A membrane applying apparatus comprises a wheeled frame adapted to ride on a surface to be covered with the membrane. The rear end of the wheeled frame is generally configured to support a roll of membrane. The apparatus also comprises a roller support frame pivotally mounted to the wheeled frame at the rear end thereof. The roller support frame pivotally supports an idler roller and a pressing roller for respectively guiding and pressing the membrane as the membrane is unrolled during its application. The roller support frame is pivotable between an operative position in which the idler roller and pressing roller respectively guides and presses the membrane, and an inoperative position. In the inoperative position, the roller support frame is pivoted substantially upwardly, thereby providing access to the rear end of the wheeled frame to allow the installation or removal of the roll of membrane.