When done correctly, double glazing is seamless, offers widespread benefits and withstands the test of time.
We’re one of only a handful of joineries in the UK that manufacturer our own double glazing. We do this because we don’t want to compromise on our mission to keep our wooden double glazed windows and doors as thin and as true to your original windows and doors as possible.
The benefits of double glazing
As well as insulating your house and helping you save money on your heating bills during the winter, double glazing also helps keep your home cool by keeping out the heat in the summer.
Wooden double glazed windows and doors can also:
- Increase the value of your property
- Reduce how much street noise you hear
- Make you feel more safe and secure
- Eliminate water droplet and condensation build-up
Why we make our own double glazing
When buying double glazing from a company that manufactures glass, they offer standard double glazing, typically 22mm, 24mm or 26mm thick. This is because they serve a variety of markets, including uPVC and aluminium windows.
We make our own double glazing in our workshop so that we can maintain our high standards. It means we can offer many more options when it comes to glass than other companies.
It also means we can guarantee our double glazing won’t fail 5 to 6 years’ down the line and you’ll start to see condensation within the glass, which can’t be repaired, only replaced.
How do we make our double glazing?
These days, double glazing is a frame that’s made up of two panes of glass that have been sandwiched together against a spacer. This spacer is then filled with small beads.
These beads act in the same way as the silica beads you get when you buy a new bag. If there’s any moisture or water vapour inside the double glazing, the beads absorb it. We then use a waterproof seal to prevent any water vapour from entering the double glazed unit.
We then remove the air inside and fill it with inert gas. We use Argon, which along with Low E-rated glass, is what achieves that all-important insulation.
A subtle difference
You know when you look at two items and while you can’t put your finger on why, you know that one looks nicer than the other?
It’s mainly down to the glass. The thinner it is, the better it looks, especially when we use the minimum thickness required to achieve the energy rating required by building regulations.
Other companies will say they use thicker glass for energy efficiency and not to save money. But we disagree.
Energy efficiency is measured in a U-Value, and the U-Value is expressed in the unit W/m2k. The lower the value, the more energy efficient the glass.
The requirement by law is to manufacture windows less than 1.5W/m2k. Our windows offer 1.4 W/m2k. To put this into perspective, a single glazed Victorian sash stands at around 5.2W/m2k.
Yes, thicker glass only offers marginally better insulation (1.3 or 1.2W/m2k), but it makes windows really chunky, and simply isn’t worth the trade-off.
Thin vs. thick
Our clients and customers trust that when they place an order with us, even though they don’t 100% understand what they’re getting, they trust it’ll look almost like their original window.
This is particularly important with Georgian windows and windows with glazing bars on them because they are typically found exclusively in conservation areas. They need to be in keeping with the property.
The detail is in the glazing bars. Windows that are produced by other manufacturers tend to incorporate bars that are much thicker and aren’t as discreet as ours.
Why is this? Because they use individual double glazed units, but we take a different approach that enables us to use thin glazing bars, as you’ll discover immediately below…
Glazing bars – explained
The reason why so many wooden glazed windows and doors are so thick is because some companies take the easier approach.
Your original window or door is made up of individual panes of glass and a glazing bar that holds the glass sheets in place. It’s made up of a central stem and two rebates that the glass sits in.
If you wanted an individual pane of double glazing built in the same way as the original, the glazing bar needs to be 38mm thick. You’d still have a central stem, but the rebates need to be much larger to cover the frame (spacer) of the double glazing.
Some companies happily do this because it doesn’t take much time, skill or labour to order glass like this, but the overall look is far from desirable.
Our aim is to retain the original look, so we put a spacer between the glass to give the illusion of individual glass panes, but it’s actually just one sheet of glass.
Wooden double glazed windows & doors – the glazing options
Toughened glass is required on all doors and windows below a certain height. It goes through a tempering process – it’s heated, cooled and heated again to make the glass stronger. But when it breaks, it shatters into a million tiny pieces.
Laminated glass is more secure than toughened glass and holds together well even when broken – just like a car windshield. Some of our customers who are particularly worried about burglars prefer this option.
Acoustic glass is popular in the city because there are so many busy roads and general noise to block out. It’s made up of two 3mm thick panes of glass, with a special acoustic dampening interlayer.
Obscure glass is available in all sorts of different options, the most common being sandblasted frosted, which is also known as satin. However, if you have a special preference or have found something different online, we can source it for you.
Low iron glass is made with lower iron content, is clearer and has a reduced tint. It’s barely noticeable to the untrained eye, which is why some of customers really like the idea and some architects specify it.
Solar control glass does have quite a noticeable tint and is used in areas where the sun penetrates throughout the day, turning rooms into saunas! It reduces the amount of heat that comes through the glass and maintains the room temperature.
Stained glass is a work of art in itself! We partner with Coriander Stained Glass. They can make brand new stained glass panels or refurbish existing stained glass that we then fit. The result is always stunning!
Lead and coloured glass is just as eye-catching as stained glass and because we have our own glass shop, we can copy any lead pattern and use 6mm, 9mm or 12mm thick lead, depending on the original glass. We can also create double-glazed coloured glass units, and are one of very few companies to do so!