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Single Glazing

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Single Pane Glass Cut To Size

Order as float, toughened or laminated single glazing.

Single glazed windows are glazing units made using one pane of glass that is usually 4mm thick. That single glass pane protects the interior of the room from the outside atmosphere with a glass that can range from 3mm to 12mm in depth. It can be specified thicker for specialist applications. This type of glazing is perfect for a retro fit to listed period properties that may be bound by conservation orders.

Single pane

Single Glazed Windows

Using only a single pane of glass rather than two panes for double glazed windows makes the cost of glassware significantly cheaper. It also means that there is no condensation between the glass, and it retains a lot less heat in the summer, meaning it will keep interiors cooler.

However, this also does mean that during winter it may be more difficult to keep the room warm due to the lack of heat retained. As an example, with 4mm single glaze pane, the U value is usually higher than 4 W/m2Kc compared to the efficient values achieved by double glazing units which can be as low as 1.2 W/m2K using 2 panes of 4mm glazing.

Additionally, using only one pane of glass means that outside noise can easily be heard from inside and the glass will have a relatively weak structure. This can be somewhat overcome by using a thicker single pane in your single glazed windows where space allows and upgrading to acoustic laminated panes if noise is a concern. You can get 6.8mm, 8.8mm or 10.8mm panes to suit your needs.

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FAQs

Existing single glazing is acceptable in your property particularly if it is a listed property, but it most likely will not meet energy efficiency requirements. It does not insulate as well as double glazing to keep your home warm.

However, since April 2002 it is now a legal requirement to have double glazing when replacing your windows.

For landlords, the rules are different. Since April 2020, any rental property must now have a minimum energy performance rating of E. Single glazed windows are not very energy efficient and unless there are other robust insulation properties in place or an exemption applied, the windows should be changed to double glazing.

We can replace single panes that were secured with putty. Nowadays, we remove the putty and apply a new timber beading rather than fixing more putty.

Putty is rather difficult to remove and carries a higher risk of breaking the window frame or sash. A hard strike is often required to shift the hardened putty and can render the window unuseable if it breaks. This is why we fix new glass with wooden beading and silicone.

Replacing glass from single to double glazing depends on your existing frame. If the rebate is wide enough to allow a beading and a thicker glazed unit, then it is possible to change your glass type.

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