How We Repair Rotten Timber in Sash Windows

Rotten timber is one of the most common problems we see when restoring traditional sash windows. Many homeowners assume that once rot appears the only solution is to replace the window entirely. In reality, this is rarely necessary.

At Brown’s Sash Windows Restorations, we specialise in restoring original timber windows wherever possible. One of the key systems we use when repairing damaged timber is Repair Care, a professional wood repair system designed for durable restoration work.

Using the right materials and techniques allows us to rebuild damaged sections of timber while preserving the original window.

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Why Timber Sash Windows Develop Rot

Rot normally develops when moisture enters exposed timber over a long period of time. This can happen when paint begins to fail, small cracks appear in the wood, or water is allowed to sit on the window.

Common areas where rot appears include:

• window sills

• lower sections of sash frames

• glazing bars

• joints and corners

Catching these issues early makes repairs much easier and helps prevent more extensive damage.

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How Brown’s Repairs Rotten Timber

When repairing sash windows, the first step is always to remove any decayed timber completely. Once the damaged wood has been cut away, we stabilise the remaining timber before rebuilding the damaged area.

At Brown’s we use the Repair Care system, which is designed specifically for repairing decayed timber in windows, doors and other joinery. The system uses flexible epoxy repair compounds that bond strongly to the existing timber and allow long-lasting repairs to be made.

The typical repair process includes:

1. Removing all rotten timber

2. Treating the remaining wood with a stabilising primer

3. Rebuilding the damaged section with Repair Care repair compounds

4. Sanding and shaping the repair to match the original profile

5. Priming and painting to protect the timber

Once cured, the repair can be sanded, painted and finished just like normal timber.

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Why We Use Repair Care

There are many timber fillers available, but the reason we use Repair Care is because it provides durable, flexible repairs designed for joinery restoration.

Unlike some traditional fillers, the epoxy repair compounds remain slightly flexible once cured. This allows them to move with the natural expansion and contraction of timber, helping the repair last longer.

Another advantage is that many Repair Care products can be sanded and painted on the same day, allowing restoration work to progress efficiently.

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Preserving Original Windows

One of the most important reasons we carry out timber repairs rather than replacement is to preserve the original character of period properties.

Many homes across Retford, Nottinghamshire and the surrounding areas still retain their original sash windows. These windows were built from high-quality timber and, with the right restoration work, they can often continue performing well for many years.

Repairing the timber helps extend the life of the window while maintaining the authentic appearance of the property.

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Sash Window Specialists in Nottinghamshire

At Brown’s Sash Windows Restorations, we work with homeowners across Retford, Nottinghamshire and the surrounding areas, restoring and repairing traditional timber sash windows.

From timber repairs and draught proofing to full sash window restoration, our aim is always to preserve original windows while improving their performance.