The finest timber sash windows in London & the Home Counties – handmade in London

At Timbawood we specialise in the sensitive replacement and repair of traditional sash windows for period properties, including windows for Victorian, Edwardian and Georgian homes. Our range of timber sash windows can be designed to complement any property type, from modern to period, to Listed or Conservation.

As well as full replacement sash windows, we also offer single or double glazed sashes fitted to the existing frames, as well as sash window refurbishment, to preserve as much of the original architecture as possible.


By offering a wide range of the finest timbers, glazing and hardware, your new timber windows will provide you with the highest thermal, acoustic and security benefits. Some of the key features and benefits you can expect from our period sash windows include:

  • Choice of the finest stable timbers including Accoya, Sapele and Oak
  • Specialist glazing options including acoustic glass, laminated security glass and slimline double glazing that looks just like single glazing
  • Choice of profiles, horns and mouldings to match your existing windows
  • High quality hardware – High security fasteners, locks and restrictors 
  • Full factory spray finish with high performance microporous paint
  • Full perimeter draught proofing
  • Full design, manufacture and installation service
  • Handmade to your specification in our West London workshop

We can also reglaze or replace sash windows with our thermally efficient single glazing, ‘Solo‘, which is 38% more effective at thermal insulation than single glazing.  

If you’re looking to restore your sash windows to their original design and quality, please get in touch on
020 8893 4889
to arrange a free survey, quotation, or to visit our London workshop to see the quality of our windows being made for yourself. We work throughout London, Surrey, Middlesex and the South East.


sash windows london

Sash Windows London

As specialists in period, conservation and listed properties, our traditional sash windows in London have been approved for listed and conservation properties by planning officers and architects throughout London and the South East.

We offer three proven ranges of high-end specification wooden sash windows and bespoke timber doors:

  • Conservation Range – for properties in conservation areas and homes of distinction
  • Traditional Range – for period and modern properties
  • Heritage Range – exact-match heritage windows for listed buildings and stringent conservation areas

Please get in touch to speak to one of our specialists about our full range of bespoke sash windows.

Areas we cover include:

Battersea, Balham, Barnes, Belgravia, Chelsea, Chiswick, Clapham, Ealing, Fulham, Hammersmith, Ham, Hampton, Isleworth, Islington, Kensington, Kingston, Knightsbridge, Marylebone, Mayfair, New Malden, Notting Hill, Pimlico, Putney, Richmond, Shepherds Bush, Surbiton, Teddington, Twickenham, Wandsworth, Westminster, Wimbledon and many more.


What are sash windows?

Sash windows are vertically opening windows generally associated with traditional architecture and design.

How do sash windows work?

A sash window consists of two framed window sashes – one positioned in front of the other. This is also known as a ‘sliding sash window.’ These windows units sit in frames with vertical grooves that allow them to move up and down smoothly, without any chance of the frames bashing into each other, which would cause damage.

This vertical movement is enabled through the use of counterbalances. These are essentially weights on cords and pulleys. Traditional sliding sash windows do not have hinges and require no outward swing.

What materials are sash windows made of?

You’ll find sash windows built from all typical window frame materials, including unplasticised polyvinyl chloride (uPVC), aluminium, composite, and, in Timbawood’s case, timber. Timber windows are some of the most durable around; as long as you inspect and maintain them at regular intervals, they can easily last a lifetime.

Timber is the most sustainable and the greenest choice of any window material. Although plastic can occasionally be recycled it is normally downcycled or thrown in landfills instead. Unlike wood, plastic is also non-biodegradable.

Finally, Timber is a naturally insulating material. This means that timber windows and doors provide better thermal efficiency than their plastic equivalents, helping protect you from cold winters.

How do you draught-proof sash windows?

Draught seals provide insulation for sash windows by sealing the gap between a window and its frame, thereby increasing the insulation properties of the window, and reducing energy costs.

By choosing to draught-proof sash windows using compression seals you can improve thermal insulation as well as noise insulation, increasing the thermal efficiency of your windows and allowing for a quieter home environment.

New sash windows should incorporate draught proofing. At Timbawood we specialise in bespoke timber windows and doors for period, conservation, and listed properties, including sash windows. All our sash windows, even those for older, listed building and period properties, are draught-proofed with either compression seals or brush seals for optimal efficiency.

Can you double-glaze sash windows?

We’d recommend double glazed sash windows over single glazed windows for most buildings, unless a building is listed and planning authorities would like the original single glazing to be retained. If your sash windows are single glazed, then you’ll be losing up to 20% of your home’s heat through them.

With double glazing, the gap between the two panes of glass is filled with gas types which are poor conductors of heat, therefore reducing heat loss and improving insulation. Modern double-glazing units include a ‘Low E’ (low emissivity) coating, which reflects heat into the building and offers far better thermal insulation.

At Timbawood, we use particularly dense, inert gases in our double glazing, such as Krypton, which have been shown to conduct the least amount of heat. This means we can offer slimmer glazing units to give a more traditional, elegant look, which can be as thin as 11mm and look just like single glazing, but with all the extra insulation benefits.

Call us for our latest offers:

0208 893 4889

To arrange a free survey or quotation, please get in touch:

logo_0000_timbawood-logo  logo_0002_lpoc_logo_new logo_0004_fensalologo_0005_conformite_europeenne_logo-svglogo_0006_background-copy   logo_0001_trustmark-logo-no-text