Knauf 135mm Glasswool Insulation – 7500mm (L) x 1200mm (W)
In stock
R954,00
Knauf 135mm Earthwool Insulation is a premium glasswool product engineered for maximum thermal performance, acoustic comfort, and environmental sustainability. With an R-value of 3.38 m²·K/W, it meets and exceeds the SANS 10400-XA insulation requirements for South African homes
Knauf 135mm Insulation (Earthwool ECOSE®)
Knauf 135mm Insulation, made with ECOSE® Technology, combines excellent thermal performance and acoustic comfort with sustainability and easy handling. It’s a high-quality glasswool solution for modern South African homes.
Why Choose Knauf 135mm?
Knauf 135mm Earthwool delivers exceptional ceiling insulation performance with a manufacturer-rated R-value of 3.38 m²·K/W. When installed correctly and paired with common roofing systems, the total installed R-value can reach approximately 3.78 m²·K/W — providing reliable thermal protection throughout the year. This high level of insulation helps maintain indoor comfort while easing the load on your heating and cooling systems.
What makes Knauf stand out is its advanced ECOSE® Technology. This formaldehyde-free binder not only improves indoor air quality but also gives the thermal insulation its softer, low-itch texture — making it easier and safer to install. The product is non-combustible (Euroclass A1), environmentally responsible (80% recycled content), and designed to last for decades without sagging or degrading.
In real-world conditions, homeowners typically experience a 20–30% reduction in energy usage. That means cooler rooms in summer, warmer nights in winter, and real savings month after month — all backed by a roof insulation product that’s safer for both your home and the planet.
Product Highlights
- Provides SANS-compliant R-value for energy efficiency
- Supplied in 135 mm thickness for optimal year-round comfort
- Formaldehyde-free ECOSE® Technology for safer indoor air
- Easy to install – soft, low-dust glasswool rolls
- Made from recycled glass and plant-based binder – eco-conscious
- Fire-resistant and non-combustible (Class A1)
Knauf 135mm Technical Specifications
| Attribute | Specification |
|---|---|
| R‑Value | 3.38 m²·K/W |
| Installed R‑Value | Approx. 3.78 m²·K/W |
| Thermal Conductivity (k) | ≈ 0.040 W/m·K |
| Density | 12 kg/m³ |
| Roll Coverage | 9 m² (7500 mm × 1200 mm) |
| Fire Rating | SANS Class 1 / Euroclass A1 |
| Noise Reduction (NRC) | ~1.13 |
| Binder | ECOSE® Plant-based |
| Environmental Impact | 80% recycled content |
Knauf 135mm Benefits for Homeowners
- Superior Energy Efficiency: Helps meet SANS 10400‑XA roof insulation requirements (R ≈ 3.7) for better comfort and lower bills.
- Year-Round Comfort: Consistent indoor temperatures with less reliance on HVAC systems.
- Peace & Quiet: Excellent acoustic performance dampens outside and internal noise.
- Peace of Mind: A1 non-combustible rating for safety and compliance.
- Sustainable Choice: ECOSE® binder plus recycled glass make it eco-friendly and safe for your family.
Frequently Asked Questions
Q: How many rolls do I need?
A: Each Knauf 135mm roll covers 9 m². To estimate the quantity needed, calculate your total ceiling area and allow for some offcuts, especially around edges, downlights, and structural beams.
Q: How long does installation take?
A: Most standard homes are completed within a day. Our professional team ensures quick, clean installations with minimal disruption to your routine.
Q: Does Knauf insulation release dust or have a smell?
A: No. Knauf Earthwool uses ECOSE® Technology, which is formaldehyde-free and virtually odorless. It’s also low-dust and more comfortable to handle than traditional glasswool.
Q: Is Knauf safe for families and pets?
A: Yes. Knauf is certified non-toxic, non-carcinogenic, and is manufactured without added dyes or formaldehyde — making it safer for children, pets, and installers alike.
Q: Are other thicknesses available?
A: Yes. Knauf Earthwool is also available in 50mm and 100mm options, depending on your climate zone, ceiling type, and local building regulations.
Recommended Usage
Ideal for ceilings in homes located in strict thermal zones such as Johannesburg (Zone 1) or Cape Town (Zone 4), where high R‑value is required. Easy to install for both professional and DIY use.
