Building Envelope Defects

Apartment Buildings

The envelope is a key aspect of every building. It provides a face to the public that conveys value, it regulates the occupant environment and repels weather. The building envelope is composed of many elements that must work together well: windows, masonry, panels, flashings, sealants, roofing and more.

Too often the envelope fails in one or more of its tasks. Building envelope defects may include water leaks, air infiltration, premature deterioration, operational difficulties, structural failure, solar overloading and gaps in insulation.

Unraveling the often tangled history of building envelope defects, and more importantly, determining responsibility and a solution requires an expert steeped in this discipline. Gogulski & Associates, Inc. has expanded and strengthened our capabilities in this crucial area.

Gogulski & Associates applies several methods in its approach to building envelope defects including document review, history review, infrared thermography, field testing for sealant adhesion, water penetration, air infiltration, insulating glass dewpoint, precise measurement, field surveying and industry review. Depending upon the requirements of the project, Gogulski & Associates may utilize forensic disassembly, and may invent, prototype and test a unique solution.

Glass Breakage Injuries 

Some believe that glass, more than most other building materials, conveys enhanced value, especially in newer buildings. It is not uncommon to see buildings clad entirely in glass, with yet more glass and mirrors on the interior spaces.

The downside of glass is the danger it poses to the public when it breaks. Even tempered glass can break in a way that produces injuries. Even with safety glazing codes and consumer safety standards, glass breakage injuries still occur.

When glass breaks, evidence is often quickly swept away, making forensic investigation more difficult. Gogulski & Associates approaches these issues with a combination of global and focused vision, in order to come to the best possible conclusions about the origins of the injury-producing glass breakage. Microscopic examination, slow motion videography, testing of attachment methods, wind simulations, impact calculations, stress testing and purposeful breakage of similar glass lites are combined with an analysis of code and specification requirements utilized to arrive at the correct opinion.

In addition to such objective methods, our staff has a tactile and intuitive understanding of glass behavior through decades of work with the material.

Corporate Locations

Window Leakage Investigations


When windows leak water or air in an existing building producing damage and discomfort, an expert is needed to get at the root of the problem. The expert will collect "big picture" information, then drill down to the specific leaks as they present themselves.

In most cases a window leakage investigation will involve an analysis of not only the window, but also the surrounding conditions, sometimes all the way up to the roof. With the frequency and pattern of the leaks understood, and an understanding of the building construction, the expert will then develop a test protocol that is appropriate to the building. The protocol will take into account the occupancy of the affected area, the access from interior and exterior, availability of shop drawings and other documents.

If a testing protocol is designed correctly, the testing will produce usable results. The tests will successfully segregate possible points of entry so they can be tested separately. Further, the window leakage investigation will recognize that determining the point of water entry is only half of the equation. The more important half is the analysis and testing of the window's water management system. Gogulski & Associates possesses the experience and expertise required to perform a full spectrum, yet targeted window leakage investigation, and to plot a course for successful remediation.

Window Testing

Extensive test methods and standards are utilized by Gogulski & Associates in the testing of windows and related components:

  • ASTM E 413 Classification for Rating Sound Insulation
  • ASTM E 488 Standard Test Methods for Strength of Anchors in Concrete and Masonry Elements
  • ASTM E 514 Standard Test Method for Water Penetration and Leakage Through Masonry
  • ASTM E 547 Standard Test Method for Water Penetration of Exterior Windows, Skylights, Doors & Curtain Walls by Cyclic Static Air Pressure Differential
  • ASTM E 576 Standard Test Method for Frost Point of Sealed Insulating Glass Units in the Vertical Position
  • ASTM E 754 Standard Test Method for Pullout Resistance of Ties and Anchors Embedded in Masonry Mortar Joints
  • AAMA/NWWDA 101/I.S.2 Voluntary Specifications for Aluminum, Vinyl (PVC) and Wood Windows and Glass Doors
  • AAMA 501 Methods of Test for Exterior Walls
  • AAMA 502 Voluntary Specification for Field Testing of Windows and Sliding Glass Doors
  • AAMA 503 Voluntary Specification for Field Testing of Metal Storefronts, Curtain Walls and Sloped Glazing Systems
  • AAMA 507 Standard Practice for Determining the Thermal Performance Characteristics of Fenestration Systems Installed in Commercial Buildings
  • AAMA 1503.1 Voluntary Test Method for Thermal Transmittance and Condensation Resistance of Windows, Doors and Glazed Wall Sections
  • AAMA 1504 Voluntary Standard for Thermal Performance of Windows, Doors and Glazed Walls
  • AAMA 1600 Voluntary Specification for Skylights
  • AAMA AFPA Anodic Finishes/Painted Aluminum
  • AAMA FSCOM-1 Fire Safety in High Rise Curtain Walls
  • AAMA JS-1 Joint Sealants
  • AAMA GDSG-1 Glass Design for Sloped Glazing
  • AAMA CW-11 Design Wind Loads and Boundary Layer Wind Tunnel Testing
  • AAMA CW-12 Structural Properties of Glass
  • AAMA CW-13 Structural Sealant Glazing Systems
  • AAMA CWG-1 Installation of Aluminum Curtain Walls
  • AAMA GAG-1 Glass and Glazing
  • AAMA MCWM-1 Metal Curtain Wall Manual
  • AAMA SDGS-1 Structural Design Guidelines for Aluminum Framed Skylights
  • AAMA SFM-1 Aluminum Store Front and Entrance Manual
  • AAMA TSGG Two-Sided Structural Glazing Guidelines for Aluminum Framed Skylights
  • AAMA TIR-A7 Sloped Glazing Guidelines
  • AAMA TIR-A9 Metal Curtain Wall Fasteners
  • AAMA TIR-A11 Maximum Allowable Deflection of Framing Systems for Building Cladding Components at Design Wind Loads
  • ASTM C 794 Standard Test Method for Adhesion-in-Peel of Elastomeric Joint Sealants
  • ASTM C 1036 Standard Specification for Flat Glass
  • ASTM C 1048 Standard Specification for Heat-Treated Flat Glass—Kind HS, Kind FT Coated and Uncoated
  • ASTM C 1135 Standard Test Method for Determining Tensile Adhesion Properties of Structural Sealants
  • ASTM C 1172 Standard Specification for Laminated Architectural Flat Glass
  • ASTM C 1184 Standard Specification for Structural Silicone Sealants
  • ASTM C 1249 Standard Guide for Secondary Seal for Sealed Insulating Glass Units for Structural Sealant Glazing Applications
  • ASTM C 1265 Standard Test Method for Determining the Tensile Properties of an Insulating Glass Edge Seal for Structural Glazing Applications
  • ASTM C 1375 Standard Guide for Substrates Used in Testing Building Seals and Sealants
  • ASTM C 1392 Standard Guide for Evaluating Failure of Structural Sealant Glazing