Why 135mm Aerolite Ceiling Insulation Remains South Africa’s Most Popular Choice
In South Africa’s varied climate conditions, ceiling insulation plays a critical role in maintaining comfortable indoor temperatures and lowering electricity costs. 135mm Aerolite Ceiling Insulation has earned its reputation as the go-to solution for homeowners and builders nationwide. As the thickest option in the Aerolite range, it provides a high R-value of 3.38, helping homes stay significantly cooler in summer and warmer in winter.
The “Soft Touch” technology makes installation more comfortable compared to older generation glasswool products. With a density of 11 kg/m³ and excellent resilience, 135mm Aerolite Ceiling Insulation maintains its performance for decades without settling or sagging. It is SABS approved and fully compliant with SANS 10400-XA energy efficiency regulations, making it suitable for all major climate zones in South Africa. Homeowners in Gauteng, the Western Cape and KwaZulu-Natal consistently choose Aerolite for its proven track record, affordability and reliable results.
Outstanding Thermal Efficiency – Energy Savings with 135mm Aerolite Ceiling Insulation
The 135mm Aerolite Ceiling Insulation delivers a laboratory R-value of 3.38 m²·K/W and an installed R-value of approximately 3.78 once properly fitted. This level of thermal resistance effectively reduces heat flow through the roof, which can account for up to 45% of unwanted heat gain or loss in a typical home.
With a thermal conductivity (K-value) of 0.040 W/m·K and resulting U-value of around 0.296 W/m²·K, this insulation performs exceptionally well in both hot and cold conditions. Homeowners in Johannesburg, Pretoria, and other inland areas particularly benefit from its ability to meet or exceed the strict SANS 10400-XA requirements. Many users report noticeable reductions in air-conditioning and heating usage, often cutting energy bills by 30-40%. The product also features good vapour resistance (5 MN·s/g·m), helping prevent condensation issues in humid regions like Durban and coastal areas.
Powerful Acoustic Performance – Quieter Homes with 135mm Aerolite Ceiling Insulation
135mm Aerolite Ceiling Insulation provides a Noise Reduction Coefficient (NRC) of 1.10, meaning it absorbs a very high percentage of sound waves. This makes it highly effective at reducing noise from rain on the roof, traffic, aircraft, and impact sounds from upper levels in double-storey homes.
The dense glasswool structure traps sound energy efficiently, turning noisy environments into peaceful living spaces. Families often comment on how much quieter their homes feel after installation, especially during thunderstorms or when children are playing upstairs. Combined with its thermal benefits, this acoustic performance adds tremendous value to any residential property.
Superior Fire Safety – A1 Non-Combustible Protection
Like all quality glasswool products, 135mm Aerolite Ceiling Insulation carries the highest Euroclass A1 fire rating and is classified as non-combustible under SANS standards. It does not spread flames, produces minimal smoke, and creates no burning droplets, significantly improving fire safety in your home. Fully compliant with SANS 10177-5, it gives builders and homeowners complete peace of mind.
Key Benefits of Installing 135mm Aerolite Ceiling Insulation
- Excellent Energy Savings: Can reduce heating and cooling costs by up to 40%
- Year-Round Comfort: Keeps homes cooler in summer and warmer in winter
- Effective Soundproofing: NRC 1.10 delivers impressive noise reduction
- Soft Touch Technology: Less itchy and more comfortable to handle during installation
- Top Fire Safety: A1 non-combustible rating for peace of mind
- SANS Compliant: Fully meets South African building regulations (SANS 10400-XA)
- Easy Installation: Lightweight, flexible rolls with 6m² coverage per roll
- Long-lasting Durability: Maintains thickness and performance for over 50 years
- Eco-Friendly: Made with up to 80% recycled glass and low environmental impact
- Great Value: Trusted by thousands of South African homeowners and builders
These benefits make 135mm Aerolite Ceiling Insulation one of the smartest investments for any South African home.
Ceiling Insulation R-value For All Regions in South Africa
Detailed Specifications Grid – 135mm Aerolite Ceiling Insulation
| Specification | Details |
|---|---|
| Thickness | 135 mm |
| R-Value (Declared) | 3.38 m²·K/W |
| Installed R-Value | ≈ 3.78 m²·K/W |
| Roll Dimensions | 5 m × 1.2 m |
| Coverage per Roll | 6 m² |
| Density | 11 kg/m³ |
| Thermal Conductivity (K-Value) | 0.040 W/m·K |
| U-Value | ≈ 0.296 W/m²·K |
| Noise Reduction Coefficient (NRC) | 1.10 |
| Fire Rating | Euroclass A1 (Non-combustible) |
| Material | Soft Touch Glasswool |
| Vapour Resistance | 5 MN·s/g·m |
| SANS Compliant | Yes (SANS 10400-XA & SABS Approved) |
Simple & Fast Installation Guide for 135mm Aerolite Ceiling Insulation
135mm Aerolite Ceiling Insulation is designed for fast and easy installation. The lightweight rolls are flexible and can be cut to fit perfectly between roof trusses or over brandering. Most professional installers complete an average home in just a few hours. DIY enthusiasts also love how manageable the Soft Touch fibres are – simply unroll, fit snugly without compression, and enjoy immediate results. Protective clothing is still recommended, but the reduced itch makes the job far more pleasant than traditional glasswool.
135mm Aerolite Ceiling Insulation vs 135mm Knauf Ceiling Insulation – Honest Comparison
Many homeowners compare 135mm Aerolite Ceiling Insulation directly with 135mm Knauf Ceiling Insulation before making their final choice. Both are premium glasswool options, but each has strengths that suit different needs.
Thermal Performance Comparison
Both products deliver the same declared R-value of 3.38 and very similar installed performance around R3.78, making them equally effective for energy efficiency and SANS compliance.
Acoustic Performance Comparison
135mm Knauf offers a slightly higher NRC of 1.13 compared to Aerolite’s 1.10, thanks to its marginally higher density.
Roll Size & Coverage
Aerolite provides 6m² per roll while Knauf offers larger 9m² rolls. Knauf may be faster to install on very large ceilings.
Density and Handling
Knauf has a density of 12 kg/m³ versus Aerolite’s 11 kg/m³. Aerolite’s Soft Touch formula is often praised for being very comfortable to work with.
Fire Safety and Eco Features
Both carry identical A1 non-combustible ratings. Knauf features ECOSE® binder (formaldehyde-free), while Aerolite excels with its proven Soft Touch technology and widespread availability.
Which Should You Choose?
135mm Aerolite Ceiling Insulation remains the most popular choice for excellent performance at a competitive price, while Knauf appeals to those wanting slightly higher density and larger rolls. Both are outstanding products that deliver real results.
Eco-Friendly Qualities of 135mm Aerolite Ceiling Insulation
Aerolite is manufactured using a high percentage of recycled glass and has zero ozone-depleting potential. It is an environmentally responsible choice that helps reduce your home’s carbon footprint through major energy savings. The product’s long lifespan also means fewer replacements and less waste over time.
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