A belly board is a protective rigid or semi-rigid barrier installed underneath a mobile home to support insulation and protect the ductwork from pests and moisture. It serves as the bottom seal of the home’s envelope, ensuring that the conditioned air from your Mobile Home Furnaces stays within the living space. If the belly board is torn or sagging, it can lead to massive energy loss and allow rodents to damage the Crossover Duct system. Repairing or replacing this board is a critical step in maintaining the efficiency of any Mobile Home Complete System. It also provides a clean area for technicians to work when servicing the under-chassis plumbing or electrical lines. High-quality belly board material is durable enough to withstand the humid conditions often found in the crawl space of a manufactured home. Keeping this barrier intact is one of the most cost-effective ways to lower your monthly heating and cooling costs.