Casement Windows
Handcrafted in Britain since 2012
Timber Casement Windows for London Homes
Casement windows are the second most common window type in London period properties after sash windows, and are found across a huge variety of property styles and ages. Unlike sash windows, which slide vertically, casement windows are hinged and open either inwards or outwards, with the sash hung on butt or friction hinges.
Many original casement windows in London properties are now well over 100 years old. Frames have moved, timber has deteriorated, and single glazing offers little in the way of insulation or acoustic performance. Where repair is no longer practical or economical, replacing your casement windows with new, handmade timber versions will restore the appearance of your property whilst introducing modern double glazing, draught sealing and high-security locking.
Casement Windows in London Period Properties
As you move through London’s neighbourhoods, the casement windows you see reflect the period and character of the housing stock around them. The small, side-hung openers in the WC or bathroom of a Victorian terrace are very different in proportion and detail to the large, square bay window at the front of an Edwardian property, or the leaded light casements in a 1930s semi-detached in Bromley or Eltham.
Getting the design right matters. A casement window that doesn’t match the period, proportion or detail of a property detracts from its character and, in conservation areas, may not receive planning permission. We have been manufacturing and installing casement windows in London period properties for more than two decades, and we understand what works architecturally in each area and each period of construction.
We do not carry out works in listed buildings, but for properties in conservation areas we have extensive experience in preparing and submitting planning applications, and can manage the entire process on your behalf.
How Casement Windows Open
Casement windows can be configured in several different ways depending on the size of the opening and the requirements of the homeowner:
- Side-hung casements open from one or both sides of the frame, on butt or friction hinges. Friction hinges allow the sash to be held open at any angle, which is particularly useful in smaller rooms or where the window opens close to a walkway
- Top-hung casements are hinged at the top and open outwards from the bottom, providing ventilation whilst limiting the ingress of rain. These are commonly used in bathroom or WC windows where privacy and ventilation are both required
- Fixed lights are non-opening panes that sit alongside opening casements, increasing the glass area and therefore the light into a room without adding additional opening sashes
In Britain, casement windows are almost universally made to open outwards, which differs from France where inward-opening windows are standard, and Germany where windows are traditionally internally glazed. Manufacturing our windows in the UK means we focus entirely on windows designed for British properties and British conditions.
What We Manufacture
Every casement window we produce is handmade at one of our three UK workshops from Scandinavian kiln-dried redwood, by skilled bench joiners and machinists with decades of experience making windows for London period properties. Each window is fully painted to top coat in our workshops before installation.
- Our replacement casement windows are fitted as standard with:
- Deventer weatherseals, providing effective draught and weather exclusion
- Kenrick multipoint locking mechanisms, locking the sash into the frame in multiple positions
- Toughened double glazed units as standard, with options for acoustic, laminated or vacuum insulated glass
- Ovolo mouldings to frames and sashes, replicating the traditional profiles found in period London properties
We can manufacture casement windows in any size and configuration, with options including leaded glazing bars, stained or textured glass, and a full range of ironmongery in more than 10 finishes.
What Does Casement Window Replacement Cost?
The cost of replacing casement windows depends on the number of windows, the size of each opening, the configuration of opening and fixed lights, and the glazing specification. Design complexity has a significant impact on price — a simple side-hung casement with plain glazing will cost considerably less than a large bay window with leaded glazing bars and a custom ironmongery specification.
As a rough guide, casement window replacement typically starts from around £1,200 per window for a standard specification, rising to £4,000 or more for larger or more complex windows. Large bay windows or combination windows can be more expensive. These prices include survey, manufacture, painting, and installation.
For a precise quotation, we carry out a free survey at your property where our surveyor will measure each opening, discuss your design preferences, and advise on the most appropriate specification.
Frequently Asked Questions
One of the most important considerations in these designs is the longevity of the products. We understand that replacing your windows is a costly endeavour and our customers would not want to be replacing the same window every 10 years. We also take traditional designs & styles into account when manufacturing windows & doors, trying
to ensure replacement windows are as sympathetic to traditional styles as possible. Some parts of your new windows may not be the same as your original. This is because we need to combine all of these considerations to ensure we provide the highest quality window, which is exactly what we do.
All the sash windows and other windows and doors that we supply are fully compliant with Document L Building Regulations. New sash windows, casement windows or doors that fit into existing frames are not required to comply with regulations as such work does not affect the structure of a building. Listed buildings and conservation area properties may be exempt from regulations – your local planning authority will be able to advise you if you are unsure.
That depends on your budget. It can be cheaper to repair your windows, but replacement is the better, long-term solution. We can undertake a site survey to determine which option is best for you.
We are members of and certified by FENSA, which allows us to self-certify our installations as compliant with building regulations.
As standard, our casement windows are fitted with Kenrick multipoint locking mechanisms.