A lintel is a reinforced beam that is used above doors and windows to support the brickwork above. It prevents the weight of the structure from resting directly on the door or window.

Also known as: Concrete Lintel, Stone Lintel, Catnic Lintel, Steel Plate Lintel.

Low E (low emissivity) glass is insulated and coated to help reduce energy loss through windows and doors.

Also known as: High level U value Glass, Planitherm Glass, Diamante Glass.

A Mortice Lock is a high-security lock fitted inside a door. It is often used on entrance doors for enhanced safety.

Also known as: 3 Hook Lock, 7 Point Lock, Locking System.

A mullion is a vertical bar that divides windows or doors into separate sections.

Also known as: False Mullion, Dummy Mullion.

A multipoint locking system secures the door and frame together at multiple points for added security.

Also known as: High Security Locks, 8 Point Locking, Shoot Bolt, ESPAG Locking.

A night vent is a type of ventilation grill that allows airflow while keeping windows and doors secure.

Also known as: Trickle Vents, Ventilation Grills, Air Flow Vents, Grills.

A one way screw is a self-tapping screw designed to be driven in one direction only, preventing tampering.

Also known as: Self Tapping Screw.

A pane refers to a single unit or panel of glass in a window or door.

Also known as: Panel of Glass, Unit, Glass Panel, Half Panel.

A patio door is a sliding glass door that typically opens onto a patio or garden area.

Also known as: Sliding Door, 2 Pane Patio, 3 Pane Patio, Internal Sliding Door.

A plant on bay is a floor-to-ceiling bay window you can walk into.

Also known as: Walk-In Bay, Walk-In Bow, Flat Roof Bay, Tiled Roof Bay.

A profile is a length of plastic used to manufacture window or door frames.

Also known as: Extrusion, Lengths, PVCU Lengths.

PVCu stands for Polyvinyl Chloride Un-Plasticised, commonly used in window and door frames.

Also known as: uPVC, Plastic Windows.

Reinforcement refers to materials added to windows and doors to strengthen them.

Also known as: Steel Reinforcement, Aluminium Reinforcement, Box Section, Hollow Section, T-Section.

Rendering is the process of covering the exterior brickwork of a house.

Also known as: Pebble Dash, Fine Rough or Smooth Render.

A residential door is the main entrance door to a home or property.

Also known as: Front Door, Main Door, Entrance Door, Outer Door.

A reveal is the interior wall area directly beside a window or door frame.

Also known as: Window Ledge, Window Sill, Window Frame, Door Way, Window Cheeks.

A restrictor device limits how far a window can open, improving safety.

Also known as: Child Restrictor Locks, Fire Escape, Easy Clean.

A sash is a style of window that features sliding panes, typically moving up and down.

Also known as: Vertical Sliders, Top Light, Fan Light.

Sealant is used to seal gaps between the window or door and the wall to prevent water or air ingress.

Also known as: Rubber Seal, Silicone, Stelmax, Putty.

Secondary double glazing involves fitting an extra internal glass frame to existing windows.

Also known as: Internal Glazing, Glazing Kits.

A shootbolt is a locking mechanism used in windows to increase security.

Also known as: Finger Bolts, Hook Locks.

Side lights are panels, often glazed, located beside a door.

Also known as: Side Panels, Glass Panels.

A sill or cill is the external ledge at the bottom of a window.

Also known as: 150mm Cill, 180mm Cill, Window Ledge, External Cill.

A snib is a latch that allows a door lock to be held open.

Also known as: On the Latch.

A soffit is the underside of the roof overhang on the exterior of a house.

Also known as: Eaves Board, Hollow Board, Roof Eaves Boarding, Fascias.

A spindle is the internal mechanism inside a window or door handle.

Also known as: Split Spindle, Thumb Lock.

Surveying involves inspecting and measuring a site in detail to prepare for installation.

Also known as: Measuring Up, Site Survey, Site Measure.

Tempered glass is toughened safety glass that shatters into blunt pieces rather than sharp shards.

Also known as: Shatterproof Glass, Safety Glass, Treated Glass.

A thermal break is a gap or material (often a gas) in insulated glass units that helps prevent heat transfer.

Also known as: Spacer Bars, Reinforced Thermal Bars, Thermal Bars.

A thumbturn is a locking mechanism for doors and windows operated by turning a knob rather than using a key.

Also known as: Spindle Lock, Lock and Key Device.

A transom is a horizontal bar dividing a window or door into sections.

Also known as: False Transom, Dummy Transom.

A tilt and turn window opens inwards and can tilt from the top for ventilation or swing in for cleaning.

Also known as: Swivel Window, Tilt Windows, Inwards Opening Windows, Push Out Window.

Toeing and heeling is a fitting technique used to properly support and align doors during installation.

Also known as: Packing Glass, Fitting Packers.

Toughened glass is glass that has undergone a heat-treatment process for added strength and safety.

Also known as: Safety Glass, 6mm Glass, Pilkington Glass.

A vertical sliding window features two glass panes that slide vertically within the frame.

Also known as: Sash Windows, Tilt and Turn, Top Light, Fan Light.

Window boards are internal sills located at the bottom of a window on the inside of a room.

Also known as: Duraboard, Softwood Boards, Window Cills, Window Ledges.

A wood grain finish is a foil-wrapped surface that gives PVCu or aluminium windows and doors a wood-like appearance.

Also known as: Oak Windows and Doors, Mahogany Windows and Doors, Wood Grain Windows, Wood Effect Windows, Rosewood Windows, Stain Grain Windows.

Double glazing is a window system that uses two panes of glass separated by a sealed gap filled with air or gas (usually argon) to improve insulation and energy efficiency in your home.

Double glazing helps reduce heat loss, lowers energy bills, improves home security, reduces noise from outside, and minimises condensation on windows.

Triple glazing offers an additional layer of insulation and noise reduction, but it can be more expensive and may not be necessary for every property. Double glazing is usually sufficient for most UK homes.

Modern double glazing typically lasts between 20–30 years depending on the quality of installation and materials used. Signs of failure include condensation between the panes, draughts, or difficulty opening and closing.

Yes. Energy-efficient double glazing can help reduce heat loss, meaning you use less energy to heat your home — potentially saving hundreds of pounds a year on energy bills.

Most window replacements in the UK fall under permitted development rights and do not require planning permission. However, homes in conservation areas or listed buildings may require consent.

Window Energy Ratings indicate how energy efficient a window is, ranging from A++ (most efficient) to E (least efficient). Look for A-rated or higher when replacing windows.

A FENSA certificate is proof that your window installation complies with building regulations and was carried out by a registered installer. It’s also essential when selling your home.

Yes. Our double-glazed windows come with a full guarantee covering materials and workmanship — including the sealed units and hardware. Specific terms will be outlined in your quote and contract.

Yes. If your window frames are still in good condition, we can often replace just the glass unit to improve insulation or fix a failed unit, which is more cost-effective.

Installation time depends on the number of windows and access, but a typical property can take 1–3 days for full replacement. We’ll confirm timings during your survey.

uPVC windows are low maintenance, thermally efficient, and cost-effective. Aluminium windows are stronger, slimmer, and ideal for modern or large glazed areas.

Condensation on the inside of your windows often means high humidity indoors, while condensation between panes indicates the unit has failed and may need replacing.

Yes. We offer a wide range of colours, styles, handles, and finishes — including woodgrain effects — to match the character of your home.