A-Rated Windows
Windows awarded an A rating under the UK Window Energy Rating system. They offer strong thermal efficiency and help reduce energy loss from a home.
Acoustic Glazing
Specialised glazing designed to reduce noise entering a property. It often uses thicker panes or laminated glass.
Air Tightness
A measure of how effectively a window or door prevents drafts and uncontrolled airflow.
Aluminium Cladding
An external aluminium layer added to frames to improve durability while maintaining a slim, modern appearance.
Argon Gas
An inert gas used in sealed glazing units to improve insulation by limiting heat transfer.
Bargeboards
Protective boards fitted to the gable end of a roof to shield rafters and enhance appearance.
Bifold Doors
Door systems made from multiple glazed panels that fold and slide to create a wide opening.
Bow Window
A curved window arrangement that extends outward from the wall, usually formed of four or more panels.
Bay Window
A window projecting outward in a square or angular form, creating internal floor space and increased light.
Casement Window
A window hinged at the side that opens outwards, commonly used across UK homes.
Cavity Wall
A wall structure with two layers separated by a gap. Modern windows must be installed to suit cavity wall detailing.
Colour Fastness
A measure of how well coloured uPVC or composite materials resist fading from sunlight.
Composite Door
A robust door made from multiple materials, including GRP and a solid core, offering strength and energy efficiency.
Condensation
Moisture that forms when warm air meets a cold surface. Modern glazing reduces internal condensation.
Conservatory Roof Replacement
Upgrading an existing conservatory roof with a more thermally efficient system.
Curtain Walling
Large, glazed wall systems found in commercial buildings, occasionally used in modern homes.
Double Glazing
Two panes of glass separated by a sealed gap filled with an insulating gas like Argon to help reduce heat loss.
Drainage Slots
Small channels built into window frames to allow water to drain safely outside.
Energy Efficiency Rating
A score given to windows and doors reflecting their thermal performance.
Face-Fixed Installation
A fitting method where frames are secured directly onto the external face of a wall.
Fascias
Boards fixed to the edge of a roof to support guttering and protect structural timbers.
French Doors
A pair of glazed doors that open outward or inward to provide external access.
Fully Reinforced uPVC Frame
A uPVC frame strengthened internally with steel or aluminium for added rigidity.
Gasket Seal
A flexible barrier that prevents water and air infiltration around glazing and frames.
Guttering
Channels attached to the roofline to collect rainwater and direct it to downpipes.
Heat Retention
The ability of a window or door to keep warmth inside a property.
Heritage Window
A window designed to replicate traditional features while meeting modern performance standards.
Insulating Glass Unit (IGU)
A sealed double or triple glazed unit that improves thermal and acoustic performance.
Internal Beading
A security feature where glazing beads are located inside the property to prevent external glass removal.
Jamb
The vertical side of a window or door frame.
Load-Bearing Mullion
A vertical structural support between window units capable of carrying weight.
Multi-Chamber Frame
A uPVC profile containing several internal chambers to enhance insulation and rigidity.
Multi-Point Locking System
A locking mechanism that secures the door or window at several points along the frame.
Mullion
A vertical bar that separates and supports multiple window sections.
Patio Doors
Large glazed doors such as sliding, French or bifold doors that provide access to outdoor spaces.
Reinforced Frame
A frame strengthened with metal inserts for added security and stability.
Replacement Windows
New windows installed to replace existing units to improve energy efficiency, security and appearance.
Roofline Products
Items such as fascias, soffits, guttering and bargeboards that protect the roof edge.
Sash Window
A traditional sliding window style found in period properties.
Safety Restrictor
A device used to limit how far a window can open for child safety.
Security Hardware
Components such as locks, hinges and reinforcement designed to increase protection against break-ins.
Self-Cleaning Glass
Glass with a special coating that helps break down dirt and encourages rainwater to wash it away.
Sightlines
The visible frame and glass proportions seen from outside or inside a window.
Soffits
Boards fitted beneath the roof overhang to cover rafters and provide ventilation.
Solar Gain
Heat energy from the sun that passes through glazing.
Spacer Bar
The component separating panes within a double or triple glazed unit.
Stormproof Window
A window designed to resist severe weather, often featuring overlapping sashes for extra protection.
Thermal Break
A barrier within a frame that reduces heat transfer, commonly found in aluminium systems.
Thermal Efficiency
The measure of how effectively a product retains heat.
Tilt and Turn Window
A dual-function window that tilts inward for ventilation and turns inward for full opening.
Transom
A horizontal bar dividing sections of a window or door.
Trickle Vent
A small adjustable opening that allows controlled ventilation without opening the window fully.
Triple Glazing
Three panes of glass separated by insulating layers for high performance.
Toughened Glass
Safety glass that has been heat-treated to increase its strength and improve safety on breakage.
U-Value
A measure of heat loss through a building component. Lower values indicate better insulation.
uPVC
A rigid, durable and low-maintenance material commonly used for frames and roofline products.
Ventilation
The controlled movement of air into and out of a building to maintain indoor air quality.
Weatherproofing
Measures used to prevent wind, rain and moisture entering around windows, doors and roofline components.
