Description

This Certificate relates to three Lockwood wall systems:

1. The Lockwood 44 wall system consists of treated solid Pinus Radiata timber board, and is 44 mm thick
2. The Lockwood 62 wall system consists of treated solid laminated Pinus Radiata timber boards, and is 62 mm thick
3. The Lockwood 107 wall system consists of two layers of treated solid laminated Pinus Radiata timber board held apart by two structural plywood spreaders with a centre core of Polyisocyanurate (PIR) insulation, and is 107 mm thick

The boards have an effective cover of 172 mm and interlock to form a solid wall. All Lockwood Wall Systems incorporate vertical interlocking wall componentry, tie rods, subfloor base flashings, wall stiffeners, prefabricated corner connections, nailing beams, ridge beams and posts, as well as other ancillary items.

Lockwood 62 and Lockwood 107 are manufactured with a prefinished external outer face. The outer face finishes are available in powder coated aluminium, cedar and laminated Pinus Radiata. External walls incorporate aluminium joinery and all associated joinery flashings and wedges.

The Lockwood 107 wall system has a R value of 2.10 m²K/W.

Scope

1. The Lockwood wall systems are certified for use in buildings:

• a. within the scope limitations of NZS 3604:2011, Paragraph 1.1.2.
• b. situated in NZS 3604:2011 Wind Zones up to, and including, Extra High (55 m/s ultimate limit state wind speed) calculated in accordance with AS/NZS 1170.2:2011 (R2016) including amendment 1 to 5.
• c. located in all exposure zones described in NZS 3604:2011, Section 4.2, provided that the tie rods, fasteners and fixings used are selected for the exposure condition in accordance with the document Standard Specification for Lockwood Components (Issue No 17, 14.09.2023)
• d. more than 1 m from a relevant boundary, and
• e. In areas of buildings where a Material Group number of 3 or greater is required subject to being coated with Waterborne or solvent borne paint coatings, varnish or stain ≤ 0.4 mm thick ≤100 g/m2

2. Lockwood wall systems shall be designed, installed and maintained in accordance with the following set of documentation collectively reference as the applicable technical documentation:

• a. the Lockwood Detail Manual June 2024,
• b. the Lockwood Structural Handbook March 2015 (Issue 2, Version 4, 3/03/2015)
• c. the Standard Specification for Lockwood Components (Issue No 17 14.09.2023).
• d. the Lockwood Maintenance Schedule (Version 2, September 2018)
• e. the Lockwood Assembly Manual (Version 8, 2024)

3. Compliance of the building as a whole with H1.3.1(a) shall be determined by the schedule method of H1/AS1 or H1/AS2 as applicable or if parts of the thermal envelope are formed by 44 or 62 wall systems, the calculation method.

4. The 44 mm solid timber board contribution to Clause E2 is only in the limited situations where the walls are extended through to the external envelope or form a selected part of the exterior envelope. In these situations, the wall must be packed, insulated and clad in accordance with the Lockwood Detail Manual June 2024.).

5. All construction of Lockwood Design buildings shall be carried out and/or supervised by a Lockwood trained Licensed Building Practitioner.

6. The designer shall provide a signed Declaration for submission with the building consent application that the use of this product in the proposed building work falls within the scope of this certificate and that all design conditions of this certificate have been met.

7. The installer shall supply a signed Declaration that the product has been installed in accordance with the installation conditions of this certificate, for consideration for issuing a Code Compliance Certificate (CCC).