Reflex Elite Windows LTD

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Reflex Elite Windows LTD Reflex Elite are Hertfordshire’s leading quality supplier and fitter of double glazing and uPVC replacement windows, doors and conservatories.

Reflex Elite is Hertfordshire’s leading supplier and installer of double glazing, uPVC & aluminium replacement windows, residential doors, bi-folds, extensions and other home improvement services. Established in 2012, we are a local family business and all our products are made bespoke in our Welwyn Garden City factory in Hertfordshire. Our team of experts supply and fit replacement windows, doors and home improvement services throughout the local area including but not exclusive to Harpenden, Baldock, Hatfield, Stevenage, St Albans, Hitchin, Letchworth, Potters Bar, Hertford & Hemel Hempstead. Get in touch today for a no-obligation quote.

Sometimes old windows aren’t obviously broken. They just look tired, let in draughts and date the whole side of the hous...
18/10/2026

Sometimes old windows aren’t obviously broken. They just look tired, let in draughts and date the whole side of the house, and you stop noticing until they’re replaced. 🪟

This upgrade swapped dated frames with brown surrounds for crisp white uPVC casement windows. The lines are cleaner, the energy-efficient double glazing is sealed properly, and trickle vents keep the rooms fresh without opening a window. We used obscure glass where privacy matters and clear glass where light does.

Thinking about window replacement in Hertfordshire? Get in touch for a free, no-pressure quote.

📍 Welwyn Garden City | St Albans | Harpenden | Hertford
📞 01707 339 400
✉️ [email protected]
Your project. Our expertise.

Same footprint, a completely different room. 🏡This warm roof transformation turned a conservatory that only worked a few...
17/10/2026

Same footprint, a completely different room. 🏡

This warm roof transformation turned a conservatory that only worked a few months a year into an insulated, tiled living space that works in every season. It’s warmer, quieter and a lot more inviting.

Designed and installed by our in-house team across Hertfordshire.

✨ Quality you can trust. Craftsmanship you can see. ✨
📍 Welwyn Garden City – Serving Hertfordshire & surrounding areas
📞 01707 339 400
✉️ [email protected]

Before

After 🙌

Before

After 🤝

Same footprint, a completely different room. 🏡

This warm roof transformation turned a conservatory that only worked a few months a year into an insulated, tiled living space that works in every season. It’s warmer, quieter and a lot more inviting.

Designed and installed by our in-house team across Hertfordshire.

✨ Quality you can trust. Craftsmanship you can see. ✨
📍 Welwyn Garden City – Serving Hertfordshire & surrounding areas
📞 01707 339 400
✉️ [email protected]

Same footprint, a completely different room. 🏡

This warm roof transformation turned a conservatory that only worked a few months a year into an insulated, tiled living space that works in every season. It’s warmer, quieter and a lot more inviting.

Designed and installed by our in-house team across Hertfordshire.

✨ Quality you can trust. Craftsmanship you can see. ✨
📍 Welwyn Garden City – Serving Hertfordshire & surrounding areas
📞 01707 339 400
✉️ [email protected]

Same footprint, a completely different room. 🏡

This warm roof transformation turned a conservatory that only worked a few months a year into an insulated, tiled living space that works in every season. It’s warmer, quieter and a lot more inviting.

Designed and installed by our in-house team across Hertfordshire.

✨ Quality you can trust. Craftsmanship you can see. ✨
📍 Welwyn Garden City – Serving Hertfordshire & surrounding areas
📞 01707 339 400
✉️ [email protected]

Before ➡️ AfterFrom tired old patio doors to a clean, modern sliding door that opens the room up to the garden. Our cust...
11/10/2026

Before ➡️ After

From tired old patio doors to a clean, modern sliding door that opens the room up to the garden.

Our customer’s old doors were letting them down, so we swapped them for new sliding patio doors with slim frames and wide glass panels.

The dark woodgrain finish ties in with the brickwork and the rest of the house, so it looks like it’s always been there. It just works better now.

✨ Professional service. Results that last. ✨
📍 Welwyn Garden City – Serving Hertfordshire & surrounding areas
📞 01707 339 400
✉️ [email protected]

You probably won’t think about your window paperwork again until you come to sell. That’s exactly when it matters.Replac...
10/10/2026

You probably won’t think about your window paperwork again until you come to sell. That’s exactly when it matters.

