October 26, 2017

R – T

R – T



Horizontal sash member.

The serviceability wind pressure in Pascals that when applied to the window will give the deflection and water penetration requirements of AS2047.

(See Glazing Rebate)

Adding or replacing items on existing buildings. Typical retrofit products are replacement doors and windows, insulation, storm windows, caulking, weather stripping, vents, landscaping.

The visible part of each side of a window opening not covered by the frame, or the recess between the frame and the face of the wall.

Reveal Fin
An extension on the external surface of the window frame where a timber (or other) reveal can be fixed to cover the wall recess.

Right Hand
Describing a component or design. It is always taken viewing the window from the outside.

Rough Opening
The opening in a wall into which a door or window is to be installed.


Safety Glass
Glass constructed, treated or combined with other materials in order to reduce the likelihood of injuries If broken by human impact, etc. and meets relevant safety standards. Safety glass comprises toughened, laminated and wired glass.

Inner frame which holds glass in operable and fixed window units.

Sash Lift
A protruding handle screwed to the inside bottom rail of the lower sash on a double-hung window. In taller windows they may be fitted to the top rail of the lower sash for ease of use.

Accomplishment of weather-tight protection between glazing or framing materials, usually by combinations of gaskets and sealant.

Elastomeric material with adhesive qualities applied between components of a similar or dissimilar nature to provide an effective barrier against the passage of the elements.

Sealed Unit
(See Insulating Glass Unit)

Side Rail
The vertical bar in a sash.

Sight Size
The actual size of the opening that admits day light.

Silicone Sealant
Sealant having a backbone of alternating silicon-oxygen atoms as its chemical composition.

Horizontal member at the bottom of a window frame or door.

Sill Flap
A vinyl seal fitted to the underside of the window to take up variations due to building settlement.

Single Glazing
Single thickness of glass in a window or door.

Site Glaze
Window glazed after installation of window into building.

Solar Heat Gain Coefficient (SHGC)
The total solar heat gain divided by exterior solar lrradiance. It is composed of the solar direct transmittance plus the inward-flowing fraction of absorbed solar energy that is re-radiated, conducted or convected into the space.

Spacer Frame
Component of an Insulating Glass Unit (IGU) which maintains the width of space between the panes of the unit (See also Air Gap).

Small blocks of neoprene, EPDM, silicone or other suitable material, placed on each side of the glass product to provide glass centering, maintain uniform width of sealant bead and prevent excessive sealant distortion.

Standard Window
A window which is manufactured to a standard design and sizes.

Any bar which is added to stiffen the framework.

Stile (Sash)
A vertical side member of a sash.

The molding on the inside of a window frame against which the window sash closes; in the case of a double-hung window, the sash slides against the stop. Also called bead, side stop, window stop and parting stop.

Storm Mould
A section which is added externally to seal the frame against the building. Usually has an integral flashing fin.

Structural Members
The elements, including mullions, transoms, meeting rails, and meeting stiles, that perform the function of transferring loads to the perimeter frame.

Structural Silicone Glazing
Use of a silicone sealant for the structural transfer of loads from the glass to its perimeter support system and retention of the glass in the opening.

Stud Opening
Opening size between timber studs in a building. It applies to vertical and horizontal openings.

Sub Sill
An under sill section that is used to raise the height of the sill to suit a specific building-ln requirement. This is not necessarily a sump drainage sill.

Sump Sill
An undersill section applied to a window allowing it to gain sill depth for improve water performance. Standard sill drains out through this sump sill.


Tempered Glass
(See Toughened Glass)

Test Report
A report issued by a test laboratory detailing the tests that a window has undergone.

Thermal Break
An element of low conductance placed between elements of higher conductance to reduce the flow of heat. Often used in aluminium windows.

The member that lies at the bottom of a sliding glass door or swinging door.

Timber Reveal
The timber surround that is factory fitted to aluminium windows.

Tinted Glass
Glass with colorants (pigments) added to the basic glass batch that gives the glass colour, as well as light and heat-absorbing capabilities. The colour extends throughout the thickness of the glass.

Toned Glass
Alternative name for Tinted Glass.

Toughened Glass
Flat or bent glass that has been heat treated and quickly air- quenched to create compression in the outer surface and tension in the interior. If broken, it fractures into many small pieces. Toughened glass is approximately four to five times stronger than annealed glass of the same thickness when exposed to uniform static pressure loads and is classified as a safety glass.

A horizontal intermediate framing member of a window assembly.