#window testing

[qedlabsblog]

The building has never leaked. So why are we spraying water directly at the windows?

Because waiting for the first leak isn't much of a strategy.

ASTM E1105 field testing is designed to evaluate how an installed window system performs under simulated wind-driven rain.

The goal isn't to prove a building has a problem.

It's to find hidden weaknesses before they become expensive callbacks, repairs, or occupant complaints.

A building can look complete. A window can look perfectly sealed.

But water has a way of finding the one detail everyone overlooked.

Sometimes the best time to discover a leak is before anyone else does.

[qedlabsblog]

Your building can be 99.9% airtight and still fail the air barrier test.

Why?

Because air doesn't need a big opening. It only needs one weak detail.

A missed seal around a pipe.

A tiny gap where the roof meets the wall.

An overlooked transition between two building materials.

Those small details can allow enough air leakage to affect the entire building's performance.

That's why air barrier testing isn't about finding big construction mistakes.

It's about verifying that every part of the building envelope works together as one continuous system.

Sometimes the smallest gap on the project becomes the biggest item on the punch list.

[qedlabsblog]

A building can look complete and still leak air. ASTM E779 helps verify how airtight the building envelope really is.

[qedlabsblog]

A window can pass every lab test...

and still fail after it's installed. that isn't a flaw in the certification.

It's because laboratory testing only measures the window itself under controlled conditions.

It doesn't test the flashing, the sealant, or the installation. those parts happen on the job site, and they can completely change how the window performs.

That's why two identical, certified windows can behave very differently on the same building.

it's also why field testing exists. lab testing answers one question:

Does the product perform? field testing answers another:

Does the installed system perform? those aren't the same thing.

[qedlabsblog]

Air leakage testing is a diagnostic process used to measure how much air escapes from a home and where those leaks occur. Unlike visible problems such as cracked walls or broken windows, air leaks are often hidden behind drywall, around framing, or inside attic and crawl spaces.

[qedlabsblog]

Air leakage in buildings is a common but often overlooked issue. Small gaps and cracks in walls, windows, doors, and roofs can cause significant energy loss, higher utility bills, and discomfort for occupants. Air Leakage Testing helps identify these problem areas, ensuring that homes and commercial properties remain energy-efficient and comfortable.

[qedlabsblog]

Energy efficiency is a top concern for homeowners and commercial property managers alike. One of the most overlooked causes of high energy bills is air leakage. Even small cracks or gaps in walls, windows, doors, or roofs can allow conditioned air to escape and outdoor air to enter, making heating and cooling systems work harder. Air Leakage Testing is a specialized service that identifies these problem areas, helping property owners save money while maintaining a comfortable indoor environment.

[qedlabsblog]

Maintaining energy efficiency in residential and commercial buildings is a growing priority for homeowners, builders, and property managers. One of the most effective ways to measure and improve a building’s airtightness is through Blower Door Testing. This specialized service identifies leaks in the building envelope, helping reduce energy waste, lower utility bills, and create a more comfortable indoor environment.