Double Glazing Repairs
Expert window and door maintenance in Hampshire since 1983
Based in Andover, Hampshire, KJM Group has a full-time service engineer dedicated to assessing and repairing any problems with your existing double glazing. You don't always need to replace your windows. We can repair draughty frames, fix jammed door locks, and replace misted sealed units, saving you time and money.
Page Contents
What We Repair
Two of our sales team also have practical knowledge due to their initial fitting background. We can provide expert, no-obligation quotes for the following items:
- Replacement Sealed Units: Fixing misted up glass or heavy internal condensation.
- Hardware: New window and door handles.
- Security: New locking mechanisms (gearboxes and multipoints).
- Accessories: New letterboxes and draught excluders.
- Operation: New hinges (friction stays) for both windows and doors.
- Maintenance: General servicing and door alignment.
Quotations are free of charge and without obligation.
Visit KJM's homepage to view our full product range
The "Repair vs. Replace" Reality
If you live in Hampshire, you likely have uPVC or aluminium windows and doors. They were probably sold to you with the promise of being "maintenance-free." However, "low maintenance" does not mean "no maintenance."
Issues like coastal corrosion (common near Portsmouth/Southampton) and hard water deposits (common in Andover) can cause components to fail. But the good news? You rarely need to replace the whole window. Most issues can be fixed for a fraction of the cost of a full installation.
Typical Repair vs. Replace Costs
| Issue | Repair Solution | Est. Repair Cost | Est. Replacement Cost |
|---|---|---|---|
| Cloudy/Misted Glass | Replace glass unit only | £150 - £ Upwards | £500 - £ Upwards |
| Drafty Window | Replace hinges & gaskets | £50 - £90 | £500 - £ Upwards |
| Jamming Door Lock | Replace gearbox/mechanism | £100 - £180 | £1,050 - £2,500 |
| Stiff Handle | Replace handle & oil | £20 - £40 | N/A (Included in new) |
The Economics of Repair: Why "Local" is Logical
When looking for a company to service or repair your windows, you might be tempted to call the biggest national name, or a specialist you found online who operates 40 miles away. However, unlike a full installation—where a surveyor measures everything once and the team returns weeks later for a solid day of work—repairs are different. They are often reactive, unpredictable, and require agility.
For the most cost-effective repair, you should ideally look for a specialist within a 15–20 minute radius of your home.
🔍 The "Recon" Reality
The vast majority of window and door repairs are not "one-visit" fixes. Unless it is a simple adjustment, the engineer first needs to perform a reconnaissance (recon) visit. They need to strip down the door or window to identify the specific part causing the failure. There are thousands of variations of locking mechanisms, gearboxes, and hinges—many from manufacturers that no longer exist.
The typical repair timeline looks like this:
- Visit 1 (Diagnosis): The engineer travels to you, strips the unit, identifies the broken part, secures the property, and leaves.
- Sourcing: The exact part is ordered or sourced from a specialist supplier.
- Visit 2 (The Fix): The engineer travels back to you to install the new component.
The Andover to Portsmouth Equation
Let’s look at a practical example of why distance kills the economy of repairs. Imagine you live in Portsmouth and you call a repair specialist based in Andover. That is roughly a 50-mile, 1-hour drive (on a good day without the M27/A34 traffic chaos).
If that repair requires two visits, the math stops making sense for both the business and the homeowner:
- Visit 1: 2 hours travel (round trip) + 30 mins on site.
- Visit 2: 2 hours travel (round trip) + 1 hour on site.
- Total Time: 5.5 hours (with 4 hours of pure driving).
The Result: You are paying for a technician to sit in a van for 4 hours to do 1.5 hours of work. To make that viable, the company has to charge a heavy "call-out" premium, which often pushes the price closer to the cost of a brand new door. Conversely, a technician located 15 minutes away spends only 1 hour driving total for both visits. That saving is passed directly to you.
Supply Only Services (DIY)
We also offer a supply-only service for glass sealed units, handles, and letterboxes for those comfortable with DIY from our Andover trade counter.
How to Measure for Replacement Glass
KJM are often able to quote over the telephone for supply-only glass units. To give you an accurate price, we need just two pieces of information:
- The Size: The approximate width and height of the glass (measure the visible glass size only).
- The Height from Floor: The distance from the internal floor to the bottom edge of the glass.
Under UK Building Regulations, glazing MUST be manufactured from Toughened Safety Glass if:
- The bottom of the glass is less than 800mm from the floor level.
- The glass is adjacent to a door (within 300mm).
Areas We Cover for Repairs
To ensure we provide the most cost-effective and rapid repair service, our dedicated service engineer primarily covers a focused radius around our Hampshire showroom. Our core repair areas include:
- Andover & Surrounding Villages
- Winchester
- Basingstoke
- Salisbury
- Newbury
- Whitchurch & Overton
Frequently Asked Questions
Likely not. This is a classic sign of a "dropped" door or a gearbox that needs lubrication. A service technician can adjust the hinges to realign the door so the locking points engage smoothly without forcing the handle.
Yes. The glass unit is completely separate from the frame. If you have condensation inside the glass panes, we can remove the beading, take out the old unit, and install a new, energy-efficient argon-filled unit while keeping your existing frames intact.
Repairs often require two visits: one to diagnose and one to fit the part. Using a local specialist minimizes travel costs, making the repair economical and much faster.
There are thousands of different window and door profiles used in the UK over the last 30 years. Even "standard" locks have different backset sizes and spindle operations. Without a physical inspection (our Recon visit), it is impossible to know exactly which part your specific door needs to operate safely.
We can, but we believe in being honest about costs. For small repairs, the travel charge might outweigh the cost of the repair itself. In these cases, we often recommend finding a reputable, TrustMark approved trader closer to your postcode to ensure you get the best value for money.
📚 Related Customer Care Guides
Need a Local Double Glazing Repair?
Whether you need a full repair service or just a replacement handle, contact the KJM team in Andover today for a free, no-obligation quote.
Contact Our Repair Team