It means that the insurance company is not guaranteeing you the replacement of your home if it burns down. For example, your insurance policy limit is $200,000, but the cost of replacing your home is $210,000, if you had a replacement policy, the insurance would pay for the replacement of your home despite the fact that your insurance limit is only $200,000. However, the insured value at the time of the loss is usually required to be at least 80% of the replacement cost before your policy is covered on a replacement cost basis.