The building envelope is a collective term for roof, wall, window, and below-grade systems - all "six sides" of the building. Everyone knows that leaks and other building envelope problems can be a big headache. That’s why GRLA’s building envelope consulting services focus on controlling the movement of water, air, heat, and water vapor across this envelope while improving performance and reducing risk. To learn more about our building envelope consulting and design services please visit the Building Envelope Consulting/Design services page.