In early 2025 Sealasash completed a large retrofit double glazing Melbourne project a stunning cedar house in Shoreham upgraded with 8.1mm Toughened Vacuum Glass.
The numbers speak for themselves:
- 52m² of glass retrofitted
- 67 panes upgraded
- Original 4mm single glass replaced with advanced Panasonic Glavenir Vacuum Glass
The transformation was immediate. Once draughty and poorly insulated, the home is now a warm, quiet, and comfortable haven without compromising its timber character.

Why Retrofit Double Glazing Matters for Melbourne Homes
Many homes across Melbourne and coastal Victoria still rely on outdated 4mm single glass, which means:
- Heat loss in winter – Understand how window performance effects heat loss here.
- Overheating in summer – Find out about how solar heat gain works here.
- High energy bills – Consider why your energy bill is so high here.
- Noise intrusion from outside – Find out how it performs for noise here.
What often gets overlooked is draught sealing. Many operators jump straight to glass upgrades, but sealing the windows properly is the foundation of comfort. It’s where Sealasash began our journey, and it’s what sets us apart from anyone else offering retrofit double glazing in Melbourne. Without it, even the best glass won’t perform at its peak. We explain this further in our Simple Stuff Works article & it’s all backed up by Historic England!
By retrofitting Glavenir Vacuum Glass by Panasonic, Sealasash delivered the benefits of double and even triple glazing performance in a slimline design that fits perfectly into the home’s existing windows.






No Job Too Far from the CBD
Although this cedar house sits in Shoreham, well beyond Melbourne’s CBD and our warehouse in Thornbury, our approach is simple: no location is too far when it comes to bringing the benefits of retrofit double glazing to distant for Melbourne homeowners.
With the upgrade complete, the result is a light-filled, insulated home that blends timber charm with cutting-edge vacuum glass performance.
For anyone considering an upgrade, retrofit double glazing & draught sealing by Sealasash is one of the smartest ways to create lasting comfort without compromising on style.