Buy Sealed Double Glazing Units Online

Woodcocks Glass supply made to measure double glazing sealed units to your specifications using our simply to use online ordering system.

We deliver locally to a 15 mile radius of our plant in Westerham, Kent. We can offer delivery options to other locations in the UK but please check with us by email first. Alternatively, we offer a collection service.

Woodcocks Glass manufactures and supplies double-glazed units to your specifications. If you don't want to create your double glazing panels yourself using our website, Woodcocks Glass also offers a measure and fit service. We can come to your premises and measure up your panels; we can also select matching glass and fittings for your replacement double-glazed units.

Simply fill in our Double Glazed Unit Configurator below, select whether you want to pick up or have the units delivered, and away you go. Save time and money on custom-built sealed units for every kind of home!

Why order your double glazing units online?

Ordering direct means you're not paying for a salesperson, a home visit, or a showroom — just the glass, cut and sealed exactly to your measurements. That's why our prices are typically lower than high-street double glazing suppliers, without any compromise on quality. Every unit is manufactured at our own plant in Westerham, Kent, using the same glass and spacer bar options trade installers use.

How it works

  1. Measure your window opening: Our step-by-step instructions show you exactly how to get an accurate width and height.
  2. Choose your glass: Select your outer glass, inner glass, spacer bar colour and width, and any extras like toughening, patterns or a even a cat flap hole.
  3. Add to your order: Build up as many units as you need, all in one order.
  4. Collect or arrange delivery: Collect from our Westerham plant, or we deliver locally within 15 miles. We can also discuss delivery further afield by email.

Not sure which glass to choose? Our glass options guide explains the difference between standard, Low Emissivity, and Planitherm glass in plain English — or get in touch and we're happy to advise.

Local to Kent, Surrey and South London

We manufacture and deliver double-glazed sealed units to homes and trade customers across Westerham, Sevenoaks, Tandridge, Reigate, Redhill, Merstham, Croydon, Bromley and the wider Kent, Surrey and South London area. If you'd rather not measure and order yourself, we also offer a measure and fit service — just get in touch, and we'll come to you.

Double Glazed Unit Configurator

Please Allow Scripts

Please Note: Deliveries are currently 7-10 working days for toughened glass and 3-5 working days for everything else.

Patterned Glass Solutions

Explore our range of Pilkington texture glass.

Toughened Glass for Double Glazing

High-quality glass at great prices.

Frequently Asked Questions

How do I measure my window for a replacement double glazed unit?

Measure the width and height of the glass itself, not the frame, at the narrowest points. Our step-by-step Instructions page walks you through the full process. If you don't want the faff, call and we can come out and measure up for you, then return and fit. There is an additional charge for this.

What's the difference between 4mm and 6mm glass?

6mm glass is thicker and stronger than 4mm, and is generally recommended for larger units. Both are available in clear or Low Emissivity (Softcoat) options, which reflect heat back into the room for better insulation. Go to this page for more glass options. You can also choose a differnet thickness/type of inner glass for your sealed glazing units.

Do I need toughened glass for my window?

UK building regulations require toughened glass in certain locations — for example, low-level glazing, doors, and glazing near floor level. If you're not sure whether your window needs it, get in touch and we'll advise before you order.

What about patterned glass

For privacy or simply for style, you can order Pilkington patterned glass of varying opacities. We even have a type of unit that can work like a blind within the glass and reduce sunlight/increase privacy, if needed.

How long does delivery take?

Standard units typically take 3-5 working days. Toughened glass units take 7-10 working days due to the additional processing involved.

Do you deliver outside Westerham?

We deliver locally within a 15-mile radius of our plant at no extra cost. For locations further afield, email us to check delivery options, or arrange collection.