Why Retrovive is the future of sustainable underfloor insulation
- Tom Collings
- Apr 26
- 2 min read
When it comes to insulating our homes and buildings, sustainability and performance are more important than ever. That’s where our cellulose fibre insulation stands out — setting a new standard for eco-friendly, high-performance insulation.
Certified Sustainable
Our insulation material, Warmcel®, has been awarded the prestigious NaturePlus® certificate, confirming it as one of the most sustainable insulation options available today. It’s actually carbon-negative, meaning it locks away more carbon than is released during its manufacture. Simply put: the more Warmcel is used, the more carbon we remove from the atmosphere. With a lifespan of at least 50 years — and the ability to be fully recycled at the end of its use — Warmcel leads the way in circular economy principles.
Better Thermal Performance
Warmcel’s installed density is around 50 kg/m³, compared to fibreglass insulation at just 10 kg/m³. That greater thermal mass means it holds onto heat far more effectively. On a cold morning, buildings insulated with Warmcel will have stayed a degree or two warmer overnight, helping to cut energy use and heating bills.
Superior Draught-Proofing
The Retrovive installation method — blowing loose cellulose fibre under pressure — ensures that every gap, no matter how small or awkward, is tightly packed. This approach prevents draughts and minimises heat loss. In contrast, traditional fibreglass and foam insulations are difficult to fit perfectly and tend to shrink over time, creating gaps and leaky cold spots.
The Retrovive system goes even further with a belt-and-braces approach: Warmcel’s natural density blocks draughts, while a breathable membrane holds the insulation securely in place, adding an extra layer of protection.
Stays Strong Against Wind Washing
Lightweight, open-textured materials like fibreglass struggle against a phenomenon known as wind washing — where moving air beneath the insulation draws warmth out of the building fabric. Warmcel’s higher density and tighter structure resist wind washing, maintaining thermal performance when you need it most.
In short: Warmcel isn't just another insulation material — it's a smarter, greener, and longer-lasting solution that keeps homes warmer and the planet cooler.
To find out more, and discuss your project, contact our expert team today.
