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E3 AS1 System: Laminate Overlay on Timber Subfloors, Kitchens, Toilets & Laundries — Watersplash

An installation system for laminate overlay on timber subfloors for wet rooms watersplash, for NZBC Alternative Solution E3/AS1 — internal moisture for finishes to floors: kitchens, toilets and laundries.

  • Composite Timber Subfloor Sheet Type: Particle Board/Plywood/Strandfloor
  • OPTION A.) Sheet Overlay: Trimtec Hardboard 5.5mm thickness
    OPTION B.) Levelling System: UZIN PE650 Flexible filler/primer with 3mm minimum thickness UZIN NC196 Fibre Reinforced
  • Propriety Moisture Resistant Underlayment (as per systems recommended by the Laminate Flooring Supplier)
  • Interlocking Laminate Flooring System
Key Features
  • Seamless Flooring System Components Compatibility
  • Suitable for all NZ certified Laminates
  • Masterspec PartnerNet Work Section Support
  • National supply of readily available trusted flooring preparation and installation systems product brands
  • Low VOC safe to use systems
Scope of Use
  • Systems for Composite Timber Subfloor Sheet Type: Particle Board/Plywood/Strandfloor
  • Must be read in conjunction with E3/AS1 November 4th 2021 Building Code — information is only to assist in the Alternative Solutions options for the installer
  • It is essential the Laminate supplier provides their own documentation as to the floor coverings' suitability as required by E3/AS1 
Limitations on Use

For Cross Laminate Timber (CLT)/Parallel Laminated Timber (PLT) Type Construction Panel Subfloors: Contact Gilt Edge Technical for project specific system advice and selections.

  • Interior use only
Statement of Building Code Compliance

Changes to E3/AS1 internal moisture building code for finishes to floors:

The Functional requirement given in the clause E3.2 is the "building must be constructed to avoid the likelihood of –

  • (a) Fungal growth or the accumulation of contaminants on linings and other building elements; and
  • (b) Free water overflow penetrating to an adjoining household unit; and
  • (c) Damage to building elements being caused by the presence of moisture."

There are two situations that need consideration when choosing flooring finishes.

  • 1. Containment — water from Accidental overflow from a sanitary fixture that "could damage an adjoining household unit or other property."
  • 2. Watersplash — "water can penetrate behind or under floor finishes in situations where watersplash occurs regularly (such as around shower enclosures or the fronts of built-in baths), unless these edges are sealed or coved."
In-Service History

For over fifty years Gilt Edge Industries has been a trusted national supplier of all the essential key elements of subfloor preparation and flooring installation. With 'best in class' supply partners assisting with specification development and technical advice, Gilt Edge Architectural services has evolved.

Gilt Edge support  projects with Masterspec PartnerNet Work Section Support. Gilt Edge Architectural now have four key sections in Masterspec:

  • 3124GE Gilt Edge Concrete Cure, Hardener, Moisture Control & Protection
  • 6122GE Gilt Edge Floor Levelling Systems
  • 6511GE Gilt Edge Residential and Commercial Underlay Systems
  • 6614GE Gilt Edge Stair Nosings, Transitions & Trim

Focus is to mitigate project risk, develop innovative solutions and ensuring the project installations are NZ Building Code/NZ Flooring Association Standards compliant.

Other Performance Attributes

UZIN Systems Components Green Star Compliant: Standards & Codes Recognising CDPH Standard Method V1.2 (partial list)

  • USGBC LEED Version 4, BD&C, ID&C
  • The WELL Building Standard
  • ANSI/GBI 01, Green Building Assessment Protocol


Supply partner product warranty applies to all seamless systems components.

System Overview


Gilt Edge on Masterspec

Gilt Edge Architectural partner with Architects and Specifiers nationally, to deliver trusted technical advice, and Seamless Flooring Systems Masterspec PartnerNet Specification writing assistance.

Product Enquiries

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