There comes a point in every homeowner’s life when the windows stop doing their job. Maybe the draughts have become a little too noticeable. Maybe the condensation between the panes is driving you mad. Or perhaps you’ve finally had enough of paying eye-watering energy bills for heat that seems to vanish the moment it leaves the radiator.
Whatever the trigger, you’ve made your decision is made, and it’s time for new windows. Well done, you’ve already made the first step towards a warmer, quieter, and more secure home.
However before you get to enjoy all benefits of your new windows, there’s a crucial question you need to answer:
Who’s going to fit them?
It sounds simple enough, but choosing the right double glazing installer can feel like navigating the underground for the first time. There are plenty of companies out there, each promising the best service, the best products, the best price… but how do you tell the genuine professionals from the ones who’ll leave you with the crappy experience that tarnishes the industry (and possibly windows that don’t even open properly)?
The good thing is, with a little preparation and a clear idea of what to look for, you can find an installer you can trust.
Here’s our guide to making the right choice.
Do Your Homework
It might sound obvious, but you’d be surprised how many people skip this step and end up relying on the first leaflet that drops through the door. Before you let anyone near your home with a tape measure, spend some time researching local installers.
Look at online reviews, testimonials, and trade accreditations. A good installer will have a trail of happy customers behind them. If all you can find is an unclaimed Facebook page with a blurry logo, it’s not the most reassuring sign.
The key is consistency, one glowing review could be written by anyone. Dozens of positive experiences spread across different platforms are harder to fake – and much more reliable.
Brad’s tip: Look out for reviews that mention specific details, like “the team turned up on time every day” or “they left the house spotless.” That’s the kind of real-world feedback you can trust.
Experience Counts
Double glazing isn’t new. It’s been around for decades, which means there are plenty of experienced installers out there, but experience isn’t just about years on the job – it’s about the variety of projects someone has worked on.
If you live in a Victorian terrace, you’ll want an installer who understands sash windows and heritage-style frames. If you’re in a new build, you’ll want someone who’s familiar with modern casements and energy-efficient upgrades.
When you’re talking to installers, ask them for examples of similar work they’ve done. A reputable company will be more than happy to show you photos, case studies, or even put you in touch with past customers. If they dodge the question or only show you generic stock photos, treat that as a warning sign.
The Price Question
Price is usually the first thing most of us think about. Windows aren’t cheap, and the temptation to grab the lowest quote can be strong, but here’s the thing: when it comes to double glazing, cheap doesn’t always mean cheerful.
That bargain-basement quote might not include fitting. Or aftercare. Or, in some cases, the actual windows. Hidden costs are the oldest trick in the book.
Instead of focusing on price alone, compare the details.
Does the quote break everything down clearly?
Does it include removal of your old windows?
Does it cover things like trims, sealants, and finishing touches?
A transparent, itemised quote is worth its weight in gold. Think of it this way: you wouldn’t choose a holiday just because it’s the cheapest one in the brochure. You’d want to know if it includes flights, luggage, and meals. Windows are no different.
Energy Ratings Matter
Windows are about more than looks. They’re about performance. The right double glazing can transform how warm and comfortable your home feels, and how much you pay to heat it.
Always ask about energy ratings. A-rated double glazing is designed to keep the heat in during winter and reflect excess warmth in summer. That means lower bills and fewer cold draughts, all year round.
If an installer looks confused when you bring up energy ratings, that’s your cue to move on to the next installer. The right professional will happily talk you through the different options and explain how they’ll benefit your home. Always make sure you check what they claim!
Keep It Local
There’s something reassuring about working with a local company. Not only are they easier to reach if you need them, but they’re also more likely to care about their reputation in the area, a lot will work off of things like Google Reviews, word of mouth etc.
A local installer knows the quirks of the houses in your area, whether it’s the bay windows of 1930s semis or the heritage features of older cottages. They should also be understanding of any planning considerations that might apply. If something does go wrong, it’s much easier to chase down a company in the same county than one based 200 miles away.
Guarantees and Aftercare
Windows should last donkeys years, but like anything, things can go a bit awry. Locks can stiffen, hinges can wear, seals can fail, that’s why guarantees and aftercare are so important.
A trustworthy installer will offer solid warranties and won’t disappear the moment the last pane is fitted. They’ll stand by their work and be available if you ever need adjustments.
Don’t be shy about asking what’s covered, how long the guarantee lasts, and what the process is if you ever need to use it. If the installer brushes it off or offers vague answers, consider that a big red flag.
Communication Is Key
This one’s often overlooked, but it’s crucial. A good installer should make you feel comfortable from the very first conversation. They should answer your questions clearly, explain the process, and keep you informed every step of the way.
If they’re hard to reach before you’ve even signed a contract, imagine how difficult they’ll be to get hold of once they’ve been paid.
Trust your gut here. If someone feels pushy, evasive, or uninterested, they’re not the right choice. The right company will want you to feel confident and reassured throughout.
Our Thoughts
Choosing a double glazing installer isn’t something you do every day, but it’s a decision that will affect your home for years to come. The right company will deliver windows that not only look fantastic but also perform brilliantly, keeping your home warm, secure, and energy-efficient.
Take your time, ask the right questions, and don’t be swayed by price alone. Look for experience, transparency, and a company that genuinely cares about the homes they work on.
And when you finally settle into your draught-free living room, with lower energy bills and windows that actually open when you want them to, you’ll be glad you chose wisely.
Because in the end, double glazing isn’t just about glass and frames. It’s about trust, comfort, and making your house feel more like a home.
