The cost of this coverage is determined by many rating factors. The quality of the coverage, however, is determined by the quality of the insurer and whether the policy is written on a named perils or all-risk basis. A named-perils policy covers only those losses specifically cited in the contract. The all-risk policy works the opposite way — unless a peril is specifically excluded, coverage is provided. The all-risk policy is broader and the burden of proof is on the carrier, not you, in the event of a loss.