Looking Back Can Help Sustainability Move Forward

Words: Alan Ahlstrom/Public/News/20101006060000-1.jpg" width="600" height="338" border="0" alt="Brick can play a major role in achieving sustainability goals." />
Brick can play a major role in achieving sustainability goals.
Many of us have spent time exploring different building environments as children and adults. Playing in a barn in the summer, exploring a vacant building, or visiting a church recalls not only visual memories, but sensory ones as well. Recall for a moment, the cool relief of a church interior on a hot day, or the warmth and humidity of the greenhouse on a crisp fall afternoon.

The construction materials that these buildings are made of contribute to their behavior in different climates and add to one’s sense of comfort, whether thermal, acoustical or aesthetic. Buildings that provide the most stable thermal environment are typically masonry buildings.

Humans have a 3,000 year history with brick. It has been in regular use since the ancient empires of Mesopotamia, Rome and China to today’s global societies. There is a reason for this. Many of the ancient structures still visited and studied worldwide today have one thing in common–construction mass. Whether the product used was stone, concrete or brick, the design and construction of the structure had substantial mass to withstand the erosion of time and remain habitable for centuries.

In addition to surviving the ages, ancient structures and pre-mechanical temperature control buildings used masonry construction as “thermal mass” to control interior living temperatures. Even today, most residential and smaller commercial buildings in Italy, for example, do not have air conditioning. Instead, they combine the use of brick and other masonry products, with shading, orientation of windows and shutters to keep their structures temperate.

As architects and contractors now look for ways to reduce energy consumption and construct long-lasting, low maintenance structures, brick should be considered an essential building material. Thanks to features such as thermal mass, durability and flexibility, brick can play a major role in achieving society’s current sustainability goals.

Passive Solar Energy Systems and Thermal Mass

Passive solar energy systems do not require mechanical equipment to create temperate interior living conditions. Instead, the systems use the exterior surface of a building façade to regulate the temperature indoors.

Masonry buildings absorb the heat of the sun into the mass of its walls during the day. This helps to stabilize the interior temperature whether it is hot or cold outside. At night, the stored heat radiates to the interior and exterior of the building, once again helping to maintain a stable thermal environment within. While clay brick is a feasible option in many locations, hot and humid environments are more complex requiring greater consideration of all design strategies.

This reduction in the reliance on mechanical heating and cooling systems saves energy throughout the life of the building. Tests conducted by the Oak Ridge National Laboratories of this benefit have shown energy savings as high as 13%.

Durability

Clay brick can last hundreds or even thousands of years. Other than stone there is no other construction product that lasts as long as brick. This construction durability adds value to any property when considering life cycle costs. Masonry durability reduces both the monetary and environmental costs of maintenance as fewer new resources are needed to repair the structure over long periods of time. In addition, the durability of homes and buildings built with brick add a generational sense of community to towns, cities, village and neighborhoods all over the world.

Flexibility and Ease of Use

Brick can be used to achieve sustainability goals in every type of building from single family homes, hi-rise condominiums and office buildings to public institutions. Within a location, it can be used as an interior wall, floor, ceiling, fireplace profile and as a passive solar energy collector. Additionally, bricks are used across the world in every economic region. The abundance of clay, the natural, predominant material in brick, contributes to its universal manufacturing and application.

Humans have always used–and still use–clay brick’s thermal mass capabilities as an asset to construct long-lasting livable, attractive structures and can be used to effectively achieve today’s sustainability goals, creating a stronger environment for tomorrow.
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