KNAUF EARTHWOOL INSULATION

100mm Knauf Ceiling Roll

Name: 100mm Knauf Ceiling Roll
Brand: Knauf Insulation
Price: 943.00 ZAR

The 100mm Knauf Ceiling Roll is a glass mineral wool insulation product designed for residential ceilings. With R2.50 thermal resistance and 12.12m² coverage per roll, it helps reduce heat transfer and absorb sound. View product details or request a VAT-inclusive quotation for supply or installation.

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Euroclass A1 Non-combustible

ECOSE® Technology No added formaldehyde

Thermal & acoustic Comfort

100mm Knauf Earthwool Ceiling Roll glass mineral wool insulation

R2.50 Thermal
Resistance

100mm Knauf Price Per Roll

VAT-inclusive material price

R943.00 per roll

R77.81 per m² (incl. VAT)

The 100mm Knauf Ceiling Roll provides 12.12m² of glass mineral wool insulation with R2.50 thermal resistance. Prices are for complete rolls, excluding delivery and installation.

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All displayed material prices include VAT
Supply-only quotations available
Installation enquiries for Johannesburg and Pretoria
Delivery costs confirmed by quotation

Technical Specifications

Thickness	100mm
R-value (South Africa)	R2.50 m²K/W
Roll coverage	12.12m²
Roll length	10.10m
Roll width	1.20m
Fire classification	Euroclass A1
Material	Glass mineral wool
Binder technology	ECOSE® Technology
Manufacturer formats	Uncut / Combi-cut

Official Knauf Technical Datasheet Ceiling Roll · September 2025

View Datasheet

Dimensions are nominal. The South African R-value is based on a 23°C mean temperature. Confirm the available roll format when ordering.

R2.50 Thermal Resistance

The 100mm Knauf Ceiling Roll provides R2.50 thermal resistance, helping reduce heat transfer through residential ceilings. This improves thermal comfort by limiting heat entering the home during summer and heat escaping during winter. The glass mineral wool also helps absorb sound.

Helps keep homes cooler in summer

Helps retain warmth during winter

Helps reduce heating and cooling demand

Glass mineral wool helps absorb sound

Where to Use 100mm Knauf Ceiling Roll

The 100mm Knauf Ceiling Roll is designed for installation above residential ceilings, providing R2.50 thermal resistance to help limit heat transfer between living areas and the roof space. It is suitable for new ceiling installations and upgrades to existing homes where there is sufficient access and clearance to install the insulation at its full 100mm thickness.

Pitched-roof ceiling spaces
New residential ceiling installations
Existing ceilings with suitable access
Above bedrooms and living areas
Ceiling insulation upgrades where 100mm thickness meets the intended thermal requirements

Calculate How Many Rolls You Need

Enter your ceiling area to estimate the number of 100mm Knauf Ceiling Rolls required and the VAT-inclusive material cost.

Ceiling area (m²)

m²

Cutting allowance:

Please enter a valid ceiling area.

Each 100mm Knauf Ceiling Roll covers 12.12m². The calculator rounds up to complete rolls. The cutting allowance helps account for fitting and offcuts.

Your Roll Estimate

For a 50m² ceiling area:

5 rolls 60.6m² purchased coverage

Area including 5% allowance: 52.50m²

Estimated material total (incl. VAT) R 4 715,00 Based on R943 per complete roll. Delivery and installation excluded.

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100mm vs 135mm Knauf Ceiling Roll

The Knauf 100mm Ceiling Roll provides R2.50 thermal resistance and covers 12.12m² per roll. Compare it with the thicker 135mm version to understand the differences in insulation performance, roll coverage and VAT-inclusive material prices.

Product	R-value (SA)	Roll coverage	Price per roll (incl. VAT)	Key difference
100mm Knauf	R2.50	12.12m²	R943.00	Greater coverage per roll
135mm Knauf	R3.38	9.00m²	R928.00	Higher thermal resistance

Which thickness should you choose? The 100mm roll covers 3.12m² more ceiling area per roll, while the 135mm roll offers higher thermal resistance at R3.38 compared with R2.50. Choose according to the required insulation performance, available ceiling space and installation conditions.

Explore Other Knauf Ceiling Roll Thicknesses

View individual product information

50mm Knauf Ceiling Roll View product 75mm Knauf Ceiling Roll View product 135mm Knauf Ceiling Roll View product

R-values and roll coverage follow Knauf's September 2025 Ceiling Roll datasheet. Prices are Earthwool's VAT-inclusive material prices. Delivery and installation are excluded.

Compare All Knauf Insulation Prices

100mm Knauf FAQs

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What is the R-value of 100mm Knauf insulation?

The South African thermal R-value is R2.50 m²K/W. This indicates the material's resistance to heat transfer. A higher R-value represents greater thermal resistance.

How many square metres does one roll cover?

Each roll covers 12.12m², with nominal dimensions of 10.10m long by 1.20m wide. Insulation is supplied in complete rolls.

Use our roll calculator to estimate how many rolls you need for your ceiling area, including a cutting allowance.

How much does Knauf 100mm insulation cost?

The listed material price is R943.00 per roll including VAT. With 12.12m² coverage, this works out to approximately R77.81 per m² including VAT.

Delivery and installation costs are quoted separately. To compare the full thickness range, visit our Knauf insulation prices page.

Do you offer supply and installation?

Yes. Earthwool handles supply enquiries for the 100mm Knauf Ceiling Roll and installation quotations for suitable properties in Johannesburg and Pretoria.

Provide your ceiling area and delivery location so we can confirm material quantities, availability and installation costs. Request a quotation .

READY TO GET STARTED?

Need 100mm Knauf Insulation Prices? Request a Quote Today.

Get a quotation for 100mm Knauf Ceiling Roll at R943 per roll including VAT. Tell us your ceiling area and delivery location, and we'll help confirm roll quantities, supply costs and installation options in Johannesburg and Pretoria.

VAT-inclusive pricing

Supply-only quotations

Installation enquiries

Need 100mm Knauf Ceiling Roll?

Request a quotation or calculate how many 100mm Knauf rolls you need.

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Material price includes VAT. Delivery and installation are quoted separately. Stock availability is subject to confirmation.