There are few household frustrations quite as persistent as a window that refuses to close properly. Whether it sticks halfway, refuses to lock, or leaves a noticeable gap that lets in cold air, a faulty window can quickly become more than a minor inconvenience. For homeowners across Dorset and Bournemouth, this is a common issue, particularly in properties with older uPVC or double glazed windows.
Understanding why your window will not close properly is the first step towards fixing it. In many cases, the problem is repairable without the need for a full replacement. With the right diagnosis and a professional repair or upgrade, your window can often be restored to smooth, secure operation.
A window does not need to be completely jammed to indicate a fault. Early warning signs are often subtle but should not be ignored.
You may notice that the handle feels stiff or no longer lines up cleanly with the frame. The window might scrape slightly as it closes or require extra pressure to shut. In some cases, the window appears closed but will not lock fully, leaving the home less secure and more prone to draughts.
These symptoms usually point to mechanical wear or frame movement rather than serious structural damage.
One of the most common reasons a window will not close properly is hinge misalignment. Over time, the weight of the glass unit combined with regular use can cause hinges to sag slightly. This is especially common with side hung and top hung uPVC windows.
As the hinges wear, the sash no longer sits square within the frame. This can cause the window to catch on the frame, resist closing, or prevent the locking points from engaging correctly.
In many cases, hinge replacement or realignment is all that is required. This is a straightforward repair for a professional and can dramatically improve how the window operates.
If your window closes but will not lock, the issue is often with the locking mechanism rather than the window itself. Multi point locks can wear down internally over time, particularly in coastal areas like Bournemouth where salt air accelerates corrosion.
A faulty lock may feel loose, stiff, or inconsistent. Forcing it can cause further damage and may leave the window insecure.
Upgrading the lock mechanism not only restores smooth operation but also improves home security. Modern window locks are more robust and can often be fitted without replacing the entire window.
uPVC is durable, but it is not immune to movement. Temperature changes, prolonged sun exposure, and age can all cause frames to expand or warp slightly. Even a small change in shape can affect how the window closes.
This is particularly noticeable after hot summers or during colder months when materials contract. The window may appear misaligned, even if the hinges and locks are still in reasonable condition.
A professional repair specialist can assess whether the frame can be adjusted or whether targeted upgrades are needed to compensate for the movement.
Sometimes the cause is far simpler than expected. Dirt, grit, or debris trapped in the frame can prevent the window from closing fully. Damaged or displaced rubber seals can also create resistance or stop the sash from sitting correctly.
While light cleaning can help, seals that have hardened or shrunk with age usually need replacing. New seals can significantly improve insulation, reduce noise, and help the window close more smoothly.
It is tempting to attempt a quick fix, especially if the problem seems minor. Simple checks such as cleaning the frame, inspecting visible hinges, and ensuring nothing is obstructing the sash are reasonable first steps.
However, forcing a stiff window or attempting mechanical adjustments without the right tools often causes more harm than good. Misaligned hinges and worn locks require precise fitting. Incorrect repairs can damage the frame or glass, leading to higher costs later.
For safety, security, and long term performance, professional uPVC window repairs are usually the best option.
If you are struggling with a window that will not close properly, advice from an experienced professional can save time and frustration. RPS Double Glazing Repairs specialise in window repairs and upgrades across Dorset and Bournemouth, helping homeowners restore function, security, and comfort.
A quick phone call or email is often all it takes to identify the issue and arrange a practical solution.