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Tempered & safety glass4–8 mm

Window Double Glazing: Free Quotes from Local Glaziers

Thinking about window double glazing? Get free quotes from independent South African glaziers and window suppliers. No fee and no obligation to accept.

  • Quotes fromdouble glazing installers
  • Areaall nine provinces
  • Cost to youfree

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A glazier lifting a sealed double glazed unit into an aluminium window frame on the side of a house
A glazier lifting a sealed double glazed unit into an aluminium window frame on the side of a house

Get a free glass quote

Tell us what you need and where. A glass supplier or glazier who works in your area quotes you directly.

Request no.CL-93377

Cutting list (optional)

Know the sizes? List each pane in millimetres. Toughened glass can't be cut afterwards, so sizes help the glazier quote, but they will still measure up before ordering.

#Width (mm)Height (mm)Qty
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2××
3××
0 m²no panes yet
Thickness, if you know it
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Free and no obligation. By sending you agree that we may share your request with a suitable supplier or glazier. See our privacy policy.

Window double glazing uses two panes of glass with a sealed gap between them, which cuts heat loss in winter and heat gain in summer. TemperedGlass.co.za is a free quote service. You fill in one form and we pass your request to independent glaziers and window suppliers in your area, who quote you directly. We do not make or install double glazing ourselves. There is no fee and no obligation, and you can compare quotes for new frames, retrofit and different glass types before you decide.

How double glazing works

A double glazed unit, also called an insulated glass unit, has two panes separated by a spacer, with the edges sealed. The gap holds air or an inert gas and slows the flow of heat. It also reduces noise and condensation on cold mornings, and it can limit fading of curtains and floors.

  • Low-E coating: a thin layer that reflects heat back into the room.
  • Solar control glass: cuts strong sun and glare.
  • Laminated or toughened panes: add safety or security.

New frames or retrofit

Double glazing is usually fitted in aluminium or uPVC frames. Many standard aluminium frames are too shallow for a sealed unit, so retrofit double glazing for aluminium windows often means new frames or new sashes. Some systems keep your existing frame. Ask the supplier what your windows can take, and whether the work can be done room by room.

On the Highveld, double glazing makes cold winters easier. At the coast, it helps with noise and wind, and frames and fittings should resist salt air. Ask the supplier which spacer and sealant they use.

What to check before you order

Double glazed units are made to size, so there is usually a lead time. Measure after the supplier has checked your frames.

  • Safety glass: ask your glazier to confirm what the regulations require for your opening.
  • Sun-facing panes: large panes in full sun can crack from heat, so ask about glass type.
  • Body corporate: external changes may need approval.
  • Seal life: ask the supplier about the unit seal and any cover.
  • Ventilation: a sealed home still needs openable windows or vents.

What affects your quote

We never give prices here. Suppliers prefer to quote for your actual windows. They will look at:

  • The number and size of windows or doors.
  • New frames or fitting into existing ones.
  • Type of glass: Low-E, solar control, laminated or toughened.
  • Frame material and finish.
  • Delivery distance, access and floor height.

Odd shapes, arched windows and very large panes cost more to make. A list of window sizes and a few photos help you get quotes you can compare.

Comparing quotes for double glazing

The lowest figure is not always the best deal. When your quotes arrive, check:

  • Glass: the type, thickness and finish allowed for, and that it carries the safety mark where it must.
  • Hardware: the hinges, clamps, channels, spigots or frames included, and their finish and grade.
  • Measuring and lead time: who measures, how long the toughened glass takes to arrive, and when it can be fitted.
  • Guarantee and terms: any workmanship guarantee, deposit, payment stages, removal of old glass and how long the price holds.

What to include in your request

  • List the width and height of each window.
  • Say if the frames are aluminium, steel or wood.
  • State whether you want new frames or retrofit.
  • Mention your main aim: warmth, noise or security.
  • Give your suburb and the floor level.

Frequently asked questions

Does TemperedGlass.co.za install double glazing?
No. We are a free quote service. We pass your request to independent glaziers near you, and they quote you directly. No fee, no obligation.
Can my existing aluminium windows be double glazed?
Sometimes. Many frames are too shallow, so new frames or sashes may be needed. A glazier can check on site.
Does double glazing reduce noise?
Yes, it usually helps. Laminated glass or a wider gap between the panes can improve the result.
Is it worth it in a warm area?
It can be, mostly for heat and glare. Ask about Low-E and solar control glass for sun-facing rooms.

Double Glazing by province

Double Glazing by city and town

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