Fire insurance is a contract where the insurer agrees to compensate for any loss or damage caused by fire during the policy period. It is typically for one year and must be renewed. Premiums can be paid in a lump sum or installments. For a claim, there must be an actual fire-related loss and the fire must be accidental. Key principles of fire insurance include the insured having an insurable interest, utmost good faith between parties, it being a contract of indemnity, and compensation only being paid if fire is the proximate cause of loss or damage.