Glossary R

Rabbet-

A rectangular cut where two surfaces are cut on the edge of a member parallel with the grain. On a door jamb the rabbets would form a built-in stop on the face of the jamb.

Raised Moulding-

A moulding not on the same level or plane as the wood member or assembly to which it is applied; as contrasted to "flush moulding."

Rake Moulding-

A moulding applied to the rake or the exposed inclined ends of a gable roof; term is sometimes applied to any moulding installed in a direction other than horizontal or vertical; also barge moulding.

Random Lengths-

Unspecified lengths as contrasted to "specified lengths."

Replacement Window-

A double-hung window that can be bought as a kit, including all needed hardware, that will replace a broken or old window, usually without disturbing the internal or external walls.

Resaw-

In a moulding plant, a bandsaw which saws ripped lumber lengthwise into ideal shapes for conversion into mouldings with minimum wood waste.

Return-

Continuation in a different direction of a moulding or projection, usually at right angles.

Reveal-

That portion of the moulding and or jamb that is exposed when two members are joined, such as when casing is applied against the jamb.

Ripsaw-

Lumber that has not been dressed or surfaced but which has been sawed, edged and trimmed at least to the extent of showing saw marks in the wood.

Rough Opening-

The opening in a wall where a window is to be installed.

Round Edge-

The corners of a piece shaped to a radius; generally implies a greater radius than for an "eased edge"; shaped primarily for appearance.

R-value-

Refers to the resistance a window has to thermal transfer or heat flow.