• Building Envelope Consultants and Scientists


When thinking about the building envelope, you really need to consider the building’s full enclosure. When it comes down to the problems Owners, Managers, Architects, and Contractors spend their time trying to repair or replace roofs, walls, and windows. The enclosure is a tightly connected system and sometimes a single problem with one may be caused by the other.

BECS understands how these systems affect one another and how they work together to keep the outside out and the inside in. Our staff of registered engineers and architects, building scientists, and roofing/waterproofing consultants will assist with the assessment to help identify the problems and work with our clients on a pragmatic repair path.


There is a wide array of roof systems in use for a wide variety of building types. BECS employs Registered Roof Consultants and Observers, certified by the International Institute of Building Enclosure Consultants (IIBEC), who are experts in the assessment, diagnostics, design/specification, and testing of roof components. BECS can provide Clients with maintenance and repair recommendations to extend the service life of a roof and specify a roof replacement strategy.

  • Single-Ply Roofs
  • Modified Roofs
  • Built-Up Roofs
  • Metal Roofs
  • Steep & Low Slope Roofs
  • Green Roofs


OSHA’s Final Rule

BECS’s expert staff can also assist with evaluating loading requirements for new roofs or the transition of an existing roof to a green vegetative roof. Additionally, as part of the rooftop focus, BECS can assist with the evaluation and certification of rooftop anchors. Read more about rooftop anchors and OSHA’s final rule.


A wall’s primary purpose is keeping the outside out. Walls are constructed to control water. Mass walls, as an example, utilize their thickness and material to prevent water infiltration while wicking the water out overtime to dry. Cavity walls use a cavity between the interior and exterior walls to migrate penetrating water to a flashing or drainage system. When walls are not properly maintained, water infiltration and corrosion will soon be problematic – a little water can do a lot of damage.

BECS has the experience to investigate and assess wall systems to give Owners, Managers, and Contractors the big picture of the issues while offering pragmatic solutions. Additionally, BECS can develop a maintenance plan to help keep your structures protected.


Windows and fenestrations may be the largest source for building envelope issues. A properly constructed wall is to keep the outside out, yet a fenestration is a hole in that wall. Without proper knowledge of the envelope’s construction and attention to detail, the window may leak water and air into the interior.

BECS understands the complexity of windows, sloped glazing systems, and other fenestrations. We can provide you with support for renewal or replacement programs through design, mockups, and prototype testing. Our consultants, architects, and engineers will provide you with a path forward for identifying window materials, project phasing, as well as historical considerations (Hint, not all historic windows need to be replaced). BECS’s ability to provide field testing that separates us as we are able to execute a variety of testing to identify how the window will perform.

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