Building Envelope Commissioning (BECx)
Building Envelope Commissioning (BECx) is a structured, proactive process that confirms your building envelope will perform as expected. At Inspec, we help design teams, contractors, and owners meet energy codes and moisture control goals—while avoiding costly surprises later.
What Is Building Envelope Commissioning (BECx)?
BECx is a third-party quality assurance process that reviews and validates building envelope components—like walls, windows, roofs, and waterproofing. It uses national standards (ASTM, ASHRAE, NIBS) to ensure assemblies meet air, moisture, and thermal control expectations. In short, BECx helps prevent envelope failures before they occur.
This service is required by many projects seeking LEED, IgCC, or energy code compliance, and it’s a smart investment for high-performance buildings.
Why BECx Matters
- Confirms envelope systems are airtight and water-resistant
- Helps avoid costly repairs caused by water intrusion or mold
- Supports LEED v4, IgCC, and ASHRAE 90.1 compliance
- Improves thermal performance and comfort
- Documents system performance for warranty and closeout
What Our BECx Services Include
- Design-phase reviews and envelope detailing support
- Mock-up evaluations and on-site installation oversight
- Envelope testing for air leakage and water resistance
- Thermal modeling and performance analytics
- Final commissioning documentation and verification
Case Study: Government Facility BECx
Goal: Achieve LEED v4 envelope commissioning for a $70M government building
Approach: Reviewed envelope submittals, led preconstruction meetings, conducted field testing, and documented results per NIBS and ASTM guidelines
Result: The building passed all tests on the first attempt and secured LEED Gold certification
Explore Related Services
We follow ASTM, ASHRAE, and NIBS (National Institute of Building Sciences) guidelines to deliver BECx services that are defensible, repeatable, and performance-focused.
Frequently Asked Questions
BECx is a structured quality process that verifies building envelope systems—such as walls, roofs, and waterproofing—perform correctly before and after construction.
Ideally, BECx starts during the design phase so potential problems can be corrected before construction begins.
Yes. Common BECx testing includes air barrier verification, window water testing, thermal scans, and field mock-up evaluations.
Yes. Many LEED, IgCC, and ASHRAE standards require BECx as part of the envelope verification process.
BECx reduces risk, improves energy performance, and provides clear documentation for warranties and future maintenance.