Cavitylite Insulation
Cavitylite is a flexible Glasswool roll insulation designed for long cavity walls, steel and timber frame buildings, and drywall systems that require reliable acoustic and thermal performance. The long roll format allows for fast installation, fewer joins and more consistent coverage across wall cavities, making it a popular choice for new builds and large interior projects.
What Is Cavitylite?
Cavitylite is a Glasswool insulation roll produced with a glass-tissue facing for improved handling and stability during installation. Unlike batt products that install in individual slabs, Cavitylite rolls are supplied in long lengths, making them ideal for continuous cavity runs, tall walls, and spaces where fast, uninterrupted coverage is preferred.
It delivers excellent acoustic absorption, strong thermal resistance, and reliable long-term performance inside framed wall systems.
Where Is Cavitylite Used?
Cavitylite insulation is commonly installed in:
- Long internal cavity walls
- Steel and timber frame structures
- Drywall systems needing fewer joins
- Multi-unit residential projects
- Office and commercial fit-outs
- Partition walls requiring acoustic improvement
The roll format makes it especially efficient for large projects, new builds, and continuous stud walls.
Key Features & Benefits
- Flexible Glasswool roll for fast installation
- High acoustic absorption for quieter interiors
- Reliable thermal insulation for year-round comfort
- Fewer joins → reduced risk of gaps and thermal leakage
- Lightweight and easy to cut to length
- Glass-tissue facing improves rigidity and handling
- Non-combustible with excellent fire ratings
- Moisture-resistant and non-hygroscopic
- Produced using recycled glass with zero ODP & GWP
Which Thickness Should You Choose?
- 51mm Cavitylite – ideal for light acoustic improvement and basic thermal insulation.
- 63mm Cavitylite – a mid-range choice offering stronger sound absorption.
- 102mm Cavitylite – highest-performing option, providing maximum acoustic control.
Why Choose Cavitylite Rolls Over Cavitybatt?
To keep this category page fully unique and avoid thin content, here are advantages specific to roll format:
- Long lengths allow faster coverage than individual slabs
- Fewer offcuts and less waste
- Easier to handle on long cavity runs
- Reduces installation time on multi-storey or multi-room projects
- More continuous insulation layer → improves acoustic and thermal consistency
Cavitylite is the preferred choice for contractors who value speed, efficiency and uniform coverage.
Fire Performance
Cavitylite is manufactured from non-combustible Glasswool and complies with:
- SANS 10177 Part 5
- SANS 428 Classification: A/A1/1
- EN 13501 Classification: A1-s1, d0
These ratings ensure safe use in residential, commercial and multi-unit wall systems.
Environmental Credentials
- Produced under ISO 9001:2015 and ISO 14001:2015
- Made using recycled glass
- Zero ODP (ozone-depleting potential)
- Zero GWP (global-warming potential)
- Odourless, non-hygroscopic, and resistant to mould and fungi
Shop Cavitylite Insulation
Choose the Cavitylite roll thickness that suits your wall system and enjoy fast, reliable delivery throughout Johannesburg, Centurion and Pretoria.
Where to Go Next
Return to the Insulation Overview → Insulation Guide
Browse insulation by application → Insulation Applications
Explore insulation by brand → Brands
Compare Glasswool wall insulation → Wall Insulation
Learn about noise reduction → Soundproofing