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What is Thermal Break? 

Bradnam’s thermal break products are expertly designed to ensure the utmost resistance to heat transfer – using reinforced polyamide extrusions and double glazing with warm edge spacers as barriers to thermal conduction. This advanced technology effectively minimises heat and cold exchange through the windows and door frames, keeping the home cooler in summer, and warm in winter.  

The most energy efficient solution available, Bradnam’s thermal break range ensures year-round comfort, reduced energy costs, and exceptional insulation performance. Whether you’re designing for a modern home or a high-performance commercial space, Bradnam’s thermal break systems deliver cutting-edge designs that don’t compromise on thermal performance. 

Why choose Thermal Break? 

Protecting the home from extreme temperatures, Bradnam’s thermal break windows and doors deliver superior insulation and energy efficiency, creating a more comfortable indoor environment while reducing reliance on artificial heating and cooling. Designed for sustainability and performance, they help lower energy costs and contribute to a smaller carbon footprint. 

  • Protection from extreme temperatures

    Provides additional insulation – keeping the house cooler in summer and warmer in winter

  • Less condensation

    Reduce the incidence of condensation on windows and doors

  • Performance without sacrificing style

    Available in many types of windows and doors

  • Lower electricity bills

    Can reduce energy costs by up to 27% compared to ordinary windows and doors

    Subject to conditions

  • Operate with ease

    Ergonomic design and high-quality components ensure effortless operation

    Sliding door shown

  • My husband and I cannot fault the service we received from design studio consultant Megan at the Central Coast showroom. She was so friendly throughout our initial emails, and couldn’t be more informative when I visited the showroom itself. I had been gathering multiple quotes from other local window suppliers and Megan really stood out from the rest.

    Lauren Montague

    June 2025

  • The service from the Lambton store has been prefect. Lee-Anne in sales is always quick to respond with pricing and ordering and will always find the information I need to help me with my customers requests. Many thanks Lake Macquarie Windows and Doors

    Tim G

    June 2025

  • She is a genuine asset to the Bradnam’s team — professional, efficient, and committed to excellence. In our view, she’s worth her weight in gold. Thank you, Bianca, for your remarkable service. We look forward to working with you again.

    Fast Glass

    June 2025

  • Several weeks ago, Kelly from sales, contacted me and stated that it looked like we had paid twice for the cost of the windows and doors. When checking the bank account, this is what actually happened. In short, after submitting the required evidence, a prompt payment occurred for the total amount and we are extremely grateful for Bradnam’s honesty.

    Lyn McGoldrick

    June 2025

  • Big thanks to Glen from Bradnam’s. Glen arrived at our home to provide a service check his knowledge and experience was evident as he went about his job. My wife and I were very happy with Glen. Keep up the great service.

    Joe C

    June 2025

  • We recently had our casement windows replaced with aluminium louvre windows from Bradnams in Townsville, and we couldn’t be happier with the result! The staff was incredibly friendly and helpful throughout the process, from initial consultation to installation. The new louvre windows not only look fantastic but also keep our home so much cooler. Highly recommend Bradnams Townsville for anyone looking to upgrade their windows!”

    Dee

    June 2025

  • Very helpful and knowledgeable. Solve the issue I had with no drama whatsoever. Definitely recommend.

    Col P

    June 2025

  • I recently had the pleasure of dealing with Mira, who promptly actioned my request and followed up every step of the way. Exceptional customer service!!! Thanks so much!

    Melanie

    June 2025

  • We had a problem with a sliding door lock. The serviceman Peter was able to diagnose the various issues involved and progressively remedy them. We were impressed with his knowledge and forensic dedication.

    Peter and Bronwyn

    June 2025

High-performance Thermal Break 

When selecting energy-efficient windows and doors, two key factors matter most – U-value, and design. A lower U-value means stronger insulation and resistance to heat transfer, while a design that’s configured for optimised thermal performance enhances comfort and efficiency – reducing energy use and lowering electricity costs year-round. 

ProductsU-value
Essential fixed window TB 52mm1.5
Essential awning window TB 52mm2.0
Signature sliding window TB 100mm2.3
Signature sliding door 100mm1.9
Signature hinged door TB 100mm1.9

To view more energy ratings for our windows and door, click on one of the links below. 

Wide range of Thermal Break products

Windows

  • Awning
  • Bi-fold
  • Fixed
  • Sliding

Doors

  • French
  • Sliding

Performance without compromising style 

Bradnam’s Thermal Break Range proves that exceptional thermal performance doesn’t come at the cost of style. With sleek, streamlined profiles that integrate effortlessly into any design, it maintains architectural symmetry with other Bradnam’s windows and doors while enhancing comfort and efficiency – showing that energy-smart windows and doors can be as visually appealing as they are functional. 

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