Cavity Closers — Weatherboard by Masons

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Cavity Closers — Weatherboard

Masons

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Description

Masons have a top and bottom Cavity Closer from extruded uPVC to be used in either a drained or ventilated cavity wall situation.

Key Features

A preformed sloped edge to provide the correct angle for the first course of weatherboard.
The angled edge creates a tight and consistent seal with the weatherboard to prevent water from wicking up from the ground or from a sprinkler head. The tight seal also prevents vermin intrusion into the cavity. *Designers/builders must use the correct size weatherboard starter / cavity closer to achieve this seal and comply with the NZ Building Code.
Ventilation holes to allow moisture drainage from the cavity. Bottom ventilation permits a minimum of 1000mm² per metre length of air into the cavity as specified by E2/AS1. For enhanced drying capacity, use with the Top Vent Closer.
Strong product thickness to provide weatherboard support.
Available in 3 sizes — 30mm, 33mm and 35mm.

Ranges

E2 Flashings

Scope of Use

The New Zealand Building Code section E2/AS1 (9.1.8.2) requires using a Cavity Closer as part of properly constructing a drained cavity wall. The function of the Weatherboard Starter / Cavity Closer is to provide support and the correct starter angle for the first course of weatherboard, prevent vermin intrusion, and to promote weather-tightness by allowing drainage and air ventilation to dry the cavity should moisture breach the external cladding.

The Masons/Redway range of uPVC Weatherboard Starters have been designed to provide the ideal solution for architects, builders and installers to meet these requirements. Redway Weatherboard Starters / Cavity Closers are available at all leading building merchants nationwide.

Limitations on Use

When installing weatherboards without a cavity, fix the Redway Cant Strip (Weatherboard Starter) before the first course of weatherboard to achieve the correct angle and provide support for the weatherboard. This method saves time, money and materials when compared to ripping a piece of weatherboard as a starter.

The Cant Strip is manufactured from the same durable uPVC compound as other Redway flashings.

Other Performance Attributes

All Weatherboard Starters/Cavity Closers are manufactured from rigid uPVC and are supplied in 2.7m lengths.

All products are biologically and chemically resistant to treated materials such as treated timber. They will not rust nor react if in a salt zone.
The uPVC compound is stabilised for UV protection as required by the NZBC.
It is lightweight, allowing for easy transportation and installation.

BRANZ Appraised

Documents

BPIR

V2.0 February 2024

pdf

BRANZ Appraisal 980

URL

Warranty

V2.0 February 2024

pdf

CAD/PDF Details

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Since being established in 1999, Masons has become a key supplier in the New Zealand building industry, offering a variety of quality systems and products for a whole range of building requirements.

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