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Earthwool glasswool insulation: Ceiling Roll

Earthwool® glasswool insulation: ceiling roll (unfaced) provides thermal and acoustic insulation for residential roofs. Earthwool glasswool insulation: ceiling roll (unfaced) range includes a selection of R-values to provide builders, designers and installers the opportunity to choose the best thermal performance for their project.

Earthwool glasswool insulation: ceiling roll (unfaced) will improve the thermal comfort and energy efficiency of the building in which it has been installed thus keeping it cool in summer and warm in winter. The super-soft and easy to handle benefits of Earthwool glasswool have been further enhanced with TwinTech®. TwinTech heralds another advancement in insulation manufacture — the dual forming technique ensures there is a smooth finish on both sides of the insulation, which improves product handling and appearance. Earthwool glasswool is made using up to 80% recycled glass and with ECOSE® Technology, a sustainable, bio-based binder that contains no added formaldehyde.

Enhanced moisture resistance with DriTherm® technology. Earthwool glasswool insulation is silicone treated, which provides moisture resistance for up to 50 years.

Key Features
  • DriTherm Technology — silicone treated glasswool for increased durability
  • TwinTech — smooth finish on both sides
  • High thermal performance — year round comfort
  • Sound absorbing
  • Non-combustible
  • Saves energy — lower energy bills
  • No added formaldehyde
  • Soft to handle and install
  • 50 year warranty
  • Compression packed — more product per pack
  • Odourless
Thermal Insulation
Declare LBC Red List Free
Declare LBC Red List Free
Green Tag Certified
Green Tag Certified
Recycled Content (Pre-Consumer)
Pre-Consumer Recycled Content
Scope of Use
  • Earthwool® glasswool insulation has been appraised by BRANZ as a thermal insulation material for framed or part-framed walls, ceilings and roofs of domestic and commercial buildings
  • The insulation is pre-cut to suit a wide range of thermal insulation requirements and framing set-outs
  • Comes in a range of R-values — see Product Data Sheet
Limitations on Use
  • Earthwool glasswool insulation must be stored under cover and in dry conditions. 
  • Heavy objects must not be stacked on the packs. The packs must be stored in an orientation that avoids excessive compression of the product

See BRANZ Appraisal 648 for full information.

Statement of Building Code Compliance

AS/NZS 4859.1: 2018 Materials used in the Thermal Insulation of Buildings.

In the opinion of BRANZ, Earthwool® glasswool Insulation if designed, used, installed and maintained in accordance with the statements and conditions of this Appraisal, will meet or contribute to meeting the following provisions of the NZBC:

  • Clause B2 DURABILITY: Performance B2.3.1 (a) not less than 50 years and B2.3.1 (b) 15 years
    Earthwool glasswool insulation will meet these requirements. See Paragraph 8.1
  • Clause E3 INTERNAL MOISTURE: Performance E3.3.1
    Earthwool glasswool insulation will contribute to meeting this requirement. See Paragraphs 13.1 and 13.2
  • Clause F2 HAZARDOUS BUILDING MATERIALS: Performance F2.3.1
    Earthwool glasswool insulation meets this requirement and will not present a health hazard to people
  • Clause H1 ENERGY EFFICIENCY: Performance H1.3.1 (a) and H1.3.2
    Earthwool glasswool insulation will contribute to meeting this requirement. See Paragraphs 14.1 and 14.2

See BRANZ Appraisal 648 for full information.

Other Performance Attributes
  • 50 year warranty

Earthwool® glasswool is made using up to 80% recycled glass and with ECOSE Technology, a sustainable, bio-based binder that contains no added formaldehyde.

  • Declare Red List Free
  • GreenTag Certified
BRANZ Appraised
BRANZ Appraised
H1 Energy Efficiency compliant
Energy Efficiency
Data Sheet: Ceiling Roll

January 2024

Material Safety Data Sheet


BPIR - Knauf Insulation glasswool
BRANZ Appraisal 648 [2022]

648 [2022]

CodeMark Certificate

GM-CM30095 RevB

Certifire Certification


Declare Certificate: Red List Free
EUCEB Certification
Eurofins Certificate: Indoor Air Comfort Gold


GreenTag Certificate: Level A


Installation Instructions: Ceiling Roll
Warranty: Earthwool Glasswool

Knauf Insulation provides a sustainable and high performance glasswool insulation with both thermal and acoustic properties for residential and commercial applications.

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