	Expert Witness
•	Destructive Testing
•	Water Infiltration Testing
•	Infrared Thermography
•	Moisture Scanning
•	Roof Coring

Weathertight Consulting

Org chart

Teams

Offices