Liniar Sales Guide

T
Thermal break - Using a material such as polyamide to separate two aluminium surfaces to enhance the
thermal performance.
Thermal dam - Another patented innovation from Liniar, the thermal dam helps to prevent heat loss from the
outer edge of the frame.
Thermal efficiency - “Using less energy to provide the same level of service” is a general definition. In our
industry that would be using less energy to keep your home at the desired comfortable heating level.
Threshold - the bottom part of a door that is stepped over. Liniar doors have a choice of threshold, inc. Part M.
Tilt & Turn window - An open-in casement window that is side-hinged, but can also tilt inwards.
Transom - A strengthening crossbar, usually horizontal, that divides window panes.
Triple glazing - Glazing units constructed from three panes of glass filled with either air or argon – considered
more thermally efficient than double glazed units.
Trickle vent - An optional built-in feature to allow ventilation, located at the top of the window frame or sash.
Usually a routed slot through section.
U
uPVC - Unplasticised polyvinyl chloride, more usually called ‘PVC’ or ‘PVCu’ in the UK and Europe, or ‘vinyl’ in the
USA.
U-Value - A measure of heat loss, expressed as W/m²K. The lower the U-value, the better the thermal efficiency.
V
Vent - An optional built in feature to allow ventilation, located at the top of the window frame or sash. Usually a
routed through section.
Vertical Slider - A style of window where the sash slides upwards. Liniar does not currently offer a VS.
W
WER - Window Energy Ratings – offering a clear way to show consumers the energy rating of a particular
product. The familiar coloured ‘rainbow’ label is similar to those on electrical appliances.
Wind loading - The force applied to a structure as a result of the impact of wind.
Window board - internal capping at bottom of window frame, to cover over cavity external brick to internal brick
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