rag

Hard coarse rubble stone eg Kentish Ragstone.

ramp-and-twist

A stone curved in two dimensions.

random rubble wall

Rubble wall laid uncoursed.

rebate

Continuous sinking.

reconstructed/reconstituted stone

Cast stone.

reeded

Surface consisting of small convex ridges.

relieving

An arch in a solid wall to divert some of the load away from the lintel below.

reredos

A wall or screen behind an altar.

respond

half-pier bonded to a wall, carrying one end of an arch.

reticulated

Network of bands worked into the stoneface to a gauge and the face 'picked'

with a fine mallet-headed point.

return

Visible surface at a change of direction.

returned end

Termination of stone worked to form external angle.

reveal

Return at each side of an opening.

rib

A projecting band on a ceiling or vault, seperating the webs of a groined wall.

ribbon pointing

Pointing following the shape of rubble units and finished slightly proud of

the surface. Not regarded as good practice.

riser

Vertical surface of a step.

riven

Surface produced by splitting a stone along the cleavage planes.

roll moulding

Moulding of more than semi-circular section.

Roman cement

Natural cement produced from 1796 by firing a calcareous clay stucco in the 19th century.

No longer available.

rose window

A circular window with foils or patterned tracery.

rosette

A rose-shaped patera.

rotunda

A room circular in plan and usually domed.

rubbed

Smooth finish obtained by rubbing stone with abrasive.

rubble

Walling stone of irregular shape and size.

rubble wall

Wall built with stones of irregular shape and size.

rusticated

Stone having a sunk, dressed margin to provide recessed joints.