Décoder les zones climatiques : planifier une construction résiliente

Alors que la durabilité continue de régner en tant que facteur d’achat clé pour les acheteurs de maison, nous constatons des signes que la « résilience » est la tendance pour 2022. La construction résiliente consiste à construire intentionnellement dans une perspective de durabilité et de solidité. Essentiellement, une maison résiliente bien construite est bâtie pour résister aux catastrophes naturelles et causées par l’homme. En fait, l’Urban Land Institute définit la construction de la résilience comme « la capacité de se préparer et de planifier, d’absorber, de se remettre et de s’adapter avec plus de succès aux événements adverses ».

Resilient Building for Location

While it's daunting to prepare for every natural disaster Mother Nature throws at you, one way builders are planning resilient construction is by examining climate zone maps and considering best practices for resilient building for location. Climate zones are one way builders can predict the types of weather they'll need their structures to resist.

Every three years, the International Code Council (ICC) updates several codes, including the International Energy Conservation Code (IECC). The IECC climate zone map was developed to provide a simplified, consistent approach to defining climate for implementation of various codes.

In 2003, with direction from the Building America teams, researchers at the Department of Energy's National Renewable Energy Laboratory simplified the U.S. IECC map into eight climate zones. They are defined by the number of heating degree days, average temperatures and precipitation: 

• Hot-humid

• Mixed-humid

• Hot-dry

• Mixed-dry

• Cold

• Very-cold

• Subarctic

• Marine

In the latest December 2020 release, about 10 percent of all U.S. counties shifted to a warmer climate zone. These counties represent some highly populated, metropolitan areas that are experiencing considerable construction activity.

Building for Climate Zones with Better Energy Efficiency

Builders rely on climate zones to know what energy codes and standards to follow. However, as resiliency comes to mind, homes should strive to meet the challenges of the climate where they are built. To do this, it's a good idea to make sure you're using the newest climate zone map.

"Resiliency will always mean different things to different people because nature's threats are geographically specific," says Craig Miles, Director of OSB Sales & Marketing at LP Building Solutions. "Phoenix has high heat, whereas Texas has high heat and strong winds. Florida and the Carolinas have moisture-rich humidity and salt. The Plains and Midwest have storms and straight-line winds, while the North has below-freezing temperatures."

Using the climate zone map to determine building materials helps achieve a certain measure of confidence. "Building materials that are resilient may give you a more predictable series of outcomes as well as the ability to withstand weather and other external threats," says Miles.

For example, to guard against the hot, beating sun, LP® TechShield® Radiant Barrier may help your air conditioning be more effective and may also help lower your energy costs to a more predictable level, especially in climate zones 1–4. For climate zones that experience moist and humid conditions, LP Legacy® Premium Sub-Flooring guards against moisture threats––even hard rain before the roof goes up––while adding floor strength.

The climate zone map dictates many of the energy-efficiency measures buildings must use and are especially relevant to the building envelope. 

For more about resilient construction no matter where you live, read “How to make your builds more weather-resistant.” 

Learn how to stay up-to-date on building regulations or take a deep dive into green building codes today.