If you have noticed that your window no longer sits square in its frame and appears to have dropped on one side, you are certainly not alone. This is one of the most common issues homeowners experience with double glazed windows, particularly in properties across Dorset, Bournemouth, Poole and Christchurch. While it can look alarming, the good news is that in many cases the problem can be resolved without needing a full window replacement.
Understanding why a window drops on one side helps you spot early warning signs, avoid further damage, and take timely action through professional glazing repairs.
A dropped window occurs when the opening sash no longer aligns correctly with the frame. You may notice uneven gaps, difficulty opening or closing the window, draughts, or the handle catching when you try to lock it. In more advanced cases, the window may scrape along the frame or refuse to shut properly at all.
This issue is particularly common in uPVC windows, which rely on precise alignment between the hinges, frame and glass sealed units to function smoothly. When one element falls out of balance, the entire window can sag.
Windows rarely drop overnight. There are usually subtle signs that appear long before the problem becomes obvious.
You might notice the window feels stiff when opening, the handle becomes harder to turn, or the window no longer seals tightly at the corners. Small draughts, increased noise from outside, or condensation forming inside the glass sealed units can also indicate underlying issues.
If you live in Bournemouth or elsewhere along the Dorset coast, salty air and changing weather conditions can accelerate wear on window components, making early detection particularly important.
Window hinges carry the full weight of the opening sash. Over years of daily use, hinges can weaken, bend, or loosen. When this happens, the sash begins to sag, usually towards the handle side.
This is one of the most frequent reasons homeowners require window repair rather than full window replacement.
If the glass sealed units inside the window were not positioned correctly during installation, the weight of the glass may not be evenly distributed. This places unnecessary strain on one side of the frame.
Professional glazing repairs often involve correcting this imbalance through a process known as heel and toe windows.
Heel and toe windows is a vital glazing technique that ensures the glass supports the window correctly. It involves placing packers at precise points inside the frame so the weight of the glass transfers diagonally to the hinges rather than pulling the window downward.
Without proper heel and toe methods, windows are far more likely to drop over time.
The same principle applies to doors, where a toe and heel door adjustment prevents sagging and alignment issues.
If glass replacement has been carried out in the past using thicker or heavier glass, the window may now be carrying more weight than it was originally designed to support. Without hinge upgrades or correct packing, this extra weight can cause gradual sagging.
If the frame is in good condition and the issue relates to hinges, alignment or glazing position, professional window repair is usually the most cost effective option. This may involve hinge replacement, realignment, or re glazing using correct heel and toe methods.
For many properties across Dorset, this approach restores full functionality and extends the life of the window significantly.
Replacement is generally only necessary if the frame itself is damaged, warped, or no longer structurally sound. Even then, a professional assessment is essential before making that decision.
Reputable double glazing repairs specialists will always recommend repair where possible rather than pushing unnecessary replacements.
Proper glazing repairs are not simply about fitting glass into a frame. The positioning of glass sealed units is critical to the long term performance of the window.
Heel and toe windows techniques ensure that the weight of the glass supports the structure rather than working against it. When done correctly, this prevents sagging, improves security, and ensures smooth operation for years to come.
The same careful attention is required for doors, where toe and heel door adjustments prevent misalignment and locking issues.
Minor adjustments are sometimes possible, but without the correct tools and knowledge of glazing techniques, it is easy to make the problem worse. Professional assessment is strongly recommended.
While not immediately dangerous, a dropped window can compromise security, insulation and weatherproofing. Left untreated, it may lead to more extensive damage.
Most window repair jobs can be completed within a single visit, depending on the cause and whether parts are required.
A window that has dropped on one side is a common issue, but it is rarely a reason for alarm. With the right expertise, most cases can be resolved quickly and effectively through professional window repair and glazing repairs.
If you live in Dorset, Bournemouth, Poole or Christchurch and have noticed signs of window misalignment, RPS Double Glazing Repairs can provide expert advice, thorough inspections and reliable solutions.
Contact RPS Double Glazing Repairs today for a professional assessment and a free quote, and restore your windows to their proper working condition with confidence.