Window Repair

Bring back the authentic look of your windows.

Rotten Timber Repairs

Rotten Timber Repairs for Sash & Casement Windows

Timber windows are constantly exposed to the elements, and over time areas of decay can develop, particularly around cills, bottom rails, glazing bars, meeting rails and external joints. Left untreated, even minor rot can spread, leading to more extensive damage and potentially costly replacement work.

At Complete Timber Window Solutions, we specialise in repairing rotten timber rather than replacing entire windows wherever possible. Our preferred method is to carefully remove all decayed timber and splice in new sections of matching hardwood or softwood, securely bonded using high-performance polyurethane adhesives and mechanical fixings. This approach restores the structural integrity of the window while retaining as much of the original fabric and character as possible. Once repaired, the timber is shaped to match the existing profiles before being primed, filled where necessary and finished with a professional paint system.

For smaller areas of deterioration where the timber remains structurally sound, specialist epoxy resin repair systems can provide an effective solution. Resin repairs are ideal for minor defects, splits, surface decay and isolated areas of damage. They allow repairs to be completed without removing larger sections of timber and can often be more cost-effective than extensive joinery repairs.

Frame Repairs

Frames also suffer from rot and in particular cills. Here you can see that the frame and cill has extensive rotten area’s exposed.

As with the sash we cut out the effected area and splice in new timber to a near invisible join and repair.

Sash & Casement Repairs

Repairing the windows rather than replacing them will be a significant cost saving, although there are times when it’s not possible to save the window or it’s not cost effective.

When it is apparent that the window is beyond repair we can have manufactured complete new windows & frames to match with your existing windows.

Specialist Epoxy Resin

When It’s difficult to splice in new timber or the area effected is only small or an irregular shape, we use or specialist epoxy resin to carryout the repair.

The resin in these situations is an excellent substitute and is approved by historic England.

Splicing in new timber

All the repairs that we carry out we try to splice in new timber to create a strong seamless repair. We first cut out all rotten wood then treat the remaining timber with a two part chemical hardener.
This stabilises the timber and stops any further moisture ingress. We then splice in new timber and reinforce the joints with specialist epoxy resin, this once cured it’s fine filled with two part filler to form a strong and near seamless join then sanded smooth ready for painting.
New hard wood cill

The lower section of the frame that was rotten has had new timber spliced in, specialist epoxy resin has also been used to reinforce the joints.
A new parting bead with an integral draught seal part of our draught proofing system has also been fitted.
You may not need a replacement

Usually this type of problem is caused by years of weather, moisture ingress and often the lack of maintenance. People believe that damage like this can only be fixed by a total replacement, however in many cases we are able to rescue windows and repair them on site.
In some cases we will have to have certain parts manufactured such as bottom rails etc; but this we can usually get done quickly and have them match the existing profiles of the window as they do vary in style.

If you have chosen a package that includes painting then yes we would repaint the windows after the repairs have been completed
Moisture ingress, failed paint systems, blocked drainage paths, UV exposure, poor ventilation, insect attack, and lack of maintenance.
This is a very common problem, as part of our draught proofing installation or refurbishment packages we will free up your windows and return them to full working order.
This will all depend on a number of factors that we have to consider such as location, window size and accessibility, the amount of repairs required, if there are any broken glass panes, if you require draught proofing installation, or double glazing upgrades, painting etc.
It is best to speak to one of our advisers and book a survey.
Yes. Usually this can be resolved. Our draught proofing service will eliminate that problem.
We regularly work on Grade 2 listed buildings & properties in conservation areas. Like for like repairs do not require planning permission as they do not change the appearance of the building.
No, our slim double glazing units are designed to look like single glazing but have the modern day attributes.
No, we do all of our work onsite, however, if we need to have a new sash or casement window manufactured because its beyond economical repair we will remove it and cover the window opening with board to make the property secure during the manufacturing process.

Your Questions Answered

Get in touch if you have any specific questions you would like to ask. We are always happy to help

Aftercare & Maintenance

Our timber window maintenance check programme is designed to identify potential issues before they become costly problems.

Gain peace of mind knowing as a pervious & valued customer your timber windows are being monitored and cared for correctly, helping to maximise their lifespan and protect your investment.