Buying bulk or Trade customer, contact us to get special rates!

NZBC E2/AS1 Compliant Solutions

Engineered Weather Protection for New Zealand Climates

High Performing Building Underlays, Vapour Barriers and Door & Window flashing systems. Supplying the NZ construction industry with BRANZ appraised weathertightness solutions.

Explore Product Systems arrow_forward download File Downloads
verified CodeMark & BRANZ Appraised
|
local_shipping Nationwide Delivery
Architectural timber framing envelope on New Zealand alpine building site
architecture
High Wind Zone Spec
Tested to NZS 3604 & E2/AS1 Standards
domain
BRANZ appraised
With EU certification
verified_user
E2/AS1 Ready
NZBC Compliant
precision_manufacturing
5 Years
Supplying NZ Building projects
warehouse NZ Product Range

UNDERLAYS, MEMBRANES & TAPES FOR NZ WEATHERTIGHTNESS

Shop All Products
VIBEST SUPER PRO - FLASHING TAPE 150mm x 25m

VIBEST SUPER PRO - FLASHING TAPE 150mm x 25m

ViBest Super Pro Flashing Tape (150 mm) is a premium, BRANZ-appraised window and door flashing tape by EBuilt....

$133.50 $117.60
block Out of Stock
block Sold Out View
VENTIA IRON - ROOF & WALL UNDERLAY 2.74m x 36.5m (100m2)

VENTIA IRON - ROOF & WALL UNDERLAY 2.74m x 36.5m (100m2)

Larger 2.74m wide roll of the lightweight, highly breathable Ventia Iron roof and wall underlay. High tear res...

$237.20 $209.00
block Out of Stock
block Sold Out View
VERSO VCL100 - VAPOUR BARRIER 1.5m x 50m (75m2)

VERSO VCL100 - VAPOUR BARRIER 1.5m x 50m (75m2)

High-performance vapour control layer and airtightness membrane for internal lining of passive homes, designed...

$296.80 $261.50
block Out of Stock
block Sold Out View
VENTIA PLATINUM PLUS - HEAVY DUTY UNDERLAY 1.5m X 50m (75m2)

VENTIA PLATINUM PLUS - HEAVY DUTY UNDERLAY 1.5m X 50m (75m2)

Heavy-duty, self-supporting roof and wall underlay, BRANZ appraised for both roof and wall use. Bright white,...

$339.70 $299.30
block Out of Stock
block Sold Out View
verified New Zealand Owned & Operated • Our Heritage

Engineered For New Zealand Weather — Backed By Over 20 Years of Proven Heritage

New Zealand family owned and operated, ebuilt is the sister company of E-Products NZ, with an established 20-year track record supplying leading brands across Australasia. We are the exclusive distributor of world-class mdm®NT Underlays and Weathertightness Solutions across New Zealand and Australia.

factory European Manufacturing Benchmark

mdm®NT Global Manufacturing Partnership: Headquartered in Bielsko-Biała, Poland, mdm®NT has been a benchmark pioneer in the international building sector since 1995 and is one of the world's leading producers of technical roofing membranes, multi-layer laminates, and exterior accessories. Leveraging state-of-the-art spunbonded production technology, mdm®NT delivers next-generation membranes trusted across Europe, North America, and Australasia.

Regularly featured at Europe's foremost construction expos—including BAU Munich, SAIE Bologna, Roof & Timber Stuttgart, Batimat Paris, and Ecobuild London—mdm®NT is internationally distinguished with Business Gazelles, Forbes Diamonds, and Market Leader honours.

International Quality Accreditations & Testing Bodies
workspace_premium
BBA Certified
British Board of Agrément
verified
CSTB Validated
French Building Science
shield_with_house
ZVDH Approved
German Roofing Standard
Ventia sustainable spunbonded membrane manufacturing
Global Quality • Dist. Since 1995
New Zealand Distribution

Sustainable Spunbonded Technology

Our next-generation spunbonded production line and peripheral recycling technology actively eliminate post-production waste, significantly reducing atmospheric CO² emissions while maintaining peak membrane durability.

pin_drop Wairau Valley, Auckland
scienceBuilding Science Fundamentals

What is the purpose of Building Underlay. Why does it matter?

verified_userWeathertightness, Breathability and Absorbency

Building Underlay — also known as roof and wall wrap — is your building's second line of defence, installed between the framing and the external cladding. Its primary role is to stop wind-driven rain and draughts from getting past that outer layer, while also giving temporary weather protection during construction, before the cladding goes on.