Replacing windows or doors is notifiable work under Building Regulations. Normally that means a council inspection and extra paperwork. A FENSA-registered installer can self-certify the work instead, and FENSA notifies your local council for you.

Years later, when a buyer’s solicitor asks for the certificate, you’ll have it ready. No certificate can be a red flag, and it can hold up a sale or even stop it.

FENSA registration also means the installer has been independently assessed against safety and quality standards, so it’s more than a logo they’ve added to their website.

Reflex Elite is fully FENSA registered, and our own in-house team carries out every installation.

Our tip: always ask to see the certificate, not just the logo.

Planning a project? We’re here to help.

📍 Welwyn Garden City | St Albans | Harpenden | Hertford
📞 01707 339 400
✉️ [email protected]
Your project. Our expertise.

Take away the corner post and the garden stops being something you look at through a window. It becomes part of the room...
04/10/2026

Take away the corner post and the garden stops being something you look at through a window. It becomes part of the room. ☀️

This corner bifold opens two full sides of the home out to the garden, with slim aluminium sightlines that keep the views wide open even when the doors are closed. Designed, supplied and installed by our in-house team, as an Origin Premium Partner.

Dreaming of seamless indoor-outdoor living? Let’s talk.

✨ Strong foundations. Beautiful finishes. ✨
📍 Welwyn Garden City – Serving Hertfordshire & surrounding areas
📞 01707 339 400
✉️ [email protected]

A front door with a personality. 💛 Swipe for before ➡️Your entrance is the first thing anyone sees, and the first thing ...
02/10/2026

A front door with a personality. 💛 Swipe for before ➡️

Your entrance is the first thing anyone sees, and the first thing you see every time you come home. This bold yellow upgrade has completely lifted the front of the house, built to last, with modern security.

✨ Quality you can trust. Craftsmanship you can see. ✨
📍 Welwyn Garden City – Serving Hertfordshire & surrounding areas
📞 01707 339 400
✉️ [email protected]

Some of our favourite Origin Global window installs 🪟All origin installs come with a 20 year guarantee 💪
27/09/2026

Some of our favourite Origin Global window installs 🪟

All origin installs come with a 20 year guarantee 💪

Draughty windows, misted double glazing, or rising heating bills? These are some of the most common signs your windows a...
26/09/2026

Draughty windows, misted double glazing, or rising heating bills? These are some of the most common signs your windows are due for replacing, and they’re easy to miss when they creep up slowly.

Swipe through for five things to check around your home this autumn.

As local window fitters in Welwyn Garden City, we help homeowners across Hertfordshire work out whether it’s time to replace or not quite yet.

Send us a photo of the window you’re unsure about, and we’ll tell you straight.

✨ Your project. Our expertise. ✨
📍 Welwyn Garden City – Serving Hertfordshire & surrounding areas
📞 01707 339 400
✉️ [email protected]

Swipe for a roof light transformation ➡️Before 🤔…After 🙌✨Fitted by our in house team 🤝Get in touch to discuss what a roo...
20/09/2026

Swipe for a roof light transformation ➡️

Before 🤔…

After 🙌✨

Fitted by our in house team 🤝

Get in touch to discuss what a roof light can do for your home. ✉️

✨ Your project. Our expertise. ✨
📍 Welwyn Garden City – Serving Hertfordshire & surrounding areas
📞 01707 339 400
✉️ [email protected]

Getting a few quotes before you commit is smart. Knowing what to actually ask is what makes the difference. 💭These are t...
16/09/2026

Getting a few quotes before you commit is smart. Knowing what to actually ask is what makes the difference. 💭

These are the five questions we’d want answered if it were our home and they’re the same five we’re always happy to answer about ourselves: in-house team, no subcontractors, insurance-backed guarantee, FENSA registered. ✅

📌 Save this one for when you’re comparing quotes.

Address

12 Little Ridge
Welwyn Garden City
AL72BH

Opening Hours

Monday 8am - 4:30pm
Tuesday 8am - 4:30pm
Wednesday 8am - 4:30pm
Thursday 8am - 4:30pm
Friday 8am - 4:30pm
Saturday 8am - 12pm

Telephone

01707339400

Website

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