H-Clad KiwiTEC Larch Board & Batten by HTL

H-Clad KiwiTEC Larch Board & Batten

HTL

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Description

HTL’s H-Clad KiwiTEC Larch Board & Batten Weatherboards are a vertical cladding best suited for light commercial and residential buildings. Made from durable and sustainable NZ Larch, this provides long-lasting exteriors with minimal maintenance and maximum protection against moisture and weather damage. Larch is pale yellow, almost white in colour with clearly marked tight rings and a smooth surface for a beachy aesthetic and striking stain application.

The H-Clad KiwiTEC Board & Batten system is a first and second line of defence against water penetration by separating the cladding from the external wall frame with a drained cavity, or using direct fix installation.

The weatherboards are pre-finished with two coats of DRYDEN WoodOil.

Board & Batten is available in the following 19mm wide profiles options, along with a range of exterior mouldings.

HTL123 — Batten 65mm Cover
HTL124 — Batten 90mm Cover
HTL120 — Board 77mm Cover
HTL121 — Board 122mm Cover

Key Features

Larch cladding offers architects a sustainable, durable, and versatile solution for both commercial and residential projects. Its natural and environmental benefits, coupled with the advanced design of the HTL cladding system, make it a superior choice for contemporary building needs.

Larch is pale yellow, almost white in colour with clearly marked tight annual rings. This wood is straight-grained and contains tight knots with a fine smooth surface, a striking pattern often sought after and without stain it can achieve a grey-weathered beachy aesthetic but receives stain well to accentuate the grain
It is classed as a softwood, but one of the harder softwoods available
Breathable and a natural insulator: while absorbing the heat from the sun while maintaining waterproof properties
Chemical-free and Naturally Durable: Larch cladding is inherently durable due to the wood's natural resistance to decay and pests. It eliminates the need for chemical treatments, providing an environmentally safe and health-conscious building material.
Sustainable and Renewable Resource: Larch is sourced from sustainably managed forests, ensuring a renewable supply. This aligns with sustainable building practices and reduces environmental impact.
NZ Grown: Locally grown in New Zealand, Larch supports reducing the carbon footprint associated with imported materials.
Carbon Sequestering: Larch absorbs carbon dioxide, aiding in carbon reduction efforts. When used as cladding, this carbon remains sequestered, contributing to long-term environmental benefits.
Dual Defence Against Water Penetration: The H-Clad KiwiTEC Board & Batten cladding system employs a dual-layer defence by incorporating a minimum 18mm drained cavity between the cladding and the external wall frame. This ensures optimal water drainage and mitigates the risk of water infiltration, preserving the building's structural integrity.
Versatile Application for Various Building Types: H-Clad KiwiTEC Board & Batten are engineered for both light commercial and residential buildings, providing a versatile and reliable cladding solution suitable for diverse architectural projects.
Variety of Finishes: Band Sawn Face (BSF) and Dressed Face (DF): The H-Clad Board & Batten is available in two distinct finishes. The Band Sawn Face (BSF) offers enhanced durability due to its textured surface, while the Dressed Face (DF) provides a smooth, refined appearance, catering to aesthetic and functional preferences.
Exceeds 15 year Minimum Durability Requirement: When installed above ground, H-Clad KiwiTEC Board & Batten surpasses the 15 year minimum durability requirement, ensuring long-term performance and reliability.
Enhanced Protection with DRYDEN WoodOil: H-Clad products treated with DRYDEN WoodOil benefit from a water-repellent, non-filming, and deeply penetrating timber protector. This treatment maximises the natural resilience of Larch, maintaining its structural integrity and visual appeal over time.

Scope of Use

Cavity or Direct Fix

H-Clad KiwiTEC Board & Batten is suitable as a vertical external fixed wall cladding, meet the requirements and limitations of the following:

NZBC Acceptable System — E2/AS1, Paragraph 1.1
Timber framing compliant with NZS 3604:2011
Risk score of 0-20 calculated from NZBC Acceptable Solution E2/AS1, Table 2; and,
NZS 3604:2011, Sec5.2 Wind Zones, including 'Very High'
All materials and processes contained in the NZS 3604:2011 building scope

All HTL H-Clad Weatherboards meet the requirements of the NZ Building Code for Clauses B1 Structure, B2 Durability and E2 Exterior Moisture when installed in accordance with the HTL installation guide.

Limitations on Use

H-Clad KiwiTEC Board & Batten must be designed and installed in accordance with the HTL Board & Batten Technical Guide for Specifiers and Installers.

H-Clad is manufactured with care and inspected to ensure quality. However, it is a natural wood product and subject to variations in weight, density, colour, grain and performance. Care must be taken in installation and maintenance to allow for movement.

Storage and Handling

Care must be taken to ensure that timber and accessories are kept clean and dry, and are not damaged whilst in storage awaiting application. Extra care is to be taken while handling timber to ensure that they are not damaged. Timber is to be stacked on flat level bearers that are a maximum of 900mm apart and at least 100mm off the ground.

Timber should either be stored inside an enclosed building or covered and protected from the elements when stored outside

Important: Timber weatherboards should not be installed if their moisture content is outside the range of 14 - 18 %

Coating Requirements

It is not recommended that HTL weatherboards be left uncoated.

HTL recommends that all timber H-clad cladding should be envelope coated before installation, including all cut ends and exposed fresh timber. Avoid coating the top surface only, once installed as this will likely cause movement (cupping) in the timber surface.

HTL do not recommend the use of dark paints or coatings as this may accentuate movement and splitting of the timber, especially if it is exposed to the sun or hot temperatures. Timber generally requires a coating with a Light Reflective Value (LRV) of 40% or greater to minimise the amount of heat build-up in the timber and the resultant thermal movement. (NB: Black ≈ 5% & White ≈ 95%)

Dryden WoodOil Note:

For fire rating — Two coats of Dryden WoodOil coated on 18.5mm Western Red Cedar as Group 3 (NZBC) Test Report 7-599140-CO
Light Reflective Values (LRV) — LRV cannot be determined for semi-transparent coatings, as the colour of the timber coated and the number of coats applied impacts measured LRV.

Statement of Building Code Compliance

If installed, used and fitted as instructed in the HTL Board & Batten Weatherboards Technical Guide for Specifiers and Installers, H-Clad KiwiTEC Board & Batten Weatherboard will comply with these provisions of the New Zealand Building Code:

Section B1 — Structure: Performance B1.3.1, B1.3.2 and B1.3.4 for loads arising from selfweight, wind, impact and creep. (i.e. B1.3.3 (a), (h), (j) and (q).
Section B2 — Durability: Performance B2.3.1 (b) 15 years and B2.3.2.
Section E2 — External Moisture: Performance E2.3.2.
Section F2 — Hazardous Building Materials: Performance: F2.3.1

H-Clad KiwiTEC Board & Batten weatherboards are an Alternative Solution in terms of New Zealand Building Code Compliance.

Other Performance Attributes

HTL H-Clad KiwiTEC Larch Weatherboards are manufactured from New Zealand Larch (Larix Decidua) and comply with NZS 3602:2003; Table 2:2A1-Species. Weatherboards are supplied in Dressing Heart Grade (NZS 3602:2003; Table 2:2A1-Grade) with varying knot types.

H-Clad KiwiTEC Board & Batten Weatherboards are supplied dry, with moisture content at 16% or less (see NZS 3602:2003, Table 2:2A1-Moisture).

Documents

HTL Technical Guide for Specifiers & Installers — Board & Batten

v1.0 2020

pdf