Underlay does more than keep the weather out — it also manages moisture generated from within. Everyday activities like breathing, cooking and showering create significant humidity inside our homes and businesses. Breathable synthetic underlays let this water vapour escape from wall and roof cavities, so it can drain or evaporate rather than becoming trapped. This ongoing breathability protects timber framing from dampness, mould, rot and decay — helping keep homes and buildings warmer, drier and healthier.
wb_sunny
UV Exposure Limits
Every underlay has a maximum UV exposure period before cladding or roofing must go on, and roof and wall products often have different limits. Check the period stated in the product’s appraisal or technical literature, and plan installation so the underlay is covered within it.
water_drop
Absorbency & Condensation Control
Underlays need to absorb and hold condensation, so it doesn’t run down onto timber framing. NZBC E2/AS1 sets minimum absorbency and other performance properties for roof and wall underlays.
air
Wind Zone Suitability
Underlays are rated for specific NZS 3604 wind zones. Higher wind zones may need a rigid air barrier, extra support between framing, or specific design. Confirm the site’s wind zone and the product’s rating before specifying.
local_fire_department
Fire Performance
Building underlays must meet the flammability requirements in the NZBC C/AS Acceptable Solutions, tested to AS 1530.2. This matters most where the underlay may be left exposed, such as in open soffits or unlined areas. Check the flammability index in the product documentation.
verified BRANZ Appraised Compliance

All of our Ventia underlay products are BRANZ Appraised

High performance, European-manufactured underlay systems, BRANZ appraised and held in stock for your next project.

assignment_turned_in
NZBC Clause E2/AS1 Verified
External moisture defense certified against NZ wind zones up to and including Extra High.
history_edu
50-Year B2 Durability
Meets NZBC Clause B2.3.1(a) — not less than 50 years — for wall underlays behind cladding with a 50-year durability requirement, and B2.3.1(b) — 15 years — where applicable.
check_box
Consent-Ready Documentation
Appraisal certificates and installation procedures available to support your BCA submission.
support
Specification Advisory
Technical support available to help verify installation details, wind zone suitability, and cladding compatibility.
description View BRANZ Appraisal Certificates Contact Us
verified
Compliance Dossier
Building Research Association of New Zealand
Current
Appraisal No. 1136 (2020, amended 2026)
Ventia Iron Roof Underlay & Ventia Metal with Drainage Mat
Appraisal No. 1137 (2020, amended 2026)
Ventia Iron Wall Underlay
Appraisal No. 1258 (2025)
Ventia Iron Black Self Adhesive Wall Underlay
NZBC Clauses
B2 (Durability), E2 (External Moisture), F2 (Hazardous Building Materials)
bolt
Streamlined Consent Pathway

Referencing a current BRANZ Appraisal in your specification gives Building Consent Authorities an established, documented compliance pathway, reducing requests for information during consenting.

Trade Reliability

Why Leading Builders Choose ebuilt

Engineered supply chains and trusted technical support across New Zealand.

local_shipping

Fast Nationwide Delivery

Shipping daily across NZ

Freight dispatched daily throughout NZ, from our hubs in Auckland - South, Auckland - North and Christchurch, direct-to-site, to your business.

schedule Overnight Dispatch Nth & Sth Island Depots
verified_user

100% European Made

Full manufacturer warranty

Exclusively authentic European-engineered membranes & flashing tapes backed by full NZBC appraisal warranties.

shieldDirect manufacturer backed BRANZ Appraised
support_agent

Expert Support

Over 30 years of manufacturing and innovation

Supported by product experts, for all specification, selection and installation needs.

call+64 9 916 6750 Weekdays 8am–3pm

To get in touch call our specifications & customer support team

Phone: +64 9 916 6750 • Hours: 8:00am to 3:00pm weekdays (closed on Public Holidays)

Email: [email protected]

Address: 1b/89 Ellice Road, Wairau Valley, Auckland, New Zealand

Have plans or takeoff queries? Send through your specifications or contact our Auckland team directly.

forum Contact Us Now