Occupied renovation is two occupancies at once. Residents are living in a building that also contains open walls, temporary power, dust, noise and trades with access. The construction risk and the care risk overlap physically and neither policy was written assuming the other.
Life safety during construction is a regulatory obligation. Sprinkler and fire alarm systems taken out of service, corridors used as staging, exits obstructed, and temporary construction barriers all engage life safety requirements and interim fire safety measures. A failure there is a survey finding as well as an insurance problem.
Infection control during construction is a genuine clinical exposure. Dust from demolition in a building housing frail residents raises respiratory and fungal infection risk, and the interim controls are a documented clinical requirement rather than a courtesy.
A resident injured because of construction is not a builders risk claim. It is a liability claim, and whether it lands on your general liability, the contractor policy, or both depends on the contract and the additional insured wording.
Fill-up assumptions drive the financing. On a new senior housing project the lender underwrote a lease-up curve, so a delayed opening is a debt service problem, which is what delay in completion coverage exists to address.
Existing structure versus new work. On an addition, the boundary between the builders risk and the permanent property policy has to be drawn deliberately or a loss at the seam produces two carriers pointing at each other.