Under the insurance section of the JCT contract, there is a requirement for insurance to be arranged in “joint names”. Insurance for the works and existing structure must be arranged in the joint names of the homeowner* and the contractor.
The safest way to undertake a contract is with an appropriate JCT Contract and JCT compliant insurance.
Standard home insurance is not compatible with JCT Contracts. (under a JCT contract the homeowner is referred to as the Employer).