Chicago Window Expert Nobody knows more about windows.
  • Construction Expert Services

    Mark Meshulam LLC, a.k.a. Chicago Window Expert provides the following range of construction expert services:


    Construction Consultant

    Mark Meshulam, the Chicago Window Expert is a Construction Consultant. He has 40 years of experience in construction. This includes contracting, laboratory and field testing, forensic investigations, claims and expert witness work. He specializes in …

    Glass Consultant 

    Window glass is an important and complex subject. Glass is in nearly every building, but sometimes it performs better than other times. Architects, engineers and building owners face difficult challenges when confronted with deciding how to specify window glass for…

    Window Consultant

    Windows are an important part of nearly every building.  Architects, engineers and building owners face difficult challenges when deciding what type of windows to use. We consult with…


    Water Testing for Windows and Curtainwalls

    We bring our portable test equipment to your building anywhere in the world. Our water leak test reporting is clear and illustrated with photographs. For diagnostic testing, we can customize test methods. This can accelerate the process and provide very…

    Air Infiltration Testing for Windows and Curtainwalls

    We bring our portable test equipment to your building anywhere in the world. Reporting is clear and illustrated with photos. Diagnostics of excessive air infiltration are also available. These tests are performed for checking air infiltration is windows and curtainwalls: ASTM E783 …

    Condensation Testing

    Condensation at windows and in buildings requires a multi-disciplinary approach. Condensation may result from cold windows, very moist air or both. Often, more than one aspect is out of balance, bringing about a…

    Insulating Glass Dewpoint Testing

    We bring portable test equipment to your project to test the dewpoint  inside your insulated glass units.  The test method is ASTM E546 – 08 Standard Test Method for Frost/Dew Point of Sealed Insulating Glass…

    Masonry Moisure Testing

    Testing water leaks in walls made of masonry as well as other materials requires an understanding of how the leaking wall was built. Is there a second layer of masonry? Is there a house wrap or vapor barrier? Are there flashings at key areas and how well…


    Expert Witness: Window Falls

    Each year hundreds of window falls happen, often to children. Window falls can be fatal. We utilize our extensive experience as a glazing contractor to find the causes of the falls and who is responsible.

    Expert Witness: Glass Injury

    Each year thousands of people are hurt when glass breaks. Glass injuries can be disfiguring or fatal. Glass injuries occur with window, storefronts, mirrors, and shower doors. We utilize our extensive experience as a glazing contractor to determine the…

    Insurance Claim Investigation

    Insured parties and claims adjusters alike can find issues regarding windows, glass, and facade difficult to unravel. In these cases, the cause of the loss may be difficult to establish or refute without experience of an insider in the window & glass industry…

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Caulking & Waterproofing
Now offering caulking, tuckpointing and waterproofing services in selected areas. Contact
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Photo of the day

Composite panels are about 1/4" thick. They have outer skins of thin aluminum and a core of polyethylene, similar to the material plastic milk bottles are made from. The panels are made from large flat sheets by a local fabricator to fit the project.


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