As buildings become taller and more exposed, window and façade systems are required to perform under increasingly demanding wind and weather conditions. While laboratory testing confirms product capability, it does not verify how systems perform once installed, particularly at critical interfaces and junctions.
Veron provides independent, WGANZ-accredited onsite window and joinery testing, verifying in-situ performance and installation quality in accordance with recognised industry procedures. In addition, we undertake targeted testing of windows with confirmed leaks or performance failures to determine cause and effect, and provide clear advice on appropriate remedial works.
You can view Veron listed as an accredited WGANZ field testing provider here: https://www.wganz.org.nz/field-testing/
New Zealand’s increasingly tall and exposed buildings are required to perform under higher wind pressures and more demanding weather conditions. Onsite testing verifies how installed window and door systems perform in real-world conditions – see below for the types of onsite performance testing Veron undertakes.
This test assesses the in-situ performance of installed windows and doors under controlled water spray and pressure conditions. It focuses on critical junctions and interfaces to confirm installation quality and performance under typical wind-driven rain exposure.
WGANZ 501A builds on the 501 test by applying higher pressure steps, providing additional assurance where buildings are more exposed or subject to increased performance demands.
WGANZ 502 provides a framework for the field testing of newly installed window and door systems to verify in-situ performance under controlled water and air pressure conditions. It is typically used for quality assurance on larger more complex joinery installations, where enhanced verification of installation and performance is required due to exposure, building height, or system configuration.
Testing only adds value when it leads to clear next steps. We plan each test to suit the building, its exposure, and risk, carry out testing using calibrated equipment, and provide immediate feedback where critical issues are identified.
You receive a clear, evidence-based report documenting test results and identifying failure locations and mechanisms, supported by photographs and test data in order to allow a remedial solution to be formed.
Typical indicators include staining or swelling of internal linings, musty odours, unexpected condensation, and visible gaps in flashings or sealant. Even minor symptoms can mask moisture pathways into framing and insulation. Onsite testing confirms whether issues are isolated or systemic and prevents both unnecessary invasive work and escalating damage.
Laboratory certification covers only the window unit in controlled conditions. Onsite testing evaluates the installed system, including the critical windowtowall junction, workmanship, materials interfaces, and site exposure. It provides the realworld performance proof that councils, insurers, and owners rely on for decisions.
Clause E2 of the Building Code governs external moisture, and NZS 4211 sets joinery performance criteria. AAMA field protocols add calibrated, repeatable verification that exceeds simple water tests and is widely accepted for QA and diagnostics. For façades, we align with AS/NZS 4284 principles.
AAMA methods replicate winddriven rain with controlled pressure differentials and water application. This exposes failures that casual hosing can miss and produces results that stand up in contractual, insurance, and dispute contexts.
Test after joinery, flashings, and cladding are installed but before internal linings. On larger projects, test a
sample early in the sequence to prevent systemic errors. During remediation, verify repairs before reinstating
finishes to avoid rework and delays.
