Ask most window company owners what keeps them up at night, and it is rarely the fitting team. It is the gap on Thursday afternoon, the surveyor who came back from three appointments with one quote, and the £600 spent on leaflets that produced two calls, both of them non-homeowners.
Double glazing marketing has become harder to get right, not because homeowners stopped buying windows, but because there are now a dozen ways to spend money reaching them and only some of them put a salesperson in front of a homeowner who can actually say yes. This guide runs through the routes window companies typically use, what each one is genuinely good at, and the one change that does the most to fill a diary.
The Demand Is Still There, Even When The Market Feels Quiet
Energy Efficiency Keeps Pulling People Back To Windows
Replacement windows in existing homes have to meet a minimum standard of a 1.4 U-value or a Window Energy Rating of band B under Approved Document L, with the 2026 edition taking effect on 24 March 2027 for most building work in England. Homeowners do not read Building Regulations, but they do feel draughts, and they do read their energy bills.
The Energy Saving Trust puts a set of A-rated windows for a semi-detached house at around £4,800, saving roughly £85 a year on energy bills in Great Britain along with about 290kg of CO2. (That is not a payback story on its own, which matters for your sales approach. People buy windows for comfort, noise, security, damp and how the house looks. Savings are the justification, rarely the reason.
Half The Country Has Already Bought Windows Once
FENSA is the government-authorised scheme monitoring building regulation compliance for replacement windows and doors, and it has issued more than 13 million certificates, covering roughly half of UK homes. Every one of those installations is now ageing. Failed units, blown seals, tired white PVCu from the early 2000s and worn handles are a permanent, renewing market. Your buyer is often somebody who bought windows twenty years ago and has not thought about them since.
What Double Glazing Marketing Actually Has To Do
Marketing for a double glazing company has two separate jobs, and confusing them is where budgets get wasted.
The first job is being believed. Homeowners are letting a stranger into their house to quote thousands of pounds on a product they cannot easily compare. They will look you up, and what they find decides whether they take the appointment seriously.
The second job is being booked. Somebody has to turn interest into a confirmed date, at a time both decision-makers are home, at a property you can actually work on. Most companies pour money into the first job and hope the second one happens by itself. The routes below sit in one camp or the other, and knowing which is which changes how you judge them.
The Routes Most Window Companies Try
Local SEO And Your Google Business Profile
Ranking for “windows in [your town]” and holding a strong review profile is the cheapest long-term source of enquiries there is. Fill out your Google Business Profile properly, build a page for every town you cover, add real photos of your own installations rather than stock images, and ask every customer for a review the week you finish their job.
Slow to build, and it will not fill next month’s diary. Worth doing anyway, because it is the single biggest thing that makes homeowners trust you before you knock.
Word Of Mouth And Referrals
Still the best quality work you will ever get. Referred customers arrive pre-sold, haggle less and cancel less. The catch is volume and timing: referrals turn up when they turn up, and no growth plan survives on them alone. Ask for them properly instead of waiting, with a card left at handover and a call a fortnight after the job.
Traditional Double Glazing Advertising
Leaflets, local press, radio, sponsored roundabouts and wrapped vans all still work in the right area, particularly for older homeowners in towns where your name means something. Traditional double glazing advertising is best understood as brand building rather than lead generation. A leaflet drop makes your next call warmer. It rarely produces a booked diary on its own, and the response rates that made it viable in 1998 are long gone.
Paid Advertising On Google And Meta
Fast, controllable, and the quickest way to test a new area. Also unforgiving. Windows is a competitive auction, you are bidding against nationals with deep pockets, and the enquiry is only worth something if somebody rings it back within minutes. Budget for a learning period of at least three months and somebody to actually manage it week to week.
Buying Leads, And The Spreadsheet Problem
Plenty of lead generation companies will sell you window enquiries, and some do it well. The issue is what usually arrives: a spreadsheet of names and phone numbers. Your team then does all the hard work of ringing, re-ringing, discovering half of them rent, and booking whoever is left. Two things to check before you buy. First, how many other installers received the same row of that spreadsheet, because shared leads mean you are quoting against companies who got the identical enquiry at the identical moment. Second, ask to see the consent trail. Under UK direct marketing rules, consent must be freely given, specific and informed, and people have an absolute right to opt out at any time. If a homeowner complains about how they were contacted, your company name is the one they remember.
The Watts Way: Exclusive Appointments Booked Straight Into Your Calendar
Watts Marketing sells one thing, and it is not data. Every homeowner is called by UK-based agents in-house, checked against criteria agreed with you, and booked into your sales calendar at a confirmed time. Your salesperson opens their diary, sees a date, a time and a full brief, and drives to a house where the people who own it are expecting them. No list to work through, no chasing, no wondering whether anybody will answer on the fourth attempt. That is the difference between buying double glazing leads and buying a diary that is already full.
