Synthetic roofing underlayment is a critical layer of roof protection designed to control moisture intrusion, improve durability, and support code-compliant roofing systems. Ark Synthetics (Ark Guard LLC) offers high-performance roofing underlayment solutions engineered for residential construction, certified for CCMC and CCRR by Intertek. It helps seal your home against water damage and other moisture infiltration, which can cause mold growth and rotting deck boards