Timber sash windows.
A closer look.

Golden Ratio Sash Windows & Doors specialises in timber windows across London. Its published offer covers repairs, restoration, draught-proofing and replacement, with particular attention to period homes. That range is useful for homeowners who want an assessment of their existing joinery before deciding how extensive the project needs to be.

Prepare a short room-by-room list before enquiring. Note sticking sashes, rattles, visible deterioration and damaged glazing, together with any priorities for appearance or comfort. Photographs help explain the enquiry, while an on-site inspection gives the specialist a better basis for defining the work and preparing a suitable quotation.

The repair service describes work on sash cords, weights, damaged timber, glazing and hardware. Its restoration offering extends to a broader overhaul of existing windows. Having both options available makes it sensible to discuss each opening individually, especially where the condition varies across the property.

Ask the surveyor to distinguish necessary repairs from optional improvements. Request a clear account of the components being retained, repaired or renewed. A window schedule helps you compare the proposed scope and understand why one opening needs a different treatment from another. It also provides a useful reference when the work is completed.

Where replacement is appropriate, Golden Ratio describes bespoke timber windows made to suit the property. Its replacement page emphasises matching existing proportions and profiles. For a period home, these details deserve discussion alongside the glazing and finish: the appearance of a sash window depends on the relationship between its components.

Review the proposed meeting rails, glazing bars, sash horns and surrounding joinery. Ask for drawings or an agreed specification where a close match matters. Identify details you want retained before approving manufacture, and establish which parts of the surrounding opening are included in the quoted work.

The company states that it is Accoya approved and offers Accoya timber. This is a relevant option to discuss for replacement joinery. Confirm the material selected for your order and request the applicable warranty documents. Distinguish the timber warranty from separate terms covering workmanship, glazing, coatings and other components.

Also agree the colour, ironmongery and internal finish. Ask how any differences between existing and new details will be addressed. A complete specification makes approval more meaningful and reduces uncertainty about what will arrive on installation day. Keep the agreed version with your quotation and subsequent project correspondence.