RDH Building Science Laboratory

Research at RDH Building Science Laboratories (RDH-BSL) is wide-ranging—from R&D projects that help manufacturers with product development to major research programs that help government and industry partners answer fundamental questions or address large-scale issues. Each project is approached as a unique challenge, requiring a tailored solution.

We undertake these projects in our two laboratory facilities and at field research sites in multiple climate zones across North America. Our staff includes highly trained and experienced researchers and technicians who understand the behaviour of assemblies, components, and materials, as well as the construction and design-related issues that impact performance.

In addition to laboratory and field research, computer-based modeling is an indispensable tool. We analyze and extend measured results using various modeling programs, including two- and three-dimensional heat flow programs (THERM, HEAT 3D), hygrothermal modeling software (WUFI Pro and WUFI Plus), and other in-house proprietary software. Many projects include several phases to allow validation of modeled results with measured data.

RDH-BSL is known for our advanced building science knowledge and in-depth material testing capabilities. Often, we start with a standard test and then refine it for the client’s actual needs. In some cases, we have developed completely new processes and equipment to answer a challenging or novel question. However, we also conduct standardized ASTM tests, and are a trusted source of reliable test data.

Our experience in testing and equipment design has also led us to design and build test equipment for others. Some of our products include relative humidity, moisture content, and temperature sensors, as well as vapor permeance trays. More customized and large-scale equipment includes mobile test huts and climate chambers. The design and fabrication process for these components has been refined by building scientists and skilled technicians to ensure accuracy and durability, including under field conditions.

At RDH-BSL, we’re constantly striving to understand and meet industry needs. We’re on site, learning through hands-on experience, and also in the lab and the field, conducting wide-ranging research on building performance. We are always asking “why” so we can share new insights with others in the fields of building science, construction, architecture, and design.

This sharing takes a number of forms, for example: developing clear, practical guides; leading seminars, webinars, and other online and offline events; developing curriculum packages and training materials; and writing for a wide range of industry publications. We make many of these resources available through our Technical Library.

All of our capabilities are put to use in forensics. RDH-BSL is regularly called upon to investigate challenging cases and conduct testing and failure analysis for litigators, builders, property owners, and construction product manufacturers. Whatever a building failure involves—from moisture to comfort complaints, from mold to faulty HVAC systems—we have the experience and knowledge to find the root of the problem. Our in-house research and testing capacity, as well as our highly trained and knowledgeable staff, allows our team to see beyond the obvious to identify underlying causes.

Once investigation or testing is complete, the next step is explaining what we found. Whether providing lab test results, expert testimony, or more extensive documentation, we help our clients gain clarity on what went wrong and why. Our deep understanding of the science behind how buildings work, and our ability to communicate that knowledge, is what sets RDH-BSL apart.