Glossary – R

Reflective Foil Insulation (RFI):
Aluminium coated Fabric with fibreglass or building paper cone

A sloping member in a roof providing the principle structural support for the roofing material

Rods, Bars or prefabricated mesh, usually of steel, embedded in concrete for the purpose of resisting particular stresses and strengthening the concrete element

Reinforced concrete:
Concrete which has been strengthened by the inclusion of steal reinforcing mesh, bars or rods

Retaining Wall:
Structural wall element usually designed by a Civil Engineer to hold back soil

The upper enclosing element of a building or area which gives protection to the covered space from the external environment

Roof Batten:
A light timber member fixed to the tops of rafters or trusses to which the roofing materials may be fastened or secured