Menu

Technical

Corrosion

The NZMRM Corrosion Project.
Stuart Hayman & Stuart Thomson

In 2012 the NZMRM Technical Committee launched a most challenging, expensive and exciting piece of research into the causes of corrosion of metal roof and wall cladding systems and how to minimise its effects. The MRM...

Insulation

by Stuart Thomson

In this third article of the series Stuart Thomson looks at the effects that modern ideas about insulation are having on what we see as a serious problem in complaints of “leaking” and “condensation”. Since the last article we have had a couple of meetings with...

Ventilation

The Roofing Industry is currently seeing a significant increase in complaints of “leaking” and “condensation”
especially in systems like skillion roofs and curved roofs. NZMRM and underlay manufacturers believe the answer lies in increasing what is currently the non-existent ventilation of...

Noise Attenuation By Metal Roofs

Stuart Hayman, March 2012

In October 2011 we updated you on the next stage of the noise through roofs technical project. The Acoustics Research Group of the University of Canterbury did some research for NZMRM to determine the
attenuation of road traffic noise through various roof...

Waihohonu Hut Tongariro National Park

By Graham Hepburn

Wellington firm Pynenburg and Collins Architects has designed about 70 tramping huts for the Department of Conservation (DoC) in the past 11 years. And in that time they have created a manual for huts that accommodate up to 40 people, including standard designs for...

Noise Control Project

Update on Noise Control Project

Stuart Hayman Oct 2011

From 2006/7 some metal roofs in Auckland were required to have plywood sarking installed underneath in high road traffic zones. This was in the belief that metal roofs without plywood would allow the noise transmitted into...

The Underlay Dilemma

Metal roof and wall claddings contribute a lot more to buildings than just keeping the water out. They are part of the moisture management of the building and a necessary part of the regulatory system as required by the NZBC.E3 (internal moisture).

This article is the first of three which...

Stainless Steel Fasteners

Stuart W.Thomson
Building Consultant

In the last year or so we have seen an increase in demand from BCAs for the use of stainless steel screws in Zincalume® roofs in severe environments.This is partly based on their interpretation of NZS 3604, which of course is...

Fletcher Synergies At Work

The new Laminex building in Penrose is testament to what can be achieved when Fletcher companies work together. Work began in May 2010 and was completed in December 2010 in time for a fresh start to 2011 for Laminex staff.


Dimond supplied the Roofing and Cladding product for the...

Quality Of Imported Coil Coated Steel

Note: Dave Hall, Chairman, MRM Technical committee. Whilst the results from the samples tested showed that the best result was achieved by NZ made painted steel and the least durable was from an imported sample, we should not draw the conclusion that all NZ made products are better and all...

Waitangi Gateway

“Staff at the Waitangi Treaty Grounds now have the space and facilities to welcome and engage with every visitor individually,” commented Waitangi National Trust...

Forgotten Lessons Of The Past

Following the Christchurch earthquakes, engineering experts have recommended replacing heavy tile roofs with lightweight metal roofing.Inspections revealed that extensive damage was caused to houses by chimneys falling...

Buckling Of Roof Flashings

BUCKLING OF ROOF FLASHINGS
Rod Newbold (Commercial Manager, Steel & Tubing Roofing Products),John Turner (Wood Technologist, SCION)

THE PROBLEM.
There has been a spate of compression buckling of transverse roof flashings, such as ridges, aprons, and apex...

Stockton Mine Coal Handling And Processing Plant

Mother Nature throws up plenty of issues on this project. Article supplied coutesy of Jenny Bain. Rooflink

Stockton Mine in Buller, New Zealand’s largest opencast coal mining operation, has been a site of coal extraction since the late 1870s. Located high on a plateau...

Putting It To The Test

Putting it to the test

Whilst most home owners have “blind faith” in their roofs staying put during storms there is considerable research and testing done by NZ manufacturers to ensure their products comply with local and off shore conditions. The MRM has invested in...

Sustainable Water

There’s little doubt that water is one of the planet’s most valuable commodities and maintaining water supply will become even more important if predictions about the dire consequences of global warming become true.

If the planet is going to be subjected to the extremes of flooding and...

Bent But Not Broken

CHRISTCHURCH QUAKE SEPTEMBER 4TH 2010

This personal report by Stuart Thomson highlights the validity of the claim previously made in Scope that light metal roof cladding not only can save money but can save lives as well. Heavy tile roofs did not fare well but metal roofs were bent but...

What Is The Problem With Unwashed Areas?

Article by Stuart Hayman and Stuart Thomson

Designers have usually many other priorities to concern themselves with than details about unwashed areas, however the purpose of this article is to raise awareness of this potential problem. The description of an unwashed area...

Structural Cost Savings. Lightweight Vs Heavyweight Roofing

It is generally accepted that structural framing requirements for a lightweight roof are less than for a heavyweight roof and can result in cost savings.

The degree of these cost savings is often debated, so the NZMRM engaged an independent consultant to look at the savings that could...

Avoiding The Problem Is Easier Than Finding It

Stuart Thomson, recognised for his vast knowledge on the use of metal and principle author of the COP illustrates the benefits of using the COP. How it can save endless hours in tracking and solving problems that should just never happen with “best practice”. As illustrated the time and cost...

The Hazards Of Attachments To Metal Roofs

Metal roofing has been used extensively in New Zealand for over a hundred years. In certain locations (even some exposed situations i.e....

Valley Drainage

The Capacity Mystery solved

By Stuart Hayman & Stuart Thomson.

Stuart Hayman has been involved with metal roofing for many years and until recently was Technical Development Manager for AHI Roofing Ltd. He is now a Roofing Consultant and is Chairman of the Technical Committee...

Gutter Leaf Protection Systems

A solution or a problem?

In recent years there have been a number of products launched onto the market which claim to prevent the blocking of gutter or spouting by leaves. There are two types - one which fits into the gutter, for example like a brush, and those which are...

New Building Regulations

Acceptable Solution E2/AS1 External Moisture

Improvements in building products, designs and processes over a number of years have contributed to better built environments. The 2004 Building Act was intended to regulate for the continuation and enhancement of this...

Pages