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As the colder months approach, your windows become one of your home’s most important defences against wind, rain and falling temperatures.
Well-maintained windows help keep warmth inside, prevent draughts and protect your home from the elements. But when windows begin to show signs of wear, winter weather can quickly turn a minor issue into a more expensive problem.
Fortunately, many common window problems can be spotted before temperatures drop. From failed sealed units and worn seals to damaged hinges and ageing frames, acting early could save you from unnecessary discomfort, and potentially more costly repairs later.
So, what should you look out for?
At a Glance: 8 Signs Your Windows Need Attention
| Warning sign | What it could mean | Repair or replace? |
| Draughts | Worn seals, poor alignment or frame movement | Often repairable |
| Condensation between panes | Failed double-glazed sealed unit | Sealed unit can often be replaced |
| Difficult to open or close | Hinge, lock or alignment problems | Usually repairable |
| Cracked or worn seals | Ageing or damaged weather seals | Usually repairable |
| Rising heating bills | Poor thermal performance | Inspection recommended |
| Visible frame damage | Rot, warping, corrosion or impact damage | Depends on severity |
| Water around windows | Seal, drainage, frame or installation problem | Needs investigation |
| Increased outside noise | Worn seals or deteriorating glazing | Repair or upgrade may help |
Not sure which applies to your windows? A professional inspection can establish whether a straightforward window repair is all that’s required or whether replacement would offer better long-term value.
1. You Can Feel Draughts Around Your Windows
A noticeable draught is one of the clearest signs that a window needs attention.
Run your hand carefully around the window frame and opening sections on a cooler or windy day. If you can feel cold air coming through, the problem could be caused by:
- Worn or damaged weather seals
- Poor window alignment
- Damaged hinges
- Movement within the frame
- General wear and tear
Even a relatively small draught can make a room feel noticeably colder, particularly during winter.
It doesn’t necessarily mean you need a new window, though. Adjustments, replacement seals or new hardware may be enough to resolve the problem.
2. There’s Condensation Between the Glass
Condensation on the room-facing surface of your windows can occur when warm, humid indoor air meets cold glass.
Condensation between the panes of double glazing, however, is different.
If you notice persistent misting, cloudiness or droplets trapped inside the glass, the sealed unit may have failed. This allows moisture into the space between the panes and reduces the unit’s effectiveness.
Signs of a failed sealed unit
- Misting that cannot be wiped away
- A cloudy or hazy appearance
- Water droplets between the panes
- Reduced visibility through the glass
The good news? You may not need to replace the complete window.
Where appropriate, Sheerwater Glass can install replacement sealed units, restoring clear glazing without unnecessarily replacing the entire frame.
3. Your Windows Are Difficult to Open or Close
Windows should open, close and lock smoothly.
If yours are sticking, jamming, catching on the frame or requiring excessive force, don’t simply put up with it. There may be an underlying issue with the window’s:
- Hinges
- Locks
- Handles
- Alignment
- Frame
These problems can become worse with continued use and may eventually affect security as well as convenience.
Early intervention is particularly worthwhile because a relatively straightforward adjustment or hardware replacement may prevent further damage.
4. The Window Seals Look Damaged or Worn
Weather seals provide an important barrier against draughts, moisture and the elements.
Over time, seals can deteriorate through age, weather exposure and everyday use.
Look for seals that are:
- Cracked
- Brittle
- Flattened or compressed
- Coming away from the frame
- Missing in places
- Visibly perished
Damaged seals can reduce weather resistance and contribute to uncomfortable draughts.
Replacing worn seals before winter is a relatively simple way to help your windows perform as intended.
5. Your Heating Bills Are Rising
There are many reasons household energy costs can increase, so a higher bill doesn’t automatically mean your windows are responsible.
However, if your home is becoming harder to keep warm, particularly around windows, inefficient or ageing glazing could be contributing to heat loss.
Ask yourself:
| Question | What to look for |
| Do some rooms feel noticeably colder? | Compare rooms with older and newer windows |
| Can you feel cold spots near the glass? | Check windows on colder days |
| Are there obvious draughts? | Inspect opening sections and seals |
| Is the glazing particularly old? | Older units may offer poorer thermal performance |
| Are several window problems appearing together? | It may be worth assessing repair vs replacement |
If your existing windows are reaching the end of their useful life, modern replacement windows can offer improved thermal performance, security and reliability.
