How to Repair Timber Windows
Timber windows can be a stunning feature of a house. They are susceptible to deterioration over time, especially when exposed to harsh weather conditions.
Instead of replacing the window frames, it's better to make repairs. This will save you money and the home will keep its original look.
Repairing rotten wood
Window frames made of wood are always exposed to the elements and are often one of the first components of a house to exhibit signs of damage and damp. Luckily, the majority of instances of decayed timber are repairable and can be treated quickly. It is crucial to recognize the problem and act as soon as possible. Otherwise, it could worsen.
Initially, it's essential to assess the extent of the rot and decide whether or not it's repairable. Begin by conducting a thorough inspection of the exterior and examining the roof for damaged slates, tiles, blocked rain gutters, and a deficient damp-proof course (DPC). It is also an excellent idea to look at the inside of the house including basements and cellars, and joist ends in non-cavity walls.
When you've identified the affected area the rot, it is essential to remove the rotten wood as quickly as you can. This will lessen the damage and make the repairs simpler. The next step is to employ a clawed hammer or pry bar to take out as much wood that is rotting as is. This can be a bit difficult, but by inserting the clawed end of the pry bar into the corner and rubbing it against the healthy board you will be able to create enough force to break the old timber free.
When removing the rotten timber, ensure that you leave an open space between the two. This will stop moisture from entering and causing further damage to the timbers in the gap. It's also recommended to remove any nails or other debris from the area to minimise the risk of leaks in the future and damage.
After taking out as much of the rotten timber as you can, the remaining boards can be repaired using epoxy or wood filler. This is a simple and affordable method of fixing wood rot in timber windows, and can be easily sanded and then painted to match the existing frame.
If the rot is extensive, it may be cheaper to replace the whole window frame, especially if you want an ongoing fix to stop further water infiltration. You may also want to speak with a professional wood window repair service to determine the options available to you.
Splicing or scarfing in
Timber windows are a classic choice for period homes and listed homes, however they can also be used to improve new properties. While they're more expensive, they offer long-term benefits and add value.
They are extremely durable and can be made to any size. They are also extremely easy to retrofit with insulated glass units (IGUs) and they offer outstanding thermal performance. They require periodic maintenance, including painting.

Softwoods and hardwoods are the two major categories of wood. Hardwoods are broad-leafed deciduous trees with an intricate cellular structure. This gives them good stability in terms of dimensions. Softwoods are made from coniferous trees or needle-leaf tree and their cellular structure is simpler.
Traditional timber frame structural joints were created by mortice and Tenons or comb joints. These joints are pinched or nailed in place and are not joined with adhesive. Water can easily get between the timber sections and cause rot, or staining. Poor workmanship could be an important factor. Fixtures that aren't correctly inserted or are not covered can allow moisture enter the frame. If this is allowed to occur, it can result in water deposits and rust staining on the window frames.
It is not recommended to replace existing timber sash window with uPVC especially in listed or historic buildings. This compromises the integrity of the structure. Furthermore, uPVC windows have a short life expectancy and eventually end up in landfill.
Modern timbers, like Accoya or Red Grandis are impregnated with a specific treatment that makes them resistant to weather conditions and pests. They can last a lifetime if they are maintained and painted properly. They can also be fitted with burglar proof glass which increases the force required to open the windows and makes them harder to break.
While replacing timber sash windows using uPVC may be cheaper initially, this is not a viable option for older or listed buildings, since it could damage the property's integrity and be in breach of planning permission. Additionally, uPVC can be very noisy and has a limited life span before they begin to wear out and require replacement.
Filling cracks and splinters
If you take care of your timber windows, they can last for many years. They can improve a building's appearance, add decoration, and fulfill their primary purpose of keeping a home safe, dry and warm. As with all things, they could be susceptible to wear and tear, when this occurs it is crucial to treat them and get repaired.
Wood rot is the most common problem that can affect windows made of wood, and it's not just an issue of replacing rotten parts. Once frames are damaged by rot, it could be a difficult repair. It is for this reason that it is essential to perform regular inspections of your timber windows, especially before winter. They are susceptible to being damaged by freezing temperatures and pounding rain.
It's crucial to know the condition of frames as well as any areas that are severely damaged when windows are taken apart. This will save you time and money since the process of restoration will be much easier. It can also reduce the cost of replacing a complete window.
If you're looking to replace a damaged piece of a wooden window It is always recommended to splice or wrap in a new piece seasoned wood rather than trying to repair the damaged one. This can be done either by cutting out the damage to at least 5cm beyond the point of rot, or by removing the entire sash and then splicing it into an entirely new piece of wood.
The final step is to treat the wood with the help of a preservative. This will stop moisture from entering the wood which can cause it rot and weaken its structure. It is crucial to paint your windows regularly in the event that you don't intend to treat them.
In most instances, windows made of timber that require repairs can be fixed by the handy DIYer. If upvc window repair are broken or the internal linings have been damaged, it may be necessary for the window to be taken apart and rebuilt. A broken counterbalance cable on a double-hung window is one of the more difficult problems to fix, since it can only be repaired by taking the sashes off the frame and disassembling it.
Painting
A fresh coat of paint will make a huge difference to your windows made of wood. It can make windows appear fresh and new. But it can also keep them healthy by covering any rot or other issues. Before you start painting, though, make sure the wood is dry. Moisture can cause decay that is wet. If you're not sure, try a wood moisture meter for testing the moisture content of the timber. Even when the wood appears dry and feels dry, moisture could be present. It is crucial to know how to tell whether your window frames are suffering from wet decay.
It is a good idea to wipe the entire frame with a damp soft cloth prior to painting. This will eliminate any grease or oils marks. This will prevent the spread of dirt and make cleaning easier. It is also worth removing the handles on your windows if you have them, and placing them on one side. This will make it much easier to work on the frames without fear of breaking the glass.
Apply a thin layer of primer using a clean, dry brush once you are ready. This will give the surface a bit more depth and will prepare it for the top coat of paint. Dry it, and then sand gently using fine sandpaper to give it a smooth finish.
The first coat of paint is now applied. Again, make sure you apply the paint in a thin layer and evenly over all areas. Once the paint has dried, sand it again gently and then apply the next coat.
Repeat this process until your window is the desired colour and finish. Be aware that you could need to repaint timber windows about every 6-10 years, according to their location and the amount of sun they are exposed to. Regular maintenance is the best method to ensure that your windows made of timber look and function to their best for as long as you can.