Sash windows of the highest quality

From large country estates to chic town houses, sash windows offer a timeless elegance that can capture a sense of heritage for any property. Formed of two sliding glazed frames, referred to as ‘sashes’ together in an outer frame, one of the most recognisable features of the sash window is its striking visual design.

As a specialist manufacturer of box sash windows for 45 years our range is designed to provide the perfect blend of looks, functionality and energy efficiency for fine homes, from conservation projects to new build.

Our sash window range consists of both bespoke options to suit the needs of different properties:

  • PAS24 sash windows – enhanced security and thermal efficiency for new properties

  • Traditional sash windows - classic design combined with energy efficient 24mm glazing for character properties

  • Spring Balance windows –the elegance of  sash windows with modern day operation

  • Conservation sash windows – featuring 14mm slimline double glazing for conservation projects

  • Heritage sash windows - authentic single glazed windows for listed properties
Ham Sash Windows MG_0730

PAS24 Sash Windows 

Tested to the latest PAS24:2016 security standard and available in sizes up to a massive 1400 x 2200mm, our PAS24 Sash Windows provide Part Q compliance for new builds and offer higher levels of protection for all types of property. The reinforced construction features anti-rattle meeting stiles and security fasteners, sash stops and top rail chimney blocks, they provide a secure solution for many character homes.  

The toughened 24mm thick soft argon gas filled double glazing units have a centre pane U-value of only 1.2 and are fitted with face-applied glazing bars and durable weather seals for energy efficiency.

Triple Sash Window Haverstock

Conservation Sash Windows 

Our Conservation range is designed for properties in conservation areas where the original character of the property must be retained, or for other character properties were a traditional look is desired. 

Conservation windows feature our 14mm slimline glazing units, giving the appearance of single glazing but with much improved energy efficiency. 

We offer this range in two options:

Conservation : With face-applied glazing bars

Conservation + : With true solid glazing bars

Victorian Sash Windows London

Heritage Sash Windows

Sash windows from our Heritage range are hand crafted to closely replicate original designs found in listed buildings and properties in conservation areas, allowing for authentic replacement. Manufactured with quality timber using slim timber frames and sash sections, the sashes are operated using traditional weights and cords.

Mouldings and glazing bars are tailored to closely match original period designs from the property’s historical era, whether that be Georgian, Victorian, Edwardian or Queen Anne. Sashes feature single glazing with true solid glazing bars, internal lambs’ tongue mouldings  and an external putty bead for an authentic appearance.

Discover Heritage Windows

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Spring Balance Windows 

Our spring balance sash windows offer a modern alternative to the weight-based system and are most suited to properties free of conservation constraints but where a traditional appearance is required. Spring-loaded mechanisms are situated each side of the sashes instead of cords and weights. The main benefit of the spring balance is a smaller rebate in the brickwork, as boxes are not required and therefore the window can allow in more light.

All windows are glazed, supplied with ironmongery of your choice and primed or fully paint finished. Sashes include parting beads, draught excluders and energy efficient glazing with a pane U value as low as 1.2


Sash Window Range Summary


Sash Window Summary Table

Sash Ironmongery

Box sash windows are fitted with a choice of sash lifts, sash fasteners to lock the sashes in place and for added security lockable sash stops; and when weights are used sash pulleys.

There are many styles and finishes available when it comes to sash window furniture, many of which are shown on our website. Where a heritage finish is required options such as mottled antique brass, antique black and polished brass are available.

View Sash Ironmongery

Sash Lock to Window

High Quality Standards

Our box sash windows recently passed stringent weather performance standards and are now certified to European and British standards EN14351-1 and BS6375-1, giving customers reassurance they can rely on them all year-round.

Sash Windows are covered by a robust 10-year warranty that covers the frame, sash, glazing and ironmongery. All windows are CE marked and conform to British Standards. Salisbury Joinery holds the Silver CMS mark which ensures quality standards, all windows are CE marked and conform to British Standards.


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