Abstract: A rainwater harvesting roof for a water storage tank has a roof of relatively water-impermeable material substantially covering the tank. The roof has a central support supporting the roof, forming a peak, and the roof further has a substantially circumferential band of relatively water-permeable material located in the roof near the outer edge of the roof. The rainwater harvesting roof preferably also has a circumferential gutter of relatively water impermeable material depending downward from the interior surface of the roof and located beneath the substantially circumferential band of relatively water-permeable material. The circumferential gutter further has slits allowing the passage of water therethrough.