The use of de-icing salts can significantly reduce the service life of concrete transportation structures by causing corrosion of the reinforcing steel. This Update provides guidance on controlling corrosion, drawing on a ten-year study to assess the performance of eight commercial corrosion-inhibiting systems on a concrete highway bridge.
This Update presents the results of research on smoke movement through HVAC systems and the effectiveness of duct smoke detectors. It provides guidance to practitioners and regulatory authorities in the context of North American code requirements for such detectors.
This Update discusses the results of a research project that examined the impacts of two types of high-performance window glazing (low solar heat gain and high solar heat gain) on energy consumption in residential applications.
Selection of proper materials is essential to the construction of basements that will provide liveable and comfortable indoor space. This Update discusses some of the key materials issues in basement construction and reviews the options regarding available materials and methods, including recent developments that enhance performance and efficiency.
Proper site grading and foundation drainage strategies are required in order to prevent water damage to basements and their contents. This Update reviews current construction practices used for basements, discusses some of the key issues and deficiencies that lead to problems, and provides practical suggestions for improving drainage and construction.
This Update presents information critical to the successful application of repointing mortars for the conservation of older masonry buildings .
Permanent damage to older masonry walls and premature failure of repointing work can result from improper selection and application of repointing mortars. This Update describes key design elements for achieving successful repointing of masonry walls to provide a longer service life for both the masonry units and the mortar.
This Update explains how an emphasis on system performance can achieve good sound insulation in multi-family buildings in a cost-effective manner. It reviews the concepts and terminology used to describe sound insulation for the complete building system, and presents research results that illustrate how typical wood-frame construction details can determine the sound insulation actually achieved.
Providing good indoor air quality (IAQ) and thermal comfort is important for employee satisfaction, well-being and performance. This Update provides guidance on key issues for achieving adequate indoor air quality and thermal comfort in open-plan offices, based on current standards and research conducted by NRC’s Institute for Research in Construction and others.
There is increasing interest in the garden roof system as a sustainable building design option in North America today. This Update reports the results of a field study to evaluate the thermal performance of this technology, as well as its potential to retain storm water runoff.