Knauf Insulation – Trusted Thermal & Acoustic Performance
Knauf Insulation is a globally recognised insulation solution manufactured from glass mineral wool and engineered to deliver reliable thermal resistance (R-value) and sound absorption (NRC). It is widely used in ceilings, roofs, walls and partition systems across residential, commercial and industrial buildings.
This product is sold as a variable product, allowing you to select the correct thickness based on your insulation requirements, budget and performance goals.
Available Thickness Options (Thickest → Thinnest)
🔹 200mm Knauf Insulation (2 × 100mm Rolls)
Highest-performance insulation option available.
Supplied as two 100mm rolls, installed together to achieve the maximum R-value possible in standard ceiling applications.
Best for:
• Roof ceilings
• Energy-efficient homes
• Cold regions
• Maximum electricity savings
🔹 135mm Knauf Insulation Roll
High-performance ceiling insulation offering excellent thermal resistance and acoustic control.
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Thickness: 135mm
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Roll size: 7.5m × 1.2m
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Coverage: 9m²
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R-value (insulation only): 3.38
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R-value installed (incl. ceiling system): 3.78
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NRC: 1.13
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Fire rating: Euroclass A1 (Non-combustible)
🔹 100mm Knauf Insulation Roll
The most popular all-round insulation thickness for residential and commercial ceilings.
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Thickness: 100mm
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Roll size: 10m × 1.2m
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Coverage: 12m²
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R-value (insulation only): 2.50
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R-value installed: 2.90
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NRC: 1.04
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Fire rating: Euroclass A1
🔹 75mm Knauf Insulation Roll
Ideal for ceiling insulation, top-up insulation and partition walls.
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Thickness: 75mm
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Roll size: 12.8m × 1.2m
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Coverage: 15.36m²
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R-value: 1.88
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NRC: 0.93
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Fire rating: Euroclass A1
🔹 50mm Knauf Insulation Roll
Best for applications where cavity space is limited.
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Thickness: 50mm
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Roll size: 19m × 1.2m
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Coverage: 22.8m²
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R-value: 1.25
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NRC: 0.81
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Fire rating: Euroclass A1
🔊 63mm Knauf Acoustic Insulation Roll
Specialist insulation designed primarily for sound reduction.
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Thickness: 63mm
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Roll size: 15m × 1.2m
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Coverage: 18m²
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NRC: 0.89 – 0.95
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R-value: ±1.60
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Fire rating: Euroclass A1
🔹 SPECIFICATIONS TAB (COPY EXACTLY)
Technical Specifications
Thermal Performance
| Thickness | R-Value (Insulation) | R-Value Installed |
|---|---|---|
| 200mm (2×100mm) | ±5.00 | ±5.40 |
| 135mm | 3.38 | 3.78 |
| 100mm | 2.50 | 2.90 |
| 75mm | 1.88 | ±2.30 |
| 50mm | 1.25 | ±1.60 |
| 63mm Acoustic | ±1.60 | ±1.90 |
Roll Dimensions & Coverage
| Thickness | Length | Width | Coverage |
|---|---|---|---|
| 135mm | 7.5m | 1.2m | 9m² |
| 100mm | 10m | 1.2m | 12m² |
| 75mm | 12.8m | 1.2m | 15.36m² |
| 50mm | 19m | 1.2m | 22.8m² |
| 63mm Acoustic | 15m | 1.2m | 18m² |
Acoustic Performance (NRC)
| Thickness | NRC |
|---|---|
| 135mm | 1.13 |
| 100mm | 1.04 |
| 75mm | 0.93 |
| 50mm | 0.81 |
| 63mm Acoustic | 0.89 – 0.95 |
Fire & Material
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Fire classification: Euroclass A1 – Non-combustible
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Material: Glass Mineral Wool
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Binder: ECOSE® Technology (low VOC, formaldehyde-free)
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Moisture resistance: Non-hygroscopic
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Durability: Does not sag, rot or support mould growth
🔹 KNAUF INSULATION BENEFITS (SALES SECTION)
✔ Reduces heat loss in winter
✔ Keeps interiors cooler in summer
✔ Cuts electricity and HVAC costs
✔ Improves indoor comfort
✔ Reduces airborne noise
✔ Fire-safe and non-combustible
✔ Eco-friendly manufacturing
✔ Easy to install and cut
✔ Long-lasting performance
✔ Trusted by builders and installers
🔹 FREQUENTLY ASKED QUESTIONS – KNAUF INSULATION
1. What is Knauf Insulation?
Knauf Insulation is a premium glass mineral wool insulation product designed to provide thermal insulation, sound absorption, and fire safety for ceilings, walls, roofs, and partitions.
