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Installed correctly, comprehensive vented-to-unvented attic upgrades can significantly reduce utility costs while improving comfort, indoor air quality, and durability of the attic structure.

Where homes have crawl spaces, they are commonly unvented allowing excessive heat in summer, cold in winter, and humidity year-round. Converting a crawl space from vented to unvented provides an opportunity to create a temperate space for heating and cooling equipment located there to operate more efficiently while also reducing the infiltration of moisture, dust, pollen, pests, and soil gases year-round. However, critical installation best practices need to be followed to ensure a successful project. Use this checklist to get the significant energy savings, enhanced comfort, and health benefits possible from a quality installed unvented crawl space.