Vertical Shiplap Weatherboards

Introducing New Zealands First Cedar Shiplap System Tested to NZBC E2/AS1 VM1


JSC VertiClad
Horizontal Cavity Solution

JSC VertiClad, offers both wrap and rigid air barrier options along with the new JSC VertiClad batten profiles to complete an exclusive new range.

JSC Timber have been the first to develop a fully tested horizontal and vertical cavity system for Western Red Cedar in both Vertical Shiplap and Rusticated Cedar Weatherboards formats.

JSC VertiClad is tested to NZBC E2/AS1 VM1 in respect to the requirements of clauses B1, B2 and E2 and gives a full Producer Statement-Design from an ACE accredited façade engineer.

Vertical Shiplap Weatherboards offer variety and versatility that compliments any architectural style, it adapts equally as well to bold expressive modernism or the well defined criteria of period styling. Available in a wide range of standard and architectural profiles that offer amazing architectural potential. Vertical Shiplap is a look that is currently re-defining the NZ coastal landscape with random patterns that incorporate 8”, 6” and 4” profiles to the retro 4” Mini Shiplap.

Residential and light Commercial cladding as per NZS 3604/E2AS1 direct and cavity fixing.

As per NZS 3617 or Branz Bulletin 411 
Standard, Architectural and Custom Profiles available.

As per NZS 3631: 1988 - PC1 Premium Clears One and PC2 Premium Clears Two.

As per NZS 3602 Class 2 durability for use above ground. In long lengths to profile detailed with species and grading to the requirements of NZS 3602 but with all knots excluded.  To NZS 3602, table 2, Requirements for wood-based building components to achieve a 15-year durability performance.

BSF (Band Sawn Face) or DF (Dressed Face).

Length Spread:
2400mm to 5900mm random, selected lengths available on request. 

J40, J41, J42, APJC4 Dressed profiles 90X19mm, 69X19mm

Nails - Silicone Bronze or Stainless Steel.

Fxings to NZBC E2/AS1 Table 24. JSC Rose /Pentagon/Flat or Jolt Head (Paint Finish Only) Annular Groove Nails, Refer to JSC Timber for Manufacturer details / correct sizes and fixing details and options available.

JSC specifically developed the 22mm thick weatherboard and fascia range to increase the durability  and stability of Western Red Cedar Cladding. JSC Timber recommends DuraCedar in instances where dark stains are to be used Read more about
JSC DuraCedarDuraCedar-Logo.jpg

Finishes: CedarShield - Factory Applied Weatherboard Coating System

JSC specifically developed the CedarShield system to responsibly manage and increase the performance of Western Red Cedar against the harsh New Zealand environment.

The CedarShield System offers factory applied coating within a controlled environment delivering a full envelope seal to Weatherboards, Fascia, Panelling and Dressed profiles prior to delivery.

CedarShield ensures a consistent application for improved appearance and increased finish life and durability without unsightly lap marks or acclimatisation lines.

Coating options include both oil and water based coating systems with many new and innovative colours available.JSC-LOGO-CedarShield-new.jpg

Fixing Vertical Shiplap Weatherboards:
Use JSC Setout Tool to align weathergrooves to ensure there is a 2mm expansion gap between lapped boards.

Single face fix weatherboards to every fixing point, with nail driven in with a slight upward slope, 35mm from overlapping edge of weatherboard.  DO NOT PIN LAPS OF WEATHERBOARDS.  Line nails horizontally across the boards.

Nails to achieve a mimimum 35mm embedment into the framing.  Follow JSC Timber Installation Guide - email

Vertical Shiplap JSC VertiClad Cavity System

      • Report: Producer Statement Design PS1 Testing JSC VertiClad System, JSC Timber Vertical Shiplap cavity system to NZBC E2/VM1.
      • Test Report data and technical details available by contacting JSC Architectural.
      • Detail Range/Drawing Index: Index JV-C and Index JV-RB 

Masterspec section 4221 Western Red Cedar Cladding. and Smartspec -


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