Trade double glazed sealed units
Double glazed sealed units (insulating glass units) made to the sizes you give us, for new windows and doors or to replace misted and broken units in existing frames. Choose the overall thickness, glass types, spacer and gas.
- Product code
- TG-G01
- Guide trade price
- £38 to £85 per m², ex VAT, supply only
- Lead time
- The manufacturing time for double glazed sealed units depends on the specification, and the date is confirmed on your order acknowledgement.
- Delivery
- UK-wide to site, yard or unit, priced on your quote
- Category
- Sealed units and glass
Typical layout. W and H are the frame or glass sizes you give us.
What is in the specification?
- Made to size in common thicknesses such as 24mm and 28mm
- Low-E coated inner pane and argon gas fill
- Aluminium or warm-edge spacer bars
- Toughened, laminated, obscure and acoustic glass options
- Georgian bars between the panes
- Spacer colours to match frames
- Manufactured to BS EN 1279
Options you can add
- Warm-edge spacer
- Toughened or laminated panes
- Obscure patterns
- Self-cleaning outer pane
- Solar-control glass
- Internal Georgian bars
Who orders trade double glazed sealed units?
Mostly glaziers and glass merchants, window and door installers, property maintenance companies and landlords and property managers. Typical uses include replacing misted or broken units; glazing new frames on site; upgrading glass in existing windows.
Sealed units are made to the exact glass size, so the measurement is the size of the unit itself. When replacing a misted unit, measure the old unit once the beads are off.
Overall thickness has to match the frame rebate. A 28mm unit will not go into a frame glazed for 24mm, so check before you order.
Glass in critical locations, such as doors, side panels and low-level glazing, must break safely, be robust or be protected; in practice that usually means toughened or laminated glass. Mark those units on your schedule.
Toughened panes in a unit carry a permanent BS EN 12150 mark. Ask if you need units labelled by window number so the installer can match each unit to its frame.
How should you measure?
Measure the glass, not the frame: remove the beads and measure the existing unit, or measure the rebate and deduct the glazing clearance. Give width first, then height, and the overall unit thickness.
Which building regulations apply?
Under Approved Document K, glazing in critical locations (doors, and side panels within 300mm of a door, up to 1500mm above floor level; other glazing below 800mm) must break safely, be robust or in small panes, or be permanently protected. Toughened and laminated safety glass are classified to BS EN 12600. Replacing only the glass in an existing frame is generally treated as a repair rather than notifiable work.
Wales
In Wales, safety glazing in critical locations, such as doors, side panels and low-level glazing, is covered by Approved Document N. Safety glass is classified to BS EN 12600. Replacing glass alone in an existing frame is generally treated as a repair.
Scotland
In Scotland, glazing in areas where people could collide with it must follow the safety glazing standard in Section 4 of the Technical Handbooks. Safety glass is classified to BS EN 12600.
Northern Ireland
In Northern Ireland, glazing safety in critical locations is covered by Technical Booklet V. Safety glass is classified to BS EN 12600.
More detail: Approved Document L guide safety glazing guide. Your installer or designer remains responsible for compliance and any notification.
How ordering works
Send your schedule
Sizes, quantities and options for each item, by form, email or photo.
Get an itemised quote
Every line priced separately, with delivery shown.
Approve the acknowledgement
Sizes, finishes and handing confirmed in writing.
Take delivery
To your site, yard or unit, booked for the date confirmed with you.
Questions trade customers ask
How do I measure a sealed unit?
Measure the glass itself, width then height, with the beads removed. Also measure the overall thickness.
Can you make units to match my existing windows?
Yes. Give us the size, thickness, glass type and spacer colour of the units you are replacing.
Why is my sealed unit misted?
The edge seal has failed and moisture has got between the panes. The unit needs replacing; the frame can usually stay.
Do you supply toughened units?
Yes. Specify toughened or laminated for any unit in a critical location such as a door or low-level pane.
Trade double glazed sealed units by area
Area pages cover delivery and the regulations that apply where the job is.