Choosing a specialist for traditional sash windows is different from selecting a supplier for standard modern replacement windows. Experience with historic timber joinery can make a substantial difference.
Look for relevant repair experience
Ask about sash cords, weights, pulley systems, spliced timber repairs, putty glazing and accurate reproduction of mouldings. A contractor should explain which original parts can be retained.
Compare the proposed scope
Obtain itemised descriptions of repairs, draught proofing, glazing, painting and making-good. Ask what happens if hidden decay is discovered once work begins.
Check conservation knowledge
For protected properties, look for familiarity with Scottish listed-building and conservation-area requirements. A contractor should not guarantee that permission is unnecessary without checking the circumstances.
Request evidence and references
Photographs of comparable work, references, appropriate insurance and written warranties can help. Choose based on quality and suitability, not just the lowest quotation.
A related local service
For readers seeking commercial assistance in the Stirling area, The Sash & Case Window Company provides sash and case window services. This is a related business reference; compare providers independently before commissioning work.