Getting quotes for new windows and doors isn’t exactly anyone’s idea of fun. It’s one of those necessary evils of homeownership, like clearing the gutters or trying to get through to a human at your energy supplier.
But when you’re spending serious-ass money on double glazing, the last thing you want is a dodgy quote, hidden extras, or some slick salesperson trying to “call their manager” for a discount that mysteriously expires in 15 minutes.
I’ve been in this trade for a long time, and I’ve seen it all. From customers who’ve been quoted £10,000 for a single door, to others who were told their 1990s uPVC windows were “leaking radiation” (Brad do you have a crazy story or 2 for this bit?).
So here it is… our no-nonsense guide to what a proper double glazing quote should look like, written by someone who actually fits the stuff, not just sells it.
A decent installer starts with a conversation, not a calculator.
If the first words out of someone’s mouth are, “How much are you looking to spend?”, that’s your cue to politely show them the door. A real professional wants to know about your home, not just your wallet.
We’ll ask things like:
- Is your home older, where matching the original style matters?
- Are you freezing by the windows every winter because of draughts?
- Is it condensation, noise, or just dated looks that bother you most?
You can tell a lot from that first chat. The right installer will listen, explain, and advise. The wrong one will try to upsell you glass so high-tech it probably talks to satellites. If you don’t feel comfortable after five minutes, trust your gut, that instinct’s saved more homeowners than any guarantee ever will.
Measure Twice, Quote Once
Before a real quote lands in your inbox, someone should have actually turned up. Measuring through photos might be fine for guessing a sofa size, but not for custom-built windows.
A good installer comes out, tape measure in hand, and actually looks at the job. We’ll spot things others won’t, like crumbling plaster, uneven brickwork, or those “DIY special” frames that look like they were fitted with hope and a hammer. Why? Because surprises cost money. If you get a quote without a visit, you’re basically agreeing to “we’ll figure it out later” – and “later” usually means extra costs.
The Quote Itself
Now for the paperwork (or the email). A decent quote isn’t a single line that says “Windows – £5,000.”
It should spell out everything, clearly and simply. You should see:
- The window and door types you’re getting (sash, casement, tilt and turn, etc.)
- The material (uPVC, aluminium, timber)
- The glass type, double or triple glazing, low-E coatings, gas fills, the lot
- The energy rating (A-rated or above, anything less is yesterday’s news)
- The colour, handles, locks, and hardware
- Whether disposal of your old windows is included (you’d be amazed how many “forget”)
- What’s covered under warranty and for how long
If your quote leaves you with questions like “Does that include installation?” Maybe you should walk away. You shouldn’t need a degree in detective work to understand what you’re buying.
We’ve all seen it: the rep who shows you a number so big you nearly fall off your chair, then gasps dramatically before saying, “But… let me see what I can do for you.” Cue fake phone call, sudden “manager’s discount”, and a “today only” offer. If it sounds like a performance, that’s because it is.
Good installers don’t do theatre. We don’t “slash prices.” We don’t make up numbers to knock them down again. We give you a fair price based on materials, labour, and experience, and it’ll still be fair tomorrow. Cheaper doesn’t mean better. It usually means someone’s cutting corners, using cheaper materials, or paying less experienced fitters. In the long run, it’ll cost you more when you’re fixing leaks or replacing failed seals two winters later.
The Guarantee
Every decent installer offers two types of guarantee: one from the manufacturer and one for the installation. The manufacturer’s guarantee covers the product itself, so if a frame warps or glass fogs up between panes, you’re protected. The installer’s guarantee covers the workmanship. And if they’re FENSA or CERTASS registered, you’ll also get a certificate that proves your installation meets building regulations. That bit of paper might not sound exciting now, but when you go to sell your house, you’ll be glad you’ve got it.
No registration, no certification? That’s a dealbreaker. It’s like buying a car without an MOT.
The Aftercare (Or the “You Can Still Call Us” Bit)
This is where local installers really shine, and where a lot of big firms fall flat.
A good local fitter doesn’t disappear the minute the van leaves your driveway. If something needs adjusting or you just have a question months later, we’ll come back. No waiting on hold, no “ticket numbers,” no emails that vanish into the void.
I’ve had customers ring me a year later saying, “Sorry to bother you, but my door handle feels stiff.” It’s never a bother. I’d rather fix it in five minutes than leave someone frustrated.
Aftercare matters because it’s about respect. Your home isn’t just another job to tick off — it’s personal. And we know you’ll talk about us to your friends, family, and the neighbours watching over the fence. That’s why we stand by what we fit.
Comparing Quotes
Once you’ve got a few quotes, it’s easy to go cross-eyed trying to compare them. One company’s £4,000, another’s £6,000, and one bloke from Facebook says he can “do it cash” for £2,000 and “throw in a cat flap.”
Here’s the truth: you’re not comparing prices… you’re comparing quality, service, and trust.
Ask yourself:
- Who took the time to actually explain things properly?
- Who listened when you talked about your home?
- Who seemed genuine, not pushy?
That’s usually the one to go with. It’s not always the cheapest, but it’s the one that won’t have you chasing them six months later because your window won’t shut.
Red Flags
Here’s my top list of “nope” moments that every homeowner should watch for:
- “I can do it cheaper for cash.” (Translation: no warranty, no comeback.)
- “You have to sign today.” (Desperation wrapped in salesmanship.)
- “We don’t do written quotes.” (You’ll regret that one.)
- “I’ll throw in a free conservatory roof if you act now.” (You won’t.)
If your gut says something’s off, listen to it.
A good quote should feel like a breath of fresh air. It should be clear, detailed, and professional. You shouldn’t feel rushed, confused, or pressured. You should feel like the installer genuinely wants to help you make the right choice, even if that means telling you something you don’t want to hear.
Because here’s the thing: a good installer doesn’t want a quick sale. We want happy customers who call us back in ten years when they need new doors, or who tell their friends, “You should go with them because they actually care.”
That’s how we’ve built our reputation, one job at a time.
Double glazing quotes don’t have to be a minefield. Find someone who listens, explains things clearly, and makes you feel at ease.
Remember, you’re not just buying glass and frames. You’re investing in warmth, comfort, and peace of mind for years to come. And if you ever feel like you’re being rushed, pressured, or bamboozled with “manager discounts,” take a deep breath, shut the door politely, and call a local expert who’ll treat your home the way it deserves.
Because at the end of the day, good glazing isn’t just about the product. It’s about people who care enough to fit it properly.
