In the world of construction and interior finishing, CavityLite, CavityBatt Insulation for Drywalling has become a defining factor in energy efficiency, comfort, and acoustic control. Whether it’s an office, classroom, boardroom, or home, maintaining the right indoor temperature and minimizing noise transfer has become essential for modern living.
This is where CavityLite and CavityBatt Insulation by Saint-Gobain stand out. Engineered to deliver superior thermal and acoustic performance, these products are designed to reduce heat transfer between internal walls and significantly dampen sound transmission.
CavityLite is supplied in roll form, making it ideal for fast, flexible installation in partition walls and drywall systems. CavityBatt, on the other hand, comes in board or batt form, offering rigidity and dimensional stability for vertical applications where precision fitting is key.
Available in 51mm, 63mm, and 102mm thicknesses, both CavityLite, CavityBatt are manufactured using Saint-Gobain’s advanced glasswool technology — a proven insulation medium that offers long-lasting performance, fire resistance, and sustainability benefits.
CavityLite Drywall Insulation (Roll Form)
CavityLite is a lightweight glasswool roll insulation designed specifically for drywall partition applications. Its roll format makes it easy to handle, cut, and install within stud walls and ceiling voids. The flexible nature of CavityLite allows it to fill cavities evenly, eliminating gaps and ensuring consistent insulation performance.
51mm CavityLite Roll
The 51mm CavityLite is ideal for standard office and residential internal partitions where moderate acoustic control and thermal resistance are required.
- Thickness: 51mm
- Density: Approx. 11–14 kg/m³
- Thermal Conductivity (k-value): 0.040 W/m·K
- R-Value: 1.25 (approx.)
- Width: 600mm (suitable for standard drywall stud spacing)
- Length: Typically 10m per roll
Applications:
- Office partition walls and boardrooms
- Classrooms and internal school walls
- Between drywall panels in homes to reduce heat flow through walls
- General-purpose thermal and acoustic partition insulation
Benefits:
- Lightweight and flexible for quick installation
- Reduces noise transmission between rooms
- Helps maintain a stable indoor temperature year-round
- Non-combustible and safe for internal applications
- Manufactured from recycled glass for environmental sustainability
63mm CavityLite Roll
The 63mm CavityLite roll provides increased insulation performance for partitions that require enhanced sound absorption and heat retention.
- Thickness: 63mm
- Density: 14–16 kg/m³
- Thermal Conductivity: 0.039 W/m·K
- R-Value: 1.60 (approx.)
Applications:
- Internal partitions in commercial spaces such as retail stores and clinics
- Boardrooms and meeting areas requiring superior acoustic privacy
- Partitioning in malls and multi-tenant office blocks
- Ideal for use in combination with double-layer drywall systems
Benefits:
- Enhanced thermal barrier for energy-efficient indoor environments
- Excellent acoustic absorption across mid and high frequencies
- Retains shape without sagging in vertical wall cavities
- Resistant to moisture absorption and fungal growth
- Cost-effective solution for medium-density wall systems
102mm CavityLite Roll
The 102mm CavityLite is the premium-grade option in the range, engineered for high-performance internal partitions and areas where superior acoustic isolation is necessary.
- Thickness: 102mm
- Density: 16–18 kg/m³
- Thermal Conductivity: 0.038 W/m·K
- R-Value: 2.60 (approx.)
Applications:
- Large commercial office spaces requiring advanced acoustic separation
- Auditoriums, classrooms, and educational facilities
- Residential boundary walls and high-end housing partitions
- Recording studios and performance venues
Benefits:
- High R-value provides exceptional heat flow resistance
- Superior acoustic dampening between multiple rooms
- Fire-resistant and non-toxic
- Contributes to compliance with SANS energy efficiency standards
- Long-lasting and maintenance-free performance
CavityBatt Drywall Insulation (Board or Batt Form)
CavityBatt offers all the benefits of CavityLite but in a more rigid board form, providing improved handling, dimensional stability, and precise fitting within stud cavities. These batts are pre-cut to fit snugly between standard drywall or steel stud systems, minimizing air gaps and ensuring consistent thermal and acoustic performance.
51mm CavityBatt
The 51mm CavityBatt is a versatile insulation batt suitable for lightweight partitions in offices and homes.
- Thickness: 51mm
- Density: 14–16 kg/m³
- Thermal Conductivity: 0.040 W/m·K
- R-Value: 1.25 (approx.)
