‘Mind the Gap’ Why Choosing the Right Window Installer is Everything

Timber - PVC - Aluminium - Windows, Doors & Conservatories in Hampshire

‘Mind the Gap’ Why Choosing the Right Window Installer is Everything

‘Mind the Gap’ Why Choosing the Right Window Installer is Everything

Category: Advice & Guidance

Reading Time: 7 Minutes

📌 The 30-Second Summary

  • Research is Vital: Don’t just trust a flyer. Check specific reviews on Which? Trusted Traders, Google and Checkatrade.
  • Visit a Showroom: If they don’t have a physical address you can visit, where will you go if something goes wrong?
  • Watch for “Sales Pressure”: If a company forces you to sign “today” for a discount, walk away immediately.
  • Check the Guarantee: Ensure it is an Insurance Backed Guarantee (IBG) covering at least 10 years of service.

Buying double glazing is one of the biggest investments you will make in your home. It can feel overwhelming, and the industry unfortunately still has a reputation for pushy sales tactics and “here today, gone tomorrow” cowboy builders.

But it doesn’t have to be that way. By asking the right questions, you can filter out the bad apples and find an installation partner who cares about your home as much as you do.

A KJM Group sales advisor shaking hands with a happy customer, representing our strict no-pressure sales promise.
🔍 Enlarge
Trust is earned, not forced. We believe in honest advice and a strict no-pressure sales environment.

1. The “Digital Detective” Phase

A recommendation from a friend is a great start, but it isn’t enough. You need to verify the company’s track record over time.

Don’t just look at the star rating; read how the company responds to reviews. Do they own their mistakes? Do they solve problems?

Where to Check What to Look For
Checkatrade Look for consistency over years, not just a sudden burst of recent reviews. Pay special attention to their ‘Tidiness’ and ‘Reliability’ scores.
Which? Trusted Traders This is much harder to get into than other schemes. It involves strict code-of-conduct checks and random interviews with past customers.
Companies House Check exactly how long they have been trading. A 10-year guarantee from a company that opened last year is risky. (For context, KJM has traded continuously since 1983).

2. The Showroom Test

A “Man in a Van” might be cheaper initially, but does he have a physical address? If a company has invested heavily in a permanent showroom, it proves they are established, financially stable, and accountable.

Visiting a physical showroom (like our headquarters in Andover) allows you to:

  • Touch the Product: Physically inspect the quality of the corner welds, the hinges, and the clarity of the glass.
  • Compare Colours: “Anthracite Grey” looks vastly different on a glossy computer screen than it does in natural daylight.
  • Meet the Team: Are you speaking to helpful technical advisors, or aggressive, commission-hungry salespeople?

3. The Sales Pitch (Red Flags)

This is arguably the biggest complaint in our entire industry. You invite someone round for a quick quote, and three hours later, they still won’t leave your kitchen until you sign a contract.

⚠️ The “Sign Today” Scam

If a salesperson says: “I can call my manager right now to get a special discount, but only if you sign today,” this is a high-pressure manipulation tactic.

A reputable home improvement company will give you their best, honest price upfront and leave you with a written quote to think about in peace.

At KJM, we operate under a strict No Pressure Promise. We measure up, we provide the quote, and we let you decide on your own schedule. No hard sell, ever.

4. Energy Ratings & Specs

Not all “white plastic windows” are the same. When comparing quotes from different installers, you absolutely must compare the technical specification.

Does the suspiciously cheap quote actually include:

  • A-Rated Efficiency? Independently verified by the BFRC.
  • Argon Gas Cavities? Essential for thermal insulation.
  • Warm Edge Spacers? To actively prevent perimeter condensation.
  • Security Credentials? Are the frames PAS24 certified with modern multi-point locks?

5. Who is Installing?

You might buy from a fantastic, knowledgeable salesman, but who is actually turning up to cut holes in the side of your house?

Some national companies sub-contract all their fitting to the lowest local bidder. This means the team turning up on your driveway might have never actually worked for the company before. You want a local company that uses dedicated, regular installation teams who know the products inside out and are personally accountable for their work.

6. KJM Group’s 5-Point Quality Installer Checklist

Requirement Why It Matters
Accreditation (e.g., FENSA/GGF) Ensures the installer meets current building regulations (like Document L) and can legally self-certify compliance, saving you a massive local authority hassle.
Own Employed Fitting Teams Subcontracted labour often leads to inconsistent quality. Employed, dedicated teams are heavily invested in the company’s long-term reputation.
No Pressure Sales Policy Indicates an ethical business model focused on customer needs, rather than chasing immediate, high-margin sales targets.
Long-Term Credentials (Which?) Independent endorsement from strict bodies like Which? Trusted Traders proves a sustained, multi-year track record of quality and customer satisfaction.
Comprehensive Warranty Look for a warranty that covers both the manufactured product AND the physical installation work for maximum peace of mind.

🏆 Proof of Technical Excellence

While customer reviews highlight excellent service, national manufacturer awards prove pure technical capability. We are incredibly proud to announce that KJM Group was recently named the national Ultraframe Installation of the Month for executing a highly complex flat roof and bifold door transformation.

➤ Read the award-winning Romsey case study here

7. The Reality of Home Improvement: Our 100% Commitment

We will be brutally honest with you: absolute perfection in construction does not exist.

When you are removing structural materials, dealing with unpredictable British weather, and managing complex supply chains, minor hiccups can occasionally occur. A glass unit might arrive with a scratch from the factory, or a newly fitted door hinge might need a slight adjustment after a week of settling.

What separates KJM Group from the rest of the industry is not the illusion of a flawless 5.0 rating, but our 100% commitment to making things right.

We genuinely look after our customers. If there is a problem, our dedicated after-sales service team will return to your property and resolve it. We do not hide behind small print, and we do not ignore phone calls once the final invoice is paid. Our reputation as one of the most trusted glazing companies for miles around Andover and Hampshire is built entirely on accountability, honesty, and four decades of standing firmly by our work.

8. Frequently Asked Questions

FENSA is a government-authorised scheme. A FENSA certificate proves your installation legally complies with strict Building Regulations. Without it, you may face severe legal and financial issues when you eventually try to sell your home.

Yes. Even the very best installations can have minor settling issues as the house shifts. A reputable installer will always return promptly to adjust stiff hinges or realign seals after the installation to ensure you are 100% happy.

A true comprehensive guarantee should cover the uPVC frames against discolouration, the glass against seal failure or internal misting, and the moving hardware like handles and hinges. Always ask to see the warranty terms in writing before you pay a deposit.

×
Mark Pearce

Start Your Free Online Quote

Get a Quote

Awards and Accreditations

Latest Blog Posts

Why Bifold Doors Are Popular in Winchester Homes

Why Bifold Doors Are Popular in Winchester Homes

Why Bifold Doors Are Popular in Winchester Homes 📍 Local Home Improvement Guide From terraced townhouses to expansive country properties, … Continued

READ MORE
Can You Paint a uPVC Door? | The 2026 UK DIY Guide

Can You Paint a uPVC Door? | The 2026 UK DIY Guide

Can You Paint a uPVC Door? | The 2026 DIY Guide 📍 Home Improvement Guide Everything you need to know … Continued

READ MORE
How Much Should a New Front Door Cost Installed? | 2026 Price Guide

How Much Should a New Front Door Cost Installed? | 2026 Price Guide

How Much Should a New Front Door Cost Installed? | 2026 Price Guide 📍 Hampshire & Berkshire Pricing Guide A … Continued

READ MORE

© 2026 KJM Group Ltd

Cookie Policy Privacy Policy T&C's

Contact Us

Online Quote