50mm Knauf
In stock
R987,00 incl. VAT
50mm Knauf Earthwool insulation is a lightweight, effective top-up layer designed to boost the thermal performance of existing ceiling insulation and improve year-round comfort.
Est. Delivery: 14 September – 15 September
50mm Knauf Earthwool Ceiling Insulation (R1.25) – Soft-Touch ECOSE® Ceiling Roll
The 50mm Knauf Earthwool ceiling insulation is a lightweight, economical Glass Mineral Wool insulation designed for projects that require basic thermal performance at the most affordable cost. With a true R-value of 1.25, it is ideal for applications where moderate insulation is acceptable or where topping up old insulation is required.
Produced using ECOSE® Technology, this roll offers soft-touch fibres, low dust, and reduced itch compared to traditional fibreglass, making it easier to handle and safer for indoor environments. It is commonly supplied to homeowners, builders, contractors, and developers across Johannesburg, Centurion and Pretoria looking for an affordable ceiling insulation option.
Key Benefits
- R1.25 thermal rating for light insulation needs
- A1 non-combustible – highest fire safety rating
- Soft, low-itch ECOSE® Technology
- Excellent indoor air quality (very low VOC emissions)
- Good acoustic performance (NRC 0.81)
- Lightweight, economical and easy to transport
- Combi-cut options for flexible installation widths
- Resistant to moisture, mould, bacteria and rot
- Suitable for topping up older existing insulation
Technical Specifications
- Thickness: 50mm
- Thermal R-Value: 1.25 m²·K/W
- Length: 19.00 m
- Width: 1200 mm
- Coverage per Roll: 22.80 m²
- NRC: 0.81
- Fire Rating: A1 (EN 13501-1) SANS 10177-5: A (non-combustible)
- Acoustic NRC: 0.81
- Vapour Resistivity: 5.00 MN·s/g·m
Where 50mm Knauf Is Commonly Used
Ideal for:
- Budget ceiling insulation solutions
- Mild climate regions
- Rental units
- Garages & outbuildings
- Top-up insulation over existing layers
- Projects with shallow ceiling cavities
- Builders needing low-cost insulation options
Typical customers:
- Homeowners
- Developers
- Contractors
- Renovators
- Architects designing basic thermal solutions
Handling & Storage
- Store in original packaging until installation
- Keep dry and sheltered from rain/moisture
- Lightweight for easy loading, transport and storage
- Rolls should not be compressed
- Suitable for stacking in warehouses and delivery vehicles
Delivery
We supply and deliver 50mm Knauf Earthwool insulation throughout Gauteng.
Fast delivery available to contractors, residential customers, warehouses, and building sites.
Frequently Asked Questions
1. What is the R-value of 50mm Knauf Earthwool?
It provides an R-value of 1.25, verified from the Knauf datasheet.
2. How many square metres does a roll cover?
Each roll covers 22.80m², the highest coverage per roll in the Knauf ceiling range.
3. Is 50mm Knauf non-combustible?
Yes, it is A1 non-combustible, the highest fire rating.
4. Is 50mm enough for ceiling insulation?
It is suitable for mild climates, garages, rental units, or topping up older insulation. For better performance, thicker options like 75mm, 100mm or 135mm are recommended.
5. Does Knauf Earthwool cause itching?
It is much softer and lower itch than traditional fiberglass thanks to ECOSE® Technology.
Where to Go Next
- Return to the Insulation Overview → Insulation
- Explore insulation by brand → Brands
- Browse all Knauf products → Knauf
- Compare ceiling insulation options → Ceiling Insulation
Delivery Information
At Insulation Warehouse, we provide fast, reliable delivery across our service network so you get the insulation you need without delays. We are an online insulation store and do not operate as a walk-in retail outlet. All orders are placed online, processed immediately, and delivered directly to your home, site, or business.
Delivery Timeframes
- Most standard orders are delivered within 1–3 business days
- Fast dispatch from our storage facilities
- Orders are shipped as soon as payment is received
Specialized Product Lead Times
A few specialized or less common items may require additional preparation before dispatch. These can include:
- Industrial densities
- Custom-sized or made-to-order insulation
- Foil-faced products
- Commercial or non-standard rolls
When these items require extra time, we’ll let you know the expected delivery window.
Delivery Network
We deliver insulation products throughout:
- Johannesburg
- Centurion
- Pretoria
These areas form our primary delivery network, ensuring quick turnaround times for homeowners, installers, and contractors.
We can also deliver to surrounding suburbs — just send us your address if you’re unsure.
Delivery Process
- Orders leave our storage facility once paid for in full
- Delivery updates and timelines are provided
- Large orders may arrive on pallets to ensure product protection
Fast, Reliable Service
Our goal is to provide the quickest, most convenient delivery service possible. Whether you’re insulating a home, office, or development, our streamlined logistics ensure your materials arrive safely and on time.
