The document discusses a roof waterproofing solution using a spray applied liquid rubber membrane. The existing roof membrane was cracked and causing water leaks into the rooms below. The liquid rubber membrane can be sprayed over the existing damaged membrane, providing a seamless and flexible waterproof layer without removal of the old surface. The liquid rubber membrane is a cost-effective solution that offers benefits like puncture resistance, bonding to most substrates, and withstanding thermal cycling and corrosion.