Join architect Steve Baczek on Build Show as he delves into one of his favorite air-sealing details—achieving airtightness at the mud sill. Learn why this crucial step can drastically improve a building's performance, with proven results of sub-0.4 air changes per hour. Steve shares his expert approach using a double-bead sealant and sill sealer "sandwich," addressing the challenges of dissimilar materials, irregular concrete surfaces, and modern airtightness standards. Packed with insights and practical tips, this episode is a must-watch for anyone striving for high-performance, energy-efficient homes.Join architect Steve Baczek on *Build Show* as he delves into one of his favorite air-sealing details—achieving airtightness at the mud sill. Learn why this crucial step can drastically improve a building's performance, with proven results of sub-0.4 air changes per hour. Steve shares his expert approach using a double-bead sealant and sill sealer "sandwich," addressing the challenges of dissimilar materials, irregular concrete surfaces, and modern airtightness standards. Packed with insights and practical tips, this episode is a must-watch for anyone striving for high-performance, energy-efficient homes.