You are using an outdated browser version not supported by this website.
Click here to upgrade your browser

Roof Underlay (SOLITEX MENTO 3000)

SOLITEX MENTO 3000 roof underlay is a three-layer roof underlay designed to be used with most typical roof cladding systems. While providing temporary weather protection it can remain exposed for up to 90 days. 

Optional Accessories:

  • TESCON EXTORA is used to seal the overlaps
  • ORCON should be used in addition to EXTORA for sealing overlaps on a roof pitch of less than 15º
  • KAFLEX or ROFLEX Grommets are used to seal around cable and pipe penetrations
  • TESCON NAIDEC Double sided butyl rubber tape, used as a nail sealing tape on the underside of a purlin / batten on roofs to form a durable seal around nail or screw penetrations

SOLITEX MENTO 3000 roll sizes: (75sqm) 1.5m or (150sqm) 3.0m wide and 50m long 

Key Features
  • High performance monolithic nonporous membrane
  • High water resistance: water column more than 10,000 mm based on EN 20811
  • Low vapour resistance: very low MVTR with active vapour transport
  • High durability under all conditions: unaffected by wood preservatives
  • Thermostable: thermostability above 100°C
  • UV stabilised: can be exposed to the New Zealand elements for 90 days
Scope of Use

SOLITEX MENTO 3000 has been appraised for use as a self-supporting roof underlay on buildings within the following scope:

  • the scope of limitations of NZBC Acceptable Solution E2/AS1, Paragraph 1.1 with regards to building height and floor plan area; and,
  • with masonry tile roof cladding; and,
  • with metal tile and profiles metal roof cladding; and,
  • suited to NZS 3604 Wind Zones up to, and including Extra High.
Limitations on Use

SOLITEX MENTO 3000 provides a degree of temporary weather protection during early construction. This, however, does not guarantee weathertightness and some wetting of the underlying structure is always possible before the roof cladding is installed. Hence, the entire building must be closed in and made weatherproof before moisture sensitive materials such as ceiling linings and insulation materials are installed.

SOLITEX MENTO 3000 must not be exposed to the weather or ultra violet light for more than 90 days before being covered by the roof cladding.

NZS 3604 Wind Zone Extra High suitable
Extra High Wind Zone
Statement of Building Code Compliance

In the opinion of BRANZ, SOLITEX MENTO 3000, if used, designed, installed and maintained in accordance with the statements and conditions of the BRANZ 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, B2.3.1(b), 15 years and B2.3.2 SOLITEX MENTO 3000 meets these requirements. See Paragraphs 9.1 and 9.2 of the BRANZ Appraisal.
  • Clause F2 HAZARDOUS BUILDING MATERIALS: Performance F2.3.1 SOLITEX MENTO 3000 meets this requirement and will not present a health hazard to people.
  • Clause E2 EXTERNAL MOISTURE: Performance E2.3.2 When used as part of the cladding system, SOLITEX MENTO 3000 will contribute to meeting this requirement. See Paragraphs 12.1 and 12.2 of the BRANZ Appraisal.
Other Performance Attributes
  • Cover-fleece + protective-layer: PP microfibre fleeces
  • Membrane: monolithic TEEE film
  • Colour: anthracite
  • Surface weight: 150 ±5 g/m²
  • Temperature resistance: -40 °C bis +120°C
  • MVTR-value: very low
  • Thickness: 0.45 ±0.05 mm
  • Tensile strength MD/CD: (based on EN 12311-1) 300 ±20 N/5 cm / 220 ±20 N/5 cm
  • UV exposure: 90 days
  • Shrinkage: < 0.5 %
  • Flammability: < 5
B2 Durability compliant
E2 External Moisture compliant
External Moisture
F2 Hazardous Building Materials compliant
Hazardous Building Materials
Data Sheet
Material Safety Data Sheet
Independent Appraisal (BRANZ)
Red List Free
Specification Clause/Guide
NZ Study on Airtightness and Moisture Management
CAD/PDF Details
Skillion Roof Vented Ridge Cap


Typica Valley Detail


Skillion Eave Vented Soffit


Skillion Eave Vented Fascia


Roof Truss Open Underlay Vented Ridge Cap


pro clima are a leading manufacturer of air and weather tightness patented building systems, providing healthy, energy efficient and sustainable environments.

Product Enquiries

News from pro clima

Smart Vapour Control Layer Contributes to Kāinga Ora Retrofit Program
A Weather Resistive Barrier Solution for Rainscreen Claddings
Unique Curved Roof Protected with High-Performance Building Wrap

Posts by Thomas van Raamsdonk

See All

Get a free weekly digest of essential news

New and updated architectural products, design solutions, inspiration, technical advice and more when you sign up for EBOSS.