was started by Building Science Corporation almost 20 years ago to share knowledge and resources with the construction and design community. BSC has developed the website into a highly regarded portal for free, objective, science-based knowledge.

The project is now in a stage of expansion and BSC has been joined by a growing group of Industry Contributors. Our Contributors play a dual role in the project. First, their contributions support the business infrastructure of the website, allowing us to devote more resources to developing content. Just as importantly, Contributors add depth and breadth to our site by engaging in dialogue about critical building science issues. BSC has invited a staff member from each Contributor - in each case, a recognized industry expert - to contribute to this dialogue. Their industry-specific insider perspectives will complement the expertise of our authors and create a richer reading experience. BSC ensures a consistent high standard of quality in the information provided. For more details, please see Contributor Roles.

We thank the following Contributors for their support of this exciting process.


TAMLYN® was established in May 1971 by Ron Tamlyn, Sr. with $800 borrowed money and help from his wife, Jean, in a small shack in the back yard of their modest home in Bellaire, Texas. We remain family-owned to this day. Our history is one of quality, innovation, and proven performance. We are proud to represent the manufacturing end of the building products industry, and currently source internally, externally domestically, or externally internationally depending on who offers the best overall quality and logistical value.

Our mission is to become a world-class and world-wide supplier of quality building products. We will help build the dream of better homes and buildings, continually innovating, while honoring our heritage as a family business that values all employees, making Tamlyn a rewarding place to work. We will promote positive, lasting relationships with customers, providing excellent products at fair prices with superior service. We commit to be good stewards of our resources to leave Tamlyn in a stronger position for the next generation, passing these values on and bringing glory to God in all we do.

Technical Support Contact:


Tamlyn on


Dörken delivers innovative, high-performance air and moisture barriers for commercial and residential construction sold under the DELTA® brand name. A North American manufacturer based out of Beamsville, Ontario, Dörken Products, Inc. is a subsidiary of Ewald Dörken AG, a leading European developer and manufacturer of waterproofing and drainage products sold worldwide. Dörken is known for delivering premium products while providing educational programs and full technical support. For more information, call 1-888-4DELTA4 (433-5824) or visit Digital press kits are available at

Technical Support Contact:

Technical Services Manager: Krzystof Apriasz 1-888-433-5824, ext. 326 or 

Product Manager: Peter Barrett 1-888-433-5824, ext. 345 or

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Georgia-Pacific Gypsum

Headquartered at Atlanta, Georgia-Pacific is one of the world’s leading manufacturers and marketers of building products, tissue, packaging, paper, cellulose and related chemicals.  The company employs nearly 35,000 people worldwide.  Georgia-Pacific  Gypsum pioneered fiberglass mat gypsum technology in 1986 and, for three decades, inspired fundamental changes in the types of gypsum panels specified for walls and roofing in commercial building assemblies.  Dens® brand interior and exterior products are the #1 architecturally-specified fiberglass mat gypsum panels.  For more information about Georgia Pacific building products visit

The DensElement™ Barrier System eliminates the need for additional water-resistive and air barrier (WRB-AB) when the joints, fasteners, openings, penetrations and material transitions are sealed off with PROSOCO FastFlash® that saves time and money.  The science behind DensElement™ Barrier System allows the WRB-AB to be integrated right into the gypsum core, beneath the fiberglass mat.  With its high permeability, the system can mitigate the risk of damage from moisture build-up in the wall cavity and helps protect against mold growth.  For more information, visit

Technical Support Contact:

Barry Reid 1-404-652-2782

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At the ROCKWOOL Group, we are committed to enriching the lives of everyone who comes into contact with our solutions. Our expertise is perfectly suited to tackle many of today’s biggest sustainability and development challenges, from energy consumption and noise pollution to fire resilience, water scarcity and flooding. Our range of products reflects the diversity of the world’s needs, supporting our stakeholders in reducing their own carbon footprint along the way.

Stone wool is a versatile material and forms the basis of all our businesses. With approx. 10,500 passionate colleagues in more than 35 countries, we are the world leader in stone wool solutions, from building insulation to acoustic ceilings, external cladding systems to horticultural solutions, engineered fibers for industrial use to insulation for the process industry and marine & offshore.

