How to Fix a Timber Sash Window

Sash windows are a common element of historic homes, but with time, wear and tear can lead them to break or become challenging to operate. Fortunately, a timber sash window may be fixed and brought back to its former splendour with a little bit of knowledge. This article will examine some of the typical problems that arise with wooden sash windows and provide advice on how to fix them.

Identifying the Damage

It’s crucial to determine the degree of the damage before starting any repairs. This will enable you to decide what needs fixing and the necessary equipment and resources. Among the many problems with timber sash windows are:

Damaged cords or chains: With time, the cords or chains that open and close the sash may get frayed or snap, making the window challenging to operate.

Sashes that stick: The frames may be bent or the sash cords may be excessively tight if the sashes are challenging to open or close.

Rotting frames: Timber frames are susceptible to rot over time, particularly if they haven’t been kept up with or have been exposed to dampness.

The putty holding the glass panes in place could have deteriorated, causing them to become loose or rattle.

Fixing shattered chains or cords

The sash’s opening and closing mechanisms must be repaired or replaced if they are torn or broken. You must first remove the dividing bead and the sash from the frame in order to accomplish this (the strip of wood that runs down the middle of the frame). After that, take off the old chains or cords and fasten the new ones using the same technique. Rehang the sash after replacing the dividing bead.

How to Repair Sticky Sashes

There are a couple fixes you can do if the sashes are challenging to open or close. Make sure the sash cords are not too tight first. If they are, you can move the knot holding the lead in place and remove the staff bead, which is the strip of wood that goes along the top of the frame. Alternately, you might need to plane down the problematic area if the frame has been twisted to produce a smoother surface, of the frame. Finally, if the sashes are still difficult to move, you can use a silicone-based lubricant.

Restoration of Rotten Frames

To stop the rot from spreading further, it’s critical to take early action if the timber structure is showing signs of deterioration. Before removing as much of the rotten wood as you can, start by removing any loose or flaking paint from the affected region. After removing the damaged wood, you can use an epoxy filler to fix the hole and then sand it flat. The repaired portion should then be primed and painted to match the window frame as a whole.
How to Repair Loose Glazing

Your sash window’s glass panes may be loose or rattling if the putty keeping them in place has degraded. Using a scraper or chisel, start by removing any loose or cracked putty, being careful not to scratch the glass. Next, use a putty knife to apply a fresh bead of putty all the way around the glass’s edge. The putty should then be primed and painted to match the remainder of the window frame.


Repairing a timber sash window necessitates some fundamental DIY abilities and supplies, but with a little perseverance and focus, you can bring your window back to life and you can try use our service for timber sash windows renovation. Prior to doing any repairs, don’t forget to evaluate the damage. Also, exercise caution when using power tools and glass.

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