2. What does R-value mean?
R-value measures how well insulation resists heat flow.
The higher the R-value, the better the insulation performance and the greater the energy savings.
3. What is the R-value of 135mm Knauf Insulation?
The tested insulation R-value of 135mm Knauf Insulation is 3.38, with an installed system R-value of approximately 3.78 when used in a ceiling assembly.
4. What is the difference between R-value and installed R-value?
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R-value (insulation) refers to the insulation material alone.
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Installed R-value includes the combined performance of the insulation, ceiling boards, and roof system.
5. Which Knauf Insulation thickness gives the highest R-value?
The 200mm option, made up of two 100mm rolls installed together, provides the highest R-value and best thermal performance.
6. Why is 200mm Knauf Insulation sold as two 100mm rolls?
Knauf manufactures 100mm rolls as a standard size. Installing two 100mm layers together achieves 200mm thickness and significantly improves thermal performance.
7. Which Knauf Insulation thickness is best for ceilings?
For most homes, 100mm or 135mm is ideal.
For maximum energy efficiency and comfort, 200mm is recommended.
8. Can Knauf Insulation reduce noise?
Yes. Knauf Insulation absorbs airborne sound and helps reduce noise transfer between rooms and floors, improving acoustic comfort.
9. Which product is best for soundproofing?
The 63mm Knauf Acoustic Insulation is specifically designed for sound absorption and offers the highest NRC values for noise control.
10. What does NRC mean?
NRC (Noise Reduction Coefficient) measures how much sound a material absorbs.
A higher NRC means better sound absorption and less echo or noise.
11. Is Knauf Insulation fire resistant?
Yes. Knauf Insulation has a Euroclass A1 fire rating, meaning it is non-combustible and does not contribute to fire spread.
12. What does Euroclass A1 mean?
Euroclass A1 is the highest fire safety classification, indicating the material does not ignite, burn, or produce significant smoke.
13. Is Knauf Insulation safe to install?
Yes. Knauf Insulation uses ECOSE® Technology, which is low-dust, low-VOC, and formaldehyde-free, making it safer and more comfortable to handle.
14. What is ECOSE® Technology?
ECOSE® Technology is a bio-based binder that improves indoor air quality, reduces environmental impact, and makes insulation softer to handle.
15. Can Knauf Insulation help lower electricity costs?
Yes. By reducing heat loss in winter and heat gain in summer, Knauf Insulation helps reduce heating and cooling costs.
16. Can Knauf Insulation be used in walls as well as ceilings?
Yes. Knauf Insulation is suitable for ceilings, roof spaces, internal walls, drywall partitions, and suspended ceilings.
17. Is Knauf Insulation suitable for South African climates?
Yes. Knauf Insulation is widely used across South Africa and performs well in hot, cold, inland, and coastal climates.
18. Does Knauf Insulation absorb moisture?
No. Knauf Insulation is non-hygroscopic, meaning it does not absorb moisture and does not support mould or rot.
19. How long does Knauf Insulation last?
When installed correctly, Knauf Insulation is durable and maintenance-free, with a lifespan that typically matches the life of the building.
20. Is thicker insulation always better?
Generally yes. Thicker insulation provides higher R-values, which improves energy efficiency and comfort, provided there is enough space for installation.
21. Can I combine different thicknesses of insulation?
Yes. Combining layers (for example, two 100mm rolls) is a common and effective way to increase total R-value.
22. Does Knauf Insulation improve home resale value?
Yes. Proper insulation improves energy efficiency and comfort, which can increase property appeal and resale value.
23. Can Knauf Insulation be used in renovations?
Yes. Knauf Insulation is ideal for both new builds and retrofit projects, including ceiling upgrades and renovations.
24. How do I choose the correct roll size?
Choose based on your ceiling or wall area (m²) and desired R-value. Each roll clearly states its coverage in square meters.
25. Do I need professional installation?
Knauf Insulation can be installed by professionals or experienced DIY users. For best results and compliance, professional installation is recommended.