- Standard Board Size: 600mm x 1200mm
Applications:
- Internal drywall partitions in offices, classrooms, and residential spaces
- Between internal walls of brick homes for improved comfort
- Areas where basic acoustic control and moderate thermal insulation are needed
Benefits:
- Easy to install and trim to size
- Reduces sound transmission through walls
- Improves indoor temperature consistency
- Made from non-combustible materials
- Manufactured under ISO 9001 quality systems
63mm CavityBatt
The 63mm CavityBatt provides a balance between affordability and performance, making it the most widely used thickness for commercial and residential drywall systems.
- Thickness: 63mm
- Density: 16–18 kg/m³
- Thermal Conductivity: 0.039 W/m·K
- R-Value: 1.60 (approx.)
Applications:
- Boardrooms and meeting rooms requiring improved sound privacy
- Retail fit-outs and malls
- Educational facilities such as classrooms and lecture halls
- Apartment and townhouse partition walls
Benefits:
- Excellent acoustic control for moderate to high noise environments
- Improved thermal efficiency reduces heating and cooling costs
- Non-irritant glasswool with low dust levels
- Rigid form simplifies vertical installation
- Resistant to ageing, corrosion, and vermin
102mm CavityBatt
The 102mm CavityBatt is the top-tier option for high-density wall systems where maximum acoustic separation and insulation are required.
- Thickness: 102mm
- Density: 18–20 kg/m³
- Thermal Conductivity: 0.038 W/m·K
- R-Value: 2.60 (approx.)
Applications:
- Commercial buildings and offices with multiple meeting areas
- High-end residential walls requiring acoustic privacy
- Shopping centres and entertainment venues
- Hospitals, hotels, and recording studios
Benefits:
- High-density batt provides maximum sound absorption
- Excellent heat retention and energy-saving performance
- Non-combustible and safe in fire-rated drywall systems
- Dimensionally stable and long-lasting
- Contributes to green building credits under SANS 204 and Green Star
Key Benefits of CavityLite, CavityBatt Drywall Insulation
| Feature | Benefit |
|---|---|
| Thermal Efficiency | Reduces heat transfer through internal partitions, maintaining year-round comfort. |
| Acoustic Performance | Excellent sound absorption to reduce noise transfer between rooms. |
| Fire Safety | Non-combustible glasswool complies with fire safety standards. |
| Lightweight and Easy to Install | Suitable for fast-track commercial and residential projects. |
| Environmentally Friendly | Manufactured from up to 80% recycled glass, reducing environmental impact. |
| Durable and Long-Lasting | Resistant to ageing, moisture, and corrosion. |
| Cost-Effective | High performance with low installation and maintenance costs. |
Typical Applications Across Both Products
- Office partition walls and boardrooms
- Classrooms and school facilities
- Retail stores and shopping malls
- Between walls in residential and brick homes
- Multi-storey apartments and hotels
- Acoustic separation in cinemas, studios, and entertainment venues
About Saint-Gobain – A Legacy of Insulation Innovation
Founded in 1665, Saint-Gobain is one of the world’s oldest and most respected manufacturers of construction materials. With over 350 years of continuous innovation, Saint-Gobain has pioneered technologies in glass, gypsum, and insulation — creating sustainable solutions that improve the comfort, safety, and efficiency of buildings across the globe.
Their insulation products, including CavityLite and CavityBatt, are manufactured under strict international standards and tested for performance, durability, and safety. Saint-Gobain’s focus on research and development ensures that their insulation materials not only meet but exceed modern building performance expectations.
Operating in over 70 countries, Saint-Gobain is deeply committed to sustainability, using recycled raw materials and energy-efficient production methods. In South Africa, their insulation range has been adapted to local climatic conditions, ensuring optimal performance in both hot and cold seasons.
When you choose CavityLite or CavityBatt, you’re investing in over three centuries of engineering excellence — trusted by architects, builders, and homeowners worldwide.
Conclusion: The Smarter Choice for Modern Drywalling
For builders, contractors, and homeowners who want comfort, acoustic peace, and energy efficiency, CavityLite and CavityBatt represent the perfect insulation pairing. Whether you’re fitting out an office, designing a classroom, or soundproofing a boardroom, Saint-Gobain’s drywall insulation products provide long-term performance that you can depend on.
- CavityLite – flexible roll form for easy installation and adaptability.
- CavityBatt – rigid board form for precise fitting and professional finishes.
Both options deliver exceptional thermal and acoustic performance, helping to reduce energy costs while creating more comfortable, productive, and private spaces.
