Building envelope system products promote sustainable buildings
DuPont building envelope systems are designed to help meet the growing demand for more sustainable buildings. The company continues to create products and processes that pass rigorous criteria for use in buildings designed to use less energy, water and materials.
Products such as Tyvek weather barriers and other DuPont building envelope systems products apply field tested material science to help in the sustainable design of commercial and residential buildings.
Energy consumed during building operation – from lighting to heating and cooling — accounts for the major share of energy consumption over the life of a building. Helping to create an air-and water-tight building envelope contributes to energy efficiency in three important ways:
Making Ventilation More Effective
HVAC represents the largest share of energy use for all building types, as much as 37 p34d3n5 of total energy use. DuPont building envelope systems can reduce air leakage through the wall assembly, to help air conditioning and heating systems work more efficiently.
At wind speeds as low as five miles per hour, cavity batt insulation without a Tyvek air barrier retains less than 40 percent of its original installed R-values. DuPont building envelope systems can control unwanted air flow to help make insulation maintain its installed R-value.
Protecting Against Moisture
Wet insulation retains less than 40 percent of its effective R-value. DuPont building envelope systems help protect against bulk water intrusion and allow water vapor to escape, to help keep insulation dry.
Efficient HVAC operation and IEQ (indoor environmental quality) are core features in sustainable buildings. DuPont systems help reduce the envelope loads and improve the HVAC efficiency by protecting against air and water infiltration. By reducing air infiltration, DuPont can help maintain comfortable temperatures and IEQ. By preventing bulk water intrusion into the walls, they also help reduce the risk of mold and mildew, and maintain IEQ.
For residential construction, weather barriers can help keep external contaminants from entering a building, which can help meet garage separation recommendations from green rating systems.
Keeping out bulk water and allowing moisture vapor to escape can help extend the life of the walls by inhibiting water damage, corrosion and mold. Dry walls can help extend the life of a structure by reducing the risk of water damage or corrosion to structural materials. This can mean fewer materials are needed for repair and replacement, over the life of the building.
Topics: HVAC - Heating, Cooling, and Ventilation, Indoor Air Quality (IAQ), Insulation, Sustainable Trends and Statistics, Technology, Thermal Envelope - Building Envelope, Urban Planning and Design, Ventilation, Wall Systems / Curtain Walls, Water and Moisture Management - Waterproofing, Weatherization