Sash Window Restoration in Cambridge

Assessing the window before work begins

We inspect the accessible frame, sashes, sill and joints for failed coatings, open gaps and soft timber. We also look at how the window currently opens and closes. Water often collects around vulnerable junctions, so painting over a damaged sill without understanding its condition is unlikely to give a lasting result.

The assessment establishes the scope of the work and any access requirements. We discuss which faces of the window are included, how rooms will be protected and whether the work needs staging. On older painted surfaces, preparation must take account of the possibility of lead paint; the method needs to be appropriate rather than simply sanding everything indiscriminately.

Timber repairs that suit the damage

Localised deterioration can sometimes be removed and repaired with a suitable resin system. The remaining timber must be sound enough to support that repair. We shape repaired areas to follow the original section and prepare the surface for its coating, rather than leaving a flat patch across a moulded detail.

Where decay is extensive, or a joint is no longer secure, replacement timber may be more appropriate. We flag these areas and explain when joinery work is needed. A decorative repair should not disguise a weakness that will continue to admit water or affect the stability of the window.

Preparation, priming and painting

Loose paint is removed with care, sound edges are feathered where appropriate, and surfaces are cleaned before coating. We avoid building unnecessary paint thickness around meeting rails and sliding edges. Original profiles deserve attention too: careful preparation helps keep the lines of the joinery visible.

Bare timber and repaired areas receive a suitable primer as part of the chosen paint system. We allow the required drying time between stages and select the finish for the exposure and existing surface. Colour and sheen are agreed before painting, including any difference between the inside and outside faces.

Weather matters throughout the work. Rain, cold surfaces and strong heat can all interfere with application or drying. We plan around suitable conditions and explain any delay, rather than coating a window simply to keep to a date.

Sticking sashes and operation checks

A sash may stick because of accumulated paint, timber movement or a mechanical fault. Painted-shut sashes need careful assessment before any attempt to release them; forcing the frame can damage timber or glass. We discuss what appears to be causing the problem and the limits of the decorating work.

We check and flag visible cord and pulley issues, rather than assuming paint will improve the operation. Cord replacement is not included in our decorating scope. Where movement can be checked safely, we take care that fresh coatings do not bridge moving sections and explain when the finish is ready for normal use.