INNOVATIVE, AIRTIGHT, SECURE — The Lid by Radon Home Defence provides the ultimate safeguard for your home’s indoor air quality and energy efficiency. Specifically engineered as an airtight cover for backwater valve access boxes, The Lid ensures complete air barrier continuity where it is needed most. By creating a flawless seal, it prevents dangerous radon gas from infiltrating the basement and stops costly energy loss through the foundation. Measuring 19 in. x 15 in. x 1.5 in. thick, this durable cover is designed for a precise, secure fit. The Lid is the essential, next-generation defence for maintaining a safe, healthy, and energy-efficient home environment. Airtight Radon Protection: Creates a robust, continuous seal over backwater valve access boxes to block the entry of harmful radon gas into the living space. Eliminates Energy Loss: Effectively stops drafts and heat loss through the foundation, helping to reduce utility costs and improve overall home comfort. Ensures Air Barrier Continuity: Seamlessly completes the home’s existing vapour and air barriers, meeting the highest standards of modern building safety and performance. Precision Dimensions: Measures exactly 19 in. L x 15 in. W x 1.5 in. Only 0.5" above ground for a perfect, low-profile fit over the access box. Durable Construction: Built tough to withstand demanding basement environments while maintaining a consistent, long-lasting seal over time. Specialized Design: Purpose-built exclusively for backwater valve access boxes, eliminating the guesswork of retrofitting generic covers.
