KNAUF EARTHWOOL INSULATION

135mm Knauf Ceiling Roll

Name: 135mm Knauf Ceiling Roll
Brand: Knauf Insulation
Price: 928.00 ZAR

The 135mm Knauf Ceiling Roll is a glass mineral wool insulation product designed for residential ceilings. With R3.38 thermal resistance and 9m² coverage per roll, it provides effective thermal and acoustic insulation. View our 135mm Knauf insulation price and request a VAT-inclusive quotation for supply or installation.

Request 135mm Knauf Price Calculate Your Rolls

Euroclass A1 Non-combustible

ECOSE® Technology No added formaldehyde

Thermal & acoustic Comfort

135mm Knauf Earthwool Ceiling Roll glass mineral wool insulation

R3.38 Thermal
Resistance

135mm Knauf Price Per Roll

VAT-inclusive material price

R928.00 per roll

R103.11 per m² (incl. VAT)

The 135mm Knauf Ceiling Roll provides 9m² of glass mineral wool insulation with R3.38 thermal resistance. Prices are for complete rolls, excluding delivery and installation.

Request a Quote Compare Knauf Insulation Prices

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

135mm Knauf Specifications

Thickness	135mm
R-value (South Africa)	R3.38 m²K/W
Roll coverage	9.00m²
Roll length	7.50m
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.

R3.38 Thermal Resistance

With a thermal resistance of R3.38, the 135mm Knauf Ceiling Roll helps reduce heat transfer through the ceiling. This helps keep indoor spaces cooler during summer and warmer during winter, improving thermal comfort throughout the year.

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 135mm Knauf Ceiling Roll

The 135mm Knauf Ceiling Roll is designed for insulation above residential ceilings, helping reduce heat transfer between the living space and the roof. It is suitable for new and existing homes where the ceiling space provides sufficient access and clearance for the full insulation thickness.

Pitched-roof ceiling spaces
New residential ceiling installations
Existing ceilings with suitable access
Above bedrooms and living areas
Ceiling insulation upgrades requiring higher thermal resistance

Calculate How Many Rolls You Need

Enter your ceiling area to estimate the number of 135mm Knauf Ceiling Rolls required and the VAT-inclusive material cost.

Ceiling area (m²)

m²

Cutting allowance:

Please enter a valid ceiling area.

Each 135mm Knauf Ceiling Roll covers 9m². The calculator rounds up to complete rolls. The cutting allowance helps account for fitting and offcuts.

Your Roll Estimate

For a 50m² ceiling area:

6 rolls 54m² purchased coverage

Area including 5% allowance: 52.50m²

Estimated material total (incl. VAT) R 5 568,00 Based on R928 per complete roll. Delivery and installation excluded.

Request a Knauf Quote

135mm vs 100mm Knauf Ceiling Roll

The Knauf 135mm Ceiling Roll provides greater thermal resistance than the 100mm version, while covering less ceiling area per roll. Compare their performance, roll coverage and VAT-inclusive material prices below.

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 135mm roll has a higher insulation R-value, while the 100mm roll covers 3.12m² more area per roll. The appropriate thickness depends on your thermal requirements, 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 100mm 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

135mm Knauf FAQs

View All FAQs

What is the R-value of 135mm Knauf insulation?

The South African thermal R-value is R3.38 m²K/W. This measures the insulation's resistance to heat transfer. A higher R-value indicates greater thermal resistance.

How much area does one roll cover?

Each roll covers 9m², with nominal dimensions of 7.5m long by 1.2m wide. Insulation is supplied in complete rolls.

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

How much does Knauf 135mm insulation cost?

The listed material price is R928.00 per roll including VAT. With 9m² coverage, this works out to approximately R103.11 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 135mm Knauf Ceiling Roll and installation quotations for suitable properties in Johannesburg and Pretoria.

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

READY TO GET STARTED?

Need 135mm Knauf Insulation Prices? Request a Quote Today.

Get a quotation for 135mm Knauf Ceiling Roll at R928 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 135mm Knauf Ceiling Roll?

Request a quotation or calculate how many 135mm Knauf rolls you need.

Request 135mm Knauf Pricing Calculate Your Rolls

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