The ROCKWOOL Group has three factories strategically located, in Milton, Ontario, Grand Forks, British Columbia and in Marshall County, Mississippi. All ROCKWOOL factories use world-class technology to produce residential and commercial products, as well as a wide array of industrial and marine stone wool insulation products.

ROCKWOOL demonstrates their commitment to the environment both by producing eco-friendly insulation products and by using green manufacturing processes.  ROCKWOOL constantly strives to reduce their consumption of raw materials and conserve energy in manufacturing their products, including through the use of advanced recycling technologies. ROCKWOOL is also active in several green organizations working towards sustainable development and a greener, healthier planet.

Technical Support Contact:

Please contact ROCKWOOL Head Office at 1-800-265-6878


RDH Building Science Laboratories

RDH Building Science Laboratories is a division of RDH Building Science Inc. At RDH, we have a passion for making buildings better. Whether it's as part of a design team for new construction projects or working with a building owner group to plan for the repair or renewal of building systems, our focus is on helping clients make informed decisions that lead to durable and effective buildings. RDH Building Science Laboratories contributes to that goal by providing high-quality research and development services, as well as guideline documents and training.

RDH Building Science Laboratories' main office is in Waterloo, Ontario, with additional locations in Vancouver, British Columbia, and Oakland, California. We also conduct and support field research at client-specific locations across North America. Our research work is wide-ranging: we assist manufacturers with product development; we design and conduct advanced material properties tests; we undertake major research programs with government and industry partners. Each project is approached as a unique challenge, requiring a solution tailored to the needs of our clients and partners.

Technical Support Contact:

Please contact our Waterloo office at 519.342.4731

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TopBuild Home Services

TopBuild Home Services is a home performance leader. The company offers a national, turnkey home performance program to residential builders through the Environments For Living® and Environments For Living Certified Green® programs.

The Environments For Living® program provides a complete package of services to builders in applying the principles of building science to new home construction. By focusing on the home as a system of systems, the program helps builders construct homes that are more energy efficient, comfortable and durable than conventional code‐built homes.

The Environments For Living® program is prescriptive and performance‐based, and does not require builders to use any particular manufacturer's product. Builders must follow specific requirements for tight construction, fresh air ventilation, improved thermal systems, rightsized HVAC equipment, air pressure balancing, internal moisture management and combustion safety.

The Environments For Living Certified Green® program adds requirements for indoor water conservation and lighting and appliance efficiency, for enhanced homeowner and environmental benefits.

Technical Support Contact:

Dave Bell, or 1-386-763-4955

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Huber Engineered Woods LLC

Among the largest privately held companies in the United States, the J.M. Huber Corporation combines imagination, inspiration and innovation to enhance the performance of thousands of consumer and industrial products across a variety of industries. A family-owned company, Huber’s profitable growth has spanned three centuries and six generations and has resulted in a diverse portfolio of businesses.

In the construction industry, Huber Engineered Woods (Huber) is the recognized leader in specialty engineered woods in the United States. Huber combines its advanced adhesives and wood product technologies with state-of-the-art manufacturing capabilities. The result is innovative products like AdvanTech® flooring and ZIP System® sheathing, which combines the benefit of a structural panel with a built-in overlay that serves as both an air barrier and moisture barrier. As well, Huber custom-manufactures unique products with special performance characteristics for customers in both residential and commercial construction.

Huber Engineered Woods brings together a team of professionals with experience in research and development, building science, technical services and manufacturing to create solutions for specific problems. Their combined expertise has resulted in Huber’s solid reputation as a responsible and innovative supplier of quality products to industrial users and the building industry.

Technical Support Contact:

1-800-933-9220 (8:00 AM to 5:00 PM EST Monday through Friday)

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Dow Building Solutions

Dow Building Solutions has a 60+ year legacy of providing energy saving solutions to the global commercial and residential construction industry, which began with the launch of its flagship STYROFOAM™ Brand Extruded Polystyrene (XPS) Foam Insulation, one of the most recognized brands of insulation in the world. A market-facing business unit of The Dow Chemical Company, Dow Building Solutions offers unsurpassed building science expertise to help builders, designers, architects and home/building owners reduce energy costs and protect against wind, rain and moisture, while contributing to the reduction of greenhouse gas emissions. More information about Dow Building Solutions can be found at

Technical Support Contact:

1-866-583-BLUE (2583)

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