Exclusive Means One Company, Not Two Or Three
This word deserves picking apart, because across the industry “exclusive” often still means the same homeowner has been sold to two or three installers. Every appointment booked by Watts goes to a single company and is never resold. One installer, one quote, one conversation with those homeowners. Your salesperson is not the third person through the door that week, and your price is not being measured against an identical offer that landed the same morning.
Qualified Before It Ever Reaches Your Diary
Agents confirm ownership and tenure, screen credit for CCJs and debt management arrangements, check the property is one you can actually work on, which means owner-occupied houses and bungalows rather than flats, rentals or listed buildings, establish a genuine buying timeframe and confirm every decision maker will be present. Homeowners come to Watts rather than the other way round, so there is no cold calling anywhere in the process. Bookings are compliance-checked before delivery, and anything that does not meet the agreed standard is returned for credit.
A Track Record Built On One Model
More than 290,000 double glazing appointments have been booked since 2015, contributing over £725 million in revenue for partner installers, with more than 2,000 appointments a week going into partner diaries across all sectors. Campaigns go live within days, there is no contract, and you can start on a small volume and scale once your own figures back it up. Installers who want the detail on volumes and postcodes can find it on the window leads page.
Why Booked Appointments Win On The Numbers
The figure that decides your year is cost per install, and it has to include your own team’s time.
Take 100 shared leads at £25, so £2,500. Reach 60 of them, sit in front of 20 and sell 6, and the paper figure is £417 per install. Then add 25 hours of calling, two wasted trips to houses where only one partner was home, and the fact that all six sales were won against two other live quotes on the same job. Load the sales time in and the real number climbs well past £500, with your margin cut on every sale.
Now take 20 exclusive booked appointments. Sit in front of 18, sell 6, and your cost per install lands in a similar place, except nobody spent the week on the phone, the surveyor never drove to an empty house, and you were the only quote on that table. If exclusivity lets you hold even £300 more margin on each job, the appointment route has paid for itself twice over.
Do Not Switch Everything Else Off
Booked appointments fill the diary. They do not, on their own, make a homeowner trust you.
The two work hand in hand. When your van is recognised locally, your reviews are recent and strong, and your website looks like a real company with real installations on it, the appointment that lands in your calendar converts better, because the homeowner has already half decided you are a safe pair of hands. When your name means nothing, your salesperson spends the first twenty minutes earning permission instead of selling windows.
Keep the SEO, the reviews, the referral asks and the local presence running as the foundation. Buy appointments to fill the diary now. Companies that do both consistently are the ones still growing in a quiet quarter.
How To Sell Double Glazing Once You Are In The Room
A booked appointment only pays for itself if the visit goes well, so it is worth being deliberate about how to sell double glazing rather than leaving it to the personality of whoever is on the rota.
- Read the brief before you knock. Property type, what prompted the enquiry, who will be there. Walking in informed changes the first two minutes entirely.
- Insist on both decision makers. A quote left with one partner is a quote that gets discussed without you in the room.
- Lead on the problem, not the product. Draughts, condensation, noise, security and how the house looks all beat a spec sheet.
- Show, do not tell. A corner sample, a locking mechanism they can feel and photos of a job on a street they know do more than any brochure.
- Price once, properly. Dropping thousands to close on the night teaches homeowners the first number was invented, which is the fastest way to lose trust.
- Follow up when you said you would. A large number of window sales are lost to silence rather than to a competitor.
A 90 Day Plan For Marketing Your Double Glazing Company
- Week one: work out your true cost per install for every source you use now, including wasted appointment time, fuel and sales hours.
- Week two: fix the foundations. Google Business Profile complete, your own installation photos uploaded, a page per town, a review request built into handover.
- Week three: write down your appointment criteria. Property type, tenure, credit position, timeframe, all decision makers present.
- Weeks four to six: test exclusive booked appointments at a small volume against those criteria and track every single one through to sale.
- Weeks seven to twelve: put your budget behind whatever delivered the best cost per install and the strongest margin, keep the brand and review work running underneath it, and review the numbers monthly.
Bringing It Together
Demand for windows has not gone anywhere. Half the homes in the country have already had replacement units fitted and are due again, energy standards keep the conversation alive, and homeowners still want the draught gone before winter. The hard part has never been finding interest. It is turning interest into a salesperson sitting in front of two homeowners who own the house, can be financed, have a property you can work on and are expecting the visit.
Good marketing for a double glazing company comes down to three habits. Judge every option on cost per install rather than cost per lead, keep your brand and review work running so people believe in you before you arrive, and insist on exclusivity in writing from anybody selling you enquiries. Measured that way, exclusive booked appointments are the shortest route from a gap in the diary to a signed order.
To talk through volumes, postcodes and qualification criteria for your business, call the Watts Marketing team on 01603 971808 or get in touch through the website. Live within days, no contracts, and every appointment yours alone.