Abstract: A wildfire protection system has rotating sprinklers (1) on sprinkler legs (2) positioned temporarily or indefinitely as needed on roofs (10) with the sprinkler legs resting on opposite slopes (6) from a ridge (5) of the roof and removed for sprinkler irrigation or easily disassembled for compact storage when not in use for wildfire protection. The rotating sprinklers can wet not only roof tops but also nearby trees (13), shrubs (14) and areas for protection against flying sparks and burning particles. The rotating sprinklers are preferably a low-weight plastic type and the sprinkler legs are preferably four low-weight plastic members that intersect at a series connection for garden-hose water supply to one or more of the rotating sprinklers. The rotating sprinklers are saddled on a roof top with two of the sprinkler legs placed on each of two opposite roof slopes. Low weight of the rotating sprinklers allows them to be placed easily on roofs with access by ladder or structured to be positioned indefinitely.