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Woodspan PLT Roof — Medium Density

Woodspan PLT Roof panels (parallel laminated timber) are glue laminated, structural mass timber panels suitable for use as roof structures in medium density construction such as terraced housing.

Woodspan PLT panels are made from finger-jointed or whole timber boards that are then laminated into large panels. Boards are glued so that the grain runs parallel (in the same direction) to the primary span, creating a strong, structurally efficient panel.

Key Features
  • Fast Installation — Prefabrication of Woodspan PLT panels offsite using advanced CNC technology ensures fast and accurate installation, reducing labour costs and keeps material waste and construction noise onsite to a minimum
  • Thermal Performance — Woodspan PLT panels thermal resistance values range from R=0.75 to R= 1.17 dependent on PLT panel thickness used
  • Available in 90mm, 117mm and 140mm thicknesses giving multiple spanning options. Maximum panel size 7200mm x 890mm
  • Sustainable — Wood from renewable sources is the only truly sustainable construction material available. Wood acts as a carbon store — a vital tool in helping to combat climate change
  • New Zealand Made — Woodspan PLT panels are manufactured and fabricated in New Plymouth, Taranaki from 100% New Zealand Radiata pine logs from sustainably managed plantation forests
Structural Timber
FSC Certified
FSC Certified
NZ Made
NZ Made
NZ-Owned Business
NZ-Owned Business
Scope of Use

PLT panels are suitable for use as floor and roof structures including diaphragm applications:

  • In any wind zone or calculated wind pressure (ULS)
  • In all exposure zones, excluding microclimates as defined in NZS 3604:2011
  • In conjunction with a primary structure that complies with the NZ Building Code or where the designer has established that the existing structure is suitable for the intended building work
  • In all hazard classes up to and including H3.2
  • As a diaphragm where specifically designed
  • In applications where NZ Building Code Clause C6 (structural stability) obligations apply
  • Woodspan PLT Panels may be used with residential and commercial floor loadings up to 3.0kPa
  • Available in 90mm, 117mm and 140mm thicknesses giving multiple spanning options. Maximum panel size 7200mm x 890mm
Limitations on Use
  • Specific design required for fixing capacity where the wind zone is greater than extra high or the ULS is greater than 2.5 kPa
  • Fastening materials to be in accordance with NZS 3604:2011
  • Where uses a diaphragm the design of connections to bracing elements is subject to specific design
  • In applications where NZ Building Code Clause C6 (structural stability) obligations apply, the use of Woodspan PLT Panels is subject to specific design by a fire engineer
  • Floor loadings up to 3.0kPa — specified fixings to meet floor loadings and floor panel thickness
Statement of Building Code Compliance

If designed, installed and maintained in accordance with all Woodspan requirements, Woodspan PLT Panels will comply with or contribute to compliance with the following performance claims:

  • B1 Structure: B1.3.1 B1.3.2 B1.3.3 (a, b, c, f, i, j, m, q) B1.3.4 (a, b, c, d, e) — Verification Method B1/VM1, AS/NZS 1170:2002 set, AS/NZS 1328:1998 (parts)
  • B2 Durability B2.3.1 (a) B2.3.2 (a) — Acceptable Solution B2/AS1
  • C6 Structural Stability C6.2 C6.3 — Verification Method B1/VM1, NZS 3603:1993
  • F2 Hazardous Building Materials F2.3.1
Other Performance Attributes
  • Adhesive is Purbond, a Type 1, one component polyurethane adhesive in accordance with AS/NZS 4364 and suitable for all service classes
  • FSC [22/12/2020] Single Chain of Custody and Controlled Wood FSC-C006125
  • Grade Right NZ Ltd. [01/08/2020]. Grade Verified Engineered Wood Products QA Programme
  • Grade Right NZ Ltd [30/03/2019]. Member of Treat Right Programme
  • Grade Right NZ Ltd. [31/03/2019]. Member Certificate Producer Grade Verified Structural Timber
CAD Resources
Onsite Product Guide
PLT Design & Install Guide

December 2021

PASS Product Technical Statement


Environmental Product Declaration


Woodspan is a New Zealand owned manufacturer and fabricator of PLT mass timber panels and glulam engineered wood products for use in building and construction.

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