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Expert Double Glazed Windows & Doors in Western Australia
Heatseal Double Glazing Double Glazing has established itself as a leader in the window and door manufacturing industry, boasting over four decades of expertise in the UPVC double glazing sector. Originally rooted in the United Kingdom, our team transitioned their extensive knowledge to Western Australia, where we have grown into one of the region's most trusted providers of energy-efficient solutions. Our commitment to quality is evident in our locally manufactured products, which combine superior thermal performance, noise reduction, and enhanced security tailored to Australia's unique climate conditions.

As an Australian Window Association and Housing Industry Association member, we maintain rigorous quality standards while supporting local communities through initiatives like Orange Sky. Our recognition through the South West Small Business Awards underscores our dedication to excellence in both product innovation and customer service.
Services
Double Glazed Windows Double Glazed Doors Cavity Wall Insulation Window Repairs Door Replacements
Highlights and features
  • Over 40 years of experience in the window industry
  • Award-winning commitment to quality and standards
  • Proven customer satisfaction through testimonials
  • Locally manufactured products supporting the community
  • Environmental sustainability initiatives in operations
Associations and certifications
  • Australian Window Association (AWA)
  • Housing Industry Association (HIA)
  • Australian Standards
What people say
Remarkably lower temperatures Exceptional service Outstanding professionalism Noise reduction Transformed living space
Services
Double Glazed Windows
Our double-glazed windows combine two panes of glass with an insulating air gap to deliver superior thermal efficiency and noise reduction. Designed specifically for Australian climates, these windows maintain comfortable indoor temperatures while reducing energy costs. Each unit meets Australian Standards for durability and bushfire resistance, making them ideal for both new constructions and renovations across Western Australia.
Double Glazed Doors
Heatseal Double Glazing Double Glazing's double-glazed doors offer enhanced security features with multi-point locking systems and steel reinforcement while maintaining energy efficiency. These doors provide excellent insulation against heat and cold, reducing energy consumption. Available in sliding, entrance, French, and stacker styles, they suit various architectural designs and functional requirements for residential and commercial properties.
Cavity Wall Insulation
Using ROCKWOOL cavity wall insulation made from volcanic rock, we deliver fire-resistant thermal and acoustic insulation solutions for new and existing homes. This sustainable product retains up to 85% of indoor warmth or coolness, significantly lowering energy bills. Professionally installed by trained technicians, it offers a durable, eco-friendly solution that improves year-round comfort in Western Australian homes.
Window Repairs
We provide comprehensive repair and replacement services for glazing, aluminium, and UPVC windows, including security screens and shower screens. Our skilled technicians handle re-glazing, flyscreen maintenance, and mirror installations while adhering to strict quality standards. This service extends the lifespan of existing window systems while maintaining energy efficiency and aesthetic appeal.
Door Replacements
Our door replacement service covers security screen installations, pet door additions, and complete door system upgrades. We supply and install custom solutions that enhance home security while improving thermal performance. With options for adjustable hinges and bespoke glazing, our replacements ensure seamless integration with existing structures while meeting Australian safety requirements.
Questions
What areas does Heatseal Double Glazing Double Glazing service?
We serve Western Australia including Bunbury, Perth, Albany, and surrounding regions.
Do you offer double glazing for commercial properties?
Yes, we provide solutions for both residential and commercial buildings.
Are your products Australian Standards approved?
All our windows and doors meet current Australian Standards requirements.
Can you repair existing windows?
We offer comprehensive repair services for glazing, aluminium, and UPVC windows.
Is financing available for installations?
Yes, we offer financing options to support your home improvement projects.
Do you provide insulation services?
We install ROCKWOOL cavity wall insulation for improved thermal performance.
Videos
Reviews (6)
Dianne Ernst
Sep 27, 2021 Report
We had every window replaced in our house. Paul and his team delivered a top quality product which has enhanced our house and has met all our expectations with insulation and noise reduction. The professionalism from beginning to end was second to none. The product was installed ahead of schedule and we are so glad we supported local business and were rewarded accordingly. Highly recommend Heatseal Bunbury.
JCRidesAgain
Mar 05, 2021 Report
After years of leaking windows and damaged timber floors we called Paul at Heatseal.. the results were superb. Looks fantastic, No leaks, no noise and 5 degrees cooler in the summer.
Deanne C.
Aug 31, 2020 Report
From our initial enquiry right through to the installation of our double glazed windows, the advice and service we've received from Paul and his team has been fantastic. Our house is by the beach and is fully exposed to the harshest elements, so extra consideration has been given to the safety rating of the glass and frames. The windows are of the highest quality, with a very impressive locking system, and they have been fitted to perfection. We have no hesitation in recommending Heatseal for quality windows and doors. Their product and their service is top rate.
Sam Deed
Oct 26, 2018 Report
The guys from Heatseal did an amazing job to replace our old west facing windows and a door. The job was massive undertaking and was completed in a day with the guys cleaning up as they went along. By the time they had finished, we had great new windows and everything was immaculately clean. We added a tint to our windows and it looks terrific. I can highly recommend Heatseal, we are planning on getting more windows replaced and we are going to call them back again.
Andy Stewart
Aug 13, 2017 Report
Can't praise the Heatseal enough. Andy was our the first point of contact, he was very professional, honest and not pushy. The installers, Steve and Jackson, arrived at 7am as arranged had a coffee then worked non stop until the job was done. No mess, hoovered inside swept up outside and left. If anyone is looking at double glazing I would recommend Heatseal as your first port of call. The windows lived up to our expectations, just like the UK.
Adrian Cooper
Aug 05, 2015 Report
WOW! I would like to take the opportunity to thank all the team at Heatseal Double Glazing. The level of service and communication throughout the whole process right from measuring, quoting and fitting our new double glazed windows and doors throughout our home have been fantastic. We have had bad experiences with tradespeople over the years but I can truly say Heatseal's workmanship and service is exceptional.
Heatseal's visited our home at a time to suit our busy working schedule. He took the time to explain all the fine details ensuring we had the correct style, colour and designed windows