Materials Double Glazing Glass types
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Double Glazing Glass Types

Most dry double glazing gasket systems soon shrink and rot in time, leaving you with leaks and problems. Our energy efficient glazing method, which is unique to us, and is approved by the Glass & Glazing Federation, is a tried and tested method over many decades, which combines the use of butyl and silicone. Our system has never failed our customers once, and ensures two superior seals around your glass, so you can be sure that there are no leaks or problems, ever. Our 14mm slim glass is sealed with true putty and painted over, just like the originals 100 years ago.

Double Glazing Glass Types 24mm & slim glass

Double glazing glass is one of the biggest factors in energy savings these days. Our glass surpasses all UK requirements and standards. Our 24mm double glazed, argon filled, Guardian Glass, has been tested and passed BSI EN1279 certification.

The most optimal, energy efficient & cost effective double glazing is 24mm overall, not 20mm and not 28mm.  Our 24mm optimal glass is made up with a 4mm LowE soft coat inner pane – 16mm argon gas filled air gap with warm edge spacer bars – and 4mm float glass to the outer pane. This gives the glass a u-value rating of 1.0 to 1.1 wm²k. Our “Climaguard Premium Info” glass is made by “Guardian Glass”. It is used as standard in our products. Our toughened or laminated safety glass usually comes stamped to show you it is safety glass, otherwise it will be certified as such.

Incorporating warm edge spacer systems we are able to achieve optimal energy efficiency values. These warm edge spacer bars come in either black or white. We always recommend the black spacer bar as it looks neater and sharper, even if the windows or doors are white. Some manufacturers will use and offer you 20mm Double Glazing, which does look slimmer, but be aware that the energy efficiency deteriorates significantly if the glass unit is any slimmer than 24mm, if still filled with argon gas.

How low-E glass works
on warm days

Low e glass

Sun’s direct intensity, short wave infrared heat energy, strikes the glass surface and surroundings converting this energy into long wave (low energy) infrared heat.


The Low-E coating assists in rejecting this heat back outside.

How low-E glass works
on cold days

Double glazing low e glass

Typical oil bar heater energy and stored energy being released from floors (this stored energy may passively collect during the day from the sun’s direct transmission.


The Low-E coating assists in reflecting this heat back inside.

slim glass 14mm in heritage sash

Our heritage sash window, pictured here, is glazed the old fashioned way with separate glass units glazed into the sash Georgian bars with real putty. Once the units are sprigged and puttied into position, the glass is taped up and the windows get another coat of paint to protect the putty and blend it in with the frame.

The Heritage super spacer is used to achieve minimal sight lines. The glass is very slim at 14mm (4mmLowE – 6mm Krypton – 4mm float) and is filled with Krypton gas as this is the best energy efficient solution for slim double glazing glass.

As you can see these sash windows look like the originals and the double glazing is almost invisible.

Perfectly suited for Listed Buildings and Conservation areas to maintain the true heritage appeal.

Sandblasted obscure glass
Cathedral obscure glass
Stippolyte obscure glass
Niagara obscure glass
Cotswold obscure glass
Flute obscure glass

Clear glass

Laminated glass

Acoustic glass

Diamond Lead/Square Lead

Coloured Lead

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