Rafter - A roof beam sloping from the ridge to the wall. In most houses, rafters are visible from the attic. In styles such as a craftsman bungalows and some "rustic" contemporaries, they are exposed.
Raking Cornice - The sloping moldings of a pediment.
Return - A wooden member nailed between the rafter-end and the stringer for bed board support.
Rib Band - A board set into the inside face of the stud to support a second floor joist.
Ridge - The top- most portion of a roof from which roof sides fall away.
Ridge board - A decorative board standing on edge, along the ridge of a roof.
Ridgepole - The horizontal beam at the ridge of a roof, to which rafters are attached.
Ridge Rafter - The wooden member supporting rafter-ends at the ridge of a roof.
Rise - The vertical distance from one stair tread to the next.
Riser - The vertical portion of a step. The board covering the open space between stair treads.
Roof Pitch - Degree of roof slant stated in inches rise per foot.
Roof Run - The horizontal distance from the outside of a bearing wall plate to the center of the ridge rafter.
Roof Span - Equal to twice the roof run, or the horizontal distance between the outside faces of bearing wall plates.
Roof Types - Style and shape of roofs - gable, gambrel, hip, mansard, shed, flat, butterfly, salt-box.
Rough Opening - The frame wall opening to receive a door or window unit.
Rough Sill - The bottom rail of a window rough opening.
Rubble - Masonry construction using stones of irregular shape and size.
Rusticated Stone - Stonework, sometimes roughly finished, distinguished by having the joints deeply sunk