Energy SavingJune 10, 2018by Solar ShieldDouble Glazed Windows

Double glazed windows in South Africa are becoming quite popular among homeowners. People want to be more energy efficient and live in a more comfortable home. The new trend in this window sector is double glazing.

There are two separate pieces of glass in every window that has been double glazed. These are kept aside from one another by using a perimeter space bar. The space between the two pieces of glass is designed to reduce heat coming through. As a matter of fact, it makes the window much stronger and safer from a security point of view.

The whole unit is then closed tight so that no air or moisture can pass. The principle behind this design is to keep the minimum space among the glass pieces to ensure improved insulation, noise reduction and security.

Benefits of Double Glazed Windows

  1. Acoustic insulation
  2. Added security
  3. Reducing condensation
  4. Draught-proofing

Soundproof Windows With Double Glazing

Wondering how to soundproof windows?

double glazed windows

STC rating is the standard for residential sound transmission.

There are many factors that influence the rating score of windows. Some of the factors are:

  • Glass thickness
  • Spacing between glass

So if the noise reduction/window soundproofing is the sole purpose of your new windows, asymmetric double glazed windows in Johannesburg is the right product to use.

Double glazing increases the STC rating of the glass. Glasses with different thicknesses are used for asymmetric double glazing.

For a significant amount of sound/noise reduction through windows, use laminated acoustic glass (Laminated material is used to bond two or more glasses). This is how to soundproof windows.

Double Glazed Window Insulation

Obtaining energy efficiency is usually the main reason for using double glazing in Cape Town. These windows maintain cool and uniform temperature inside. You do not have to use the conditioner all day. Around 20 to 30 per cent of heating and cooling bills can be reduced by using better-insulated windows. Double glazed windows are cost effective and save you money over time. Also, these better-insulated windows can make your living space a more comfortable one.

The manufacturers of double glazed windows are very confident about their product. They declare that the double glazed windows in Johannesburg are 25 per cent more efficient than average windows. There are some important things to look for when buying new windows.

Double Glazed Windows U- factors and R- Values

There are U- factors and R- Values. This measures the windows ability to prevent heat from entering through.  According to The National Fenestration Rating Council, the U-factor gives a better understanding of the heat transmission than R-Values do.  Lower U-factor values mean these windows are better at keeping heat inside or outside.

Another factor named Solar Heat Gain Coefficient (SHGC) is used to measure the amount of heat from direct sunlight that is blocked by windows. A lower number indicates better heat blocking.

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Cost of Double Glazed Windows in South Africa

When installing new windows, people mostly think about the double glazed windows price. These windows are more expensive than single pane windows. For an average sized window, you will have to pay a lot more for the double glazed version. The upfront cost of double glazed windows, can save 3% of the yearly heating bills. Also, it will make your living space much more comfortable.

You should also consider getting a quote for isotherm ceiling insulation. Roof insulation also has a huge impact on heating a cooling bills. The cost of double glazed windows in Johannesburg anf ceiling insulation will pay itself off very quickly.

Natural Light With Double Glazing

Providing natural light is one of the main functions of the windows. For reducing the amount of solar heat gain through the window, Low_E coatings are now included in the inner part of the window. These coatings block the infrared radiation of the solar rays and reduce the heat gain.

The manufacturers also insist that Low_E coatings are designed in a way that maximizes the transmission of visible light through the window while blocking the heat producing rays. Some people disagree with their claims. They believe Low_E coatings in double glazed windows darken the room.

Different rooms need different coating according to their exposure to the sun. However, different coatings are of different colors. So it is better not to use two different coated windows side by side. The difference might be easily noticeable.

The Importance of Window Framing

For windows, the frame is an important part. You must have considered the cost of frames. Vinyl framed window is the cheapest among the double glazed window framing. The colours are limited. They do well in terms of insulating and durability. However, these are a bit bulky and do not look as good. Moreover, these usually come with limited lifetime warranty and also the cost of maintenance is the lowest.

Fibreglass frames are another good option when framing windows. The durability of these are remarkable and they last a lifetime. Also, maintenance requires very little effort and they good looking when compared to vinyl frames.

One drawback is that these are expensive and could cost you 50% per cent more than vinyl frames.  Another main benefit of fibreglass frames is these are paintable. You can colour them up according to your wish. Also, there are different standard shades are available to choose from.

Wood frame and double glazed windows are the most expensive combination. If you are looking for a traditional look, this combination is the best. But you have to be very careful with this because this requires regular window frame maintenance.

Double Glazed Windows DIY Installation

For DIY installation, you have to do some extra work. Double glazed windows are more difficult to install when compared with single glazed windows. They are heavier and wider. It is not easy to install them because they are significantly heavier. The width of the frames is also a problem. It is not easy handling these and generally, professionals are needed for the installation. Some re-modelling works might be necessary in some cases.

Safety and Security with Double Glazing

Beside all other functions, double glazed windows also increase the protection of the house. Additional strength is added in the windows with double glazed panes installed. It creates a much harder window to break for intruders.