A roof jack apparatus that includes a rail having first and second end portions and a slide connector slidably received by the rail and capable of being fixed at a position along the rail. The slide connector is configured to releasably receive a jack support for at least partially supporting the rail above a roof. The roof jack apparatus also includes a fascia rest disposed on the second end portion of the rail for resting against a fascia of the roof. The slide connector can move along the rail with respect to the fascia rest. A plank support disposed on the second end portion of the rail can receive and support at least one plank.