T leased ground floor and basement in Tribeca. The lease was "AS IS". The T is responsible for all repairs to it's alterations. T is responsible for and repairs due to water damage from T use of space. LL is responsible for structural and nonstructural repairs to building caused by any causualty. T installed seamless waterproof floor in basement and ground floor. The basement floor is coming up after 2-3 years of use. T is trying to blame the damage to LL because the basement raw floor was leaking and the floor is lifting. LL says the floor in basement was dirt and no vapor barrier was used in the installation. The installation was faulty. LL's insurance adjuster said the damage was caused by the installation no vapor barrier used. Tenant remains in the space but paying no rent.