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BSP01 Replacing Secret Fixed Trough Section at a 1° Pitch

Submitted by marius@aptwrite.nz on Wed, 18/06/2025 - 3:19pm

Roof replacement with a “like with like” does not require a building consent (Exemptions Guidance for Schedule 1 of the Building Act 2004, Fifth edition August 2020).

Version 2, 4 March 2024

Re-Roofing at 1 Degree.pdf

Bulletin BA01 Required Temper for Aluminium Cladding

Submitted by marius@aptwrite.nz on Thu, 29/05/2025 - 12:01pm

The temper and the alloy affect the tensile strength of aluminium cladding, which affects both point load and distributed load performance.

Version 1, 11 February 2025

 

BA01-Required_Temper_for_Aluminium_Cladding.pdf

Bulletin BGC01 Pre-painted Metal Wall-Ground Clearance

Submitted by marius@aptwrite.nz on Thu, 29/05/2025 - 11:44am

Durability, rather than weatherproofness, motivates metal wall-to-ground clearances. Clearances are designed to prevent the build-up of vegetation or debris, which can be corrosive.

Version 1, 29 February 2025

BGC01_Ground_Clearance.pdf

Bulletin BC01 Clearance Between Sheet ends and Transverse Flashing

Submitted by Alex Taylor on Fri, 30/08/2024 - 4:24pm

Clarifying recommendation for clearance between the bottom of the sheet end and tranverse flashings.

Version 1, 23 April 2024

BC01_Clearance_Between_Sheet_Ends_and_Transverse Flashings.pdf

Bulletin BU01 Double Laying of Underlay on Re-Roof

Submitted by Alex Taylor on Fri, 30/08/2024 - 4:19pm

Recommendation for double laying underlaying when reroofing.

Version 1, 19 March 2024

BU01_Double_laying_of_Underlay_on_Re-Roof.pdf

Bulletin BDL01 Double Lapping Roofing Sheets

Submitted by Alex Taylor on Fri, 30/08/2024 - 4:08pm

Clarifying when the use double lapping.

Version 1, 13 June 2024

BDL01_Double_Lapping_Roofing-Sheets.pdf

Bulletin BV01 Cavity Batten Protection

Submitted by Alex Taylor on Fri, 30/08/2024 - 4:01pm

Department of Building and Housing advice on cavity battens.

Version 2, 25 February 2025

BV01 Cavity Batten Protection (V2.0).pdf

Bulletin BSCE01 Cut Edge Treatment

Submitted by Alex Taylor on Fri, 30/08/2024 - 3:49pm

Guidance to minimise cut edge corrosion.

Version 1, 29 February 2024

BSCE01-Cut_Edge_Treatment.pdf

About Bulletins

Bulletins are summaries clarifying information in the NZMRM Metal Roof and Wall Cladding Code of Practice.

Available in PDF format, they can be used to support project documentation.

Scope 60

Submitted by Nathaniel Duncan on Mon, 26/08/2024 - 11:37am

PROJECTS

10: Baxter's House: A Waiheke Island Home in Flaxpod Matte, designed by Strachan Group Architects.

16: Makuch Home: Jason Kraayvanger's design features a twisted roof pitch, in Dimond Roofing's DD400 and Heritage...

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