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Long run vs fixed length short sheets

Submitted by Bruce Duncan on Wed, 30/09/2020 - 11:38am

Once upon a time, or in fact for most of the history of sheet metal roof and wall cladding, the stuff was not “long-run” at all.  Metal roofing has of course been around for a very long time.  The Romans used copper and lead sheet as roofing materials and copper roofing as shingles or seamed...

Gutter and Downpipe Design

Submitted by Bruce Duncan on Fri, 06/03/2020 - 11:25am

We often hear about internal gutters flooding.  This is not because they are inherently unsafe, it is because, using the Acceptable Solution, they are designed to fail!

On 1st November the updated Code of Practice section on Roof Drainage was released.  This was the most challenging...

Corrosion Test Site Project Update

Submitted by Bruce Duncan on Fri, 21/06/2019 - 12:31pm

Once upon a time all metal roofs were made of 10-foot galvanised steel and fixed with lead-headed nails. Then we had longrun metal roofing while over the late 1980s and 1990s we have seen quite significant changes in both substrates and fasteners. This includes the introduction of COLORSTEEL®...

Nailing Patterns for Corrugate

Submitted by Bruce Duncan on Tue, 04/10/2016 - 12:26pm

We have revised the requirements for fastener patterns in Corrugate. The current table in E2/AS1 is conservative at one end of the scale, and overstated at the other, and will be reviewed in line with the COP.

Use one pattern over the whole roof

...

Designing smart with profiled metal roofing.

Submitted by Bruce Duncan on Fri, 13/05/2016 - 5:21pm

 

It is easy when designing a building to leave the roof cladding until last; however, consideration should be made at the outset of design of the Kℓ pressure coefficient factors, which apply to roof cladding and the purlins at the periphery of all buildings.
Some engineers are now...

Green Building

Submitted by Bruce Duncan on Mon, 09/05/2016 - 2:04pm

NZ Green Building Council updates the Steel Credit in Green Star NZ to something achievable.

If you build upmarket offices, commercial buildings or schools this should mean something to you. If it does read on to discover how we have finally made the steel credit applicable to NZ made...

Proposed NZMRM Systems Guarantee update

Submitted by Bruce Duncan on Mon, 09/05/2016 - 2:34pm

Strategic Background

Recent and signalled changes in Law, around Builder liability, Council liability and Risk based consenting, have created a legal environment that is conducive to the development of an extended range of builder guarantees.

On the back of its...

Solar Energy Panels And Metal Roofing

Submitted by NZMRM Editors on Thu, 18/12/2014 - 12:00am

NZMRM has been involved in discussions about solar water heating panels before and has contributed to the MBIE G12/AS2 and “Solar Water Heaters - Guidance for suppliers, installers and building consent authorities – December 2009”. We have commented on the issues with these in at least one Scope...

Ventilation Of Attic