QED Lab, Inc.

Air leakage testing is one of the most critical steps in ensuring a building’s energy efficiency, comfort, and overall performance. Whether you are working on a small single-zone structure or a multi-million-square-foot complex, proper testing verifies compliance with codes, identifies inefficiencies, and protects long-term investment. In Idaho, where extreme seasonal temperature changes put added strain on buildings, air leakage testing is particularly important to achieve both durability and energy savings. This guide provides a complete overview of testing types, methods, and relevant ASTM standards for projects of all sizes. Pre-Testing and Early Evaluation The process often begins with pre-testing of assemblies, mockups, and partial buildings. By evaluating smaller sections or sample assemblies before the full project is completed, contractors and building owners can identify weaknesses early. This approach saves money and prevents costly rework later in construction. In Idaho’s ...

When it comes to building energy efficiency in Montana, blower door testing has become an essential step for both residential and commercial projects. Whether you’re a homeowner in Billings, a contractor in Bozeman, or a property developer in Missoula, understanding the value of blower door testing can help you meet state energy codes, reduce utility bills, and improve indoor comfort. As a leading Montana Blower Door Testing Agency, we provide professional services to ensure your building is properly sealed and meets the requirements for  Air Barrier Testing  in Montana. What Is a Blower Door Test? A blower door test is a diagnostic tool used to measure the airtightness of a building. It involves mounting a powerful fan in an exterior doorway to either pressurize or depressurize the space. By measuring the amount of air that leaks in or out, we can determine the building’s air leakage rate. During the test, technicians use specialized equipment and software to locate leaks aro...

  Water is one of the quietest and most stubborn enemies of any building. It can slip in around windows, crawl through walls, and even hitch a ride on the roof. Over time, this hidden moisture can cause mold, rotting wood, ruined insulation, and even big-ticket repairs to the foundation. ASTM E331 is the construction standard that helps fight this battle. Knowing what ASTM E331 is and how to use it helps keep your property dry and strong for the long haul. What Is ASTM E331? ASTM E331 is the go-to test method for checking how well windows, skylights, doors, and curtain walls can keep water out. It looks at the entire outer layer of the building, known as the building envelope, to see how it holds up against water when wind and rain act like a team. The test mimics real weather conditions to find weak points in sealants, joints, and the materials used. This test does not measure how a product reacts to a light drizzle. It exposes the structure to wind-driven rain—fast-moving, pres...