Your online home of Double Glazed Windows and Doors…

Transform your home and live a better life with Westech by Certainteed double glazed windows & doors

Our impressive uPVC framed double glazed Windows and Doors will:

  • Save 50% or more of heat gain or loss through your windows
  • Block outside noise by up to 80%
  • Increase your security
  • Never need painting

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    Noise Reduction

    Block noise through windows by up to 80%. If we can’t guarantee at least 50% noise reduction through the window, we won’t bother!

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    Thermal Comfort

    Keeping you warmer in winter and cooler in summer. An effectively insulated building envelope, designed to reduce heat transfer, is at the heart of thermal efficiency.

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    Energy Efficiency

    The energy efficiency of Westech by Certainteed double glazed windows helps reduce home energy consumption by 50 to 80%. Greenhouse gas emissions drop along with your power bills.

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    Low Maintenance

    Very little maintenance is needed with rigid uPVC framed windows and doors. Over its lifetime, rigid PVC has a good ecological balance when compared with timber that requires regular repainting.

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    Colours & Finishes

    Choose from our ranges. Westech by Certainteed’s timeless solid colours or the EnergyWise range of woodgrain and contemporary finishes

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    With nearly 30 years of experience fitting uPVC framed windows and doors to classic and contemporary homes, and commercial properties, we’re confident we have the product you need.


Featured Articles
We owe you and Westech by Certainteed our thanks. The windows are truly beautiful and have transformed our house. Thank you for all the recommendations, they proved to be the right thing to do.
Windows are great, beyond my expectations. Would not know we are on a main road from that bedroom. You were professional, punctual and the job was done without a hitch.
Your windows have stood up well on our direct beachfront home, where they been heavily exposed. Thank you for this great product and after sales service.
Just fantastic! They look good and are everything and more then we ever thought they would be.
The key to our house is your windows - when it was 40° outside a couple of weeks ago our house was a maximum of 25° - our friends thought we had installed air-conditioning.
Last summer when the temperature was 40° outside the maximum inside was 27° and when it's cold and chilly outside like minus 5° it's 15° inside without heating.
They are brilliant windows.
The Double Glazing is most successful and we are both sleeping so much better.
Just a note to say thankyou for your unrivalled after sales service, the job was done in a very professional way. Yours is a firm that will carry my highest recommendation. Thankyou again.
I use a quarter of the firewood that my next door neighbour does, to have an even temperature throughout my house ..... You have to live with these windows to fully appreciated them.

Some home owners travel interstate for our free seminars. They are worth it


Westech by Certainteed protects your home with Double Glazed uPVC Framed Windows and Doors

Trust your investment in comfort and value for your home to Australia’s leader in energy efficient, double glazed windows and doors.


Today we are proud to be the only supplier of the leading window and door systems from North America, ranging from the biggest to the best.

Select from dozens of styles, colours and finishes to suit your home, then ask our advisers to customize your glazing for maximum effect. We will tailor every window in every room for peak performance, whether for energy efficiency, thermal comfort, ventilation or noise reduction.

Our extensive product range includes: leadlight and stained glass, bay windows, double glazing windows, frameless corners, colonial or federation bars, skylights, pet doors, internal venetians, extractor fans, automated winders and more.

If you are renovating your Melbourne home, make it energy efficient with Westech by Certainteed.

Our services cover full installation, re-sizing openings and removal of old windows. Our warranty exceeds the industry standard.

We also believe that you should be fully informed before making your investment, so in addition to a Free Assessment and advisory of your home or house plans.  You may even be surprised to learn that solar panels are not high on industry experts’ lists.

As a leader in our field we are proud to be a member supporting the following associations:

Learn more on the following pages, call to get free advice or come in and see Australia’s largest range in our award-winning showroom.