For independent guidance on improving your home’s energy efficiency, you can also visit the Energy Saving Trust.
6. There’s Visible Damage to the Frames
Take a few minutes to inspect your window frames from both inside and outside where it is safe to do so.
Watch for:
- Cracks
- Rot or decay in timber frames
- Warping
- Loose trims
- Corrosion
- Impact damage
- Gaps around the frame
A small defect may not seem urgent during mild weather, but persistent rain, wind and low temperatures can expose existing weaknesses.
The sooner damage is assessed, the better the chance of dealing with it before it develops into a larger problem.
7. You’ve Noticed Water Around the Window
Water entering around a window should always be investigated.
The window itself may be responsible, but water ingress can have several possible causes, including:
- Failed or damaged seals
- Drainage problems
- Frame deterioration
- Installation issues
- Problems with surrounding building materials
Leaving water ingress unresolved risks damage to plaster, decoration and surrounding materials.
Because the source isn’t always obvious, a professional inspection is preferable to simply applying sealant and hoping the problem disappears.
8. You Can Hear More Outside Noise Than Before
Has traffic, aircraft or general outside noise suddenly become more noticeable?
Changes in acoustic performance can sometimes indicate deteriorating seals, glazing or window components.
Double glazing can help reduce external noise, but its effectiveness depends on factors including the glass specification, seals, frames and installation.
If the increase in noise has happened alongside draughts, misted glazing or other problems, it’s another reason to have your windows checked.
Window Repair or Replacement: Which Do You Need?
Finding a problem with your windows doesn’t automatically mean replacing them.
In many cases, a professional repair can restore performance and extend the life of the existing window.
| Repair may be appropriate when… | Replacement may be worth considering when… |
| A sealed unit has failed | Windows are extensively damaged |
| Hinges need adjusting or replacing | Frames have deteriorated significantly |
| Locks or handles are faulty | Several components are failing |
| Weather seals are worn | Windows consistently perform poorly |
| The window needs realignment | Repair costs are becoming repetitive |
| The overall frame remains sound | You want to improve thermal performance, security or appearance |
Every property is different, which is why Sheerwater Glass takes a practical approach: if a window can sensibly be repaired, replacement shouldn’t be the automatic answer.
Our experienced team can assess the condition of your windows and recommend the most appropriate option.
Why Autumn Is a Good Time to Check Your Windows
Waiting until the first freezing week of winter to discover a problem isn’t ideal.
Checking your windows during autumn gives you time to identify issues while the weather is generally milder and arrange any necessary work before your windows face the harshest conditions.
Acting early can mean:
- A warmer home – deal with draughts before temperatures fall
- Better weather protection – identify vulnerable seals and frames before prolonged rain
- Fewer surprises – reduce the risk of a minor fault becoming an urgent winter repair
- More efficient heating – address areas where unnecessary heat loss may be occurring
- More time to plan – arrange repairs or replacement without waiting for a problem to become urgent
A Simple Pre-Winter Window Check
Before the colder weather arrives, spend a few minutes checking each window in your home.
- Open and close each window to check it operates smoothly.
- Make sure handles and locks work correctly.
- Check around frames for noticeable draughts.
- Look for cracked, loose or deteriorating seals.
- Check double glazing for misting between the panes.
- Look for cracks, warping, rot or corrosion on frames.
- Check surrounding walls and sills for signs of water ingress.
- Note any rooms that feel unusually cold near the windows.
If you spot anything you’re unsure about, arranging an inspection before winter can help establish whether a repair is required.
Get Your Windows Ready for Winter
Cold, wet and windy weather has a habit of exposing weaknesses in ageing windows.
A draught, misted sealed unit or stiff handle might seem like a small inconvenience today, but dealing with window problems early can help keep your home warmer, more comfortable and better protected throughout winter.
And remember: a problem doesn’t necessarily mean you need a new window.
From replacement sealed units and new seals to locks, handles, hinges and complete window replacement, Sheerwater Glass can assess what’s wrong and recommend an appropriate solution.
If you’re looking for window repairs in Surrey, arrange a window health check with Sheerwater Glass before winter arrives.
