Practical answers about traditional timber sash and case windows, repairs and improvements. Every property is different; an assessment establishes the appropriate work.
What is the difference between sash windows and sash and case windows?
Sash and case is the traditional Scottish name for a sliding sash window. The sash is the glazed moving frame; the case is the fixed outer surround. Read our guide to window sashes and sash and case window guide, or compare sash and casement windows.
How much do sash window repairs and refurbishment cost?
As a budgeting guide, sash window repair and refurbishment work may cost around £300–£600 plus VAT per window (£360–£720 including VAT at 20%).
This is an indication only, not a fixed price or quotation. The cost depends on the condition and size of the window, access and the repairs required. Costs can vary considerably and may fall outside this range, particularly where extensive timber repairs, glazing, decoration or specialist access are needed. A written quotation confirms the recommended work, what is included and the price following assessment. This range does not apply to supplying and fitting new replacement windows.
How much does a new timber sash window cost?
A new replacement window is a different scope from repair or refurbishment. Dimensions, timber, glazing, pane pattern, finishing and installation access affect the price. We provide a project-specific quotation following a survey. See our replacement cost guide.
Do I need permission to repair or replace sash windows?
Requirements depend on the property, its designation and the proposed work. A repair, a glazing alteration and complete replacement can raise different questions. For a listed building or a property in a conservation area, check the proposal with the relevant local planning authority before commissioning changes. See our conservation window guide and Historic Environment Scotland property advice.
Can existing single-glazed sash windows be upgraded?
Sometimes. Options include draught proofing, secondary glazing and suitable replacement glazing or sashes. Timber condition, glazing rebate dimensions, added weight, original glass and any consent requirements need assessment. Compare draught proofing, secondary glazing and double glazing.
Are wooden sash windows worth retaining?
Sound original timber windows can often be repaired component by component. Retaining them can preserve the proportions, historic glass and character of a traditional property. Maintenance and future repair costs still matter; replacement may be appropriate where deterioration is extensive. Read repair or replace?.
What is a Simplex or easy-clean fitting?
Some traditional windows have special fittings that allow the lower sash to be brought inward for cleaning. The arrangement and condition must be checked before use. Do not unhook cords or release a heavy sash without understanding its support system; ask a specialist to demonstrate safe operation.
How often do timber sash windows need maintenance?
Inspect paint, putty, timber joints, cords and perimeter seals regularly and attend to defects before water causes further decay. Recoating intervals depend on the coating system, exposure and condition. Follow the coating and hardware manufacturers’ maintenance instructions. Use our annual maintenance checklist.
Can old sash windows be made more secure?
Suitable fasteners, keyed locks and stops may improve security where the timber and fixings are sound. Fittings must suit the window and its use, including any escape requirements. A generic restrictor should not be treated as a certified child-safety device. See security and ironmongery.
How can I tell whether a sash window needs repair or replacement?
Sticking, broken cords, peeling paint and isolated decay do not automatically require a new window. A survey checks the sash, case, sill, joints and operating mechanism to establish what can be retained. Send photographs and describe the symptoms; avoid forcing the sash or cutting into historic timber.
Will draught proofing or new glazing reduce heating bills?
Reducing unwanted air leakage and improving glazing can improve comfort, but the effect on bills depends on the whole building, heating, ventilation, installation and use. A glass-only test figure is not a guarantee of whole-window or household savings. We discuss the appropriate options following assessment.
Are sash windows a standard size?
Traditional openings vary, and replacement joinery should be surveyed rather than assumed to be a standard size. Pane pattern, meeting rails, mouldings and frame depth also affect the specification. See made-to-measure timber sash windows.
Do you assess windows across Scotland?
We are based in Stirling and assess suitable projects across Scotland, subject to location, scope and access. See our service areas and send your property details so we can confirm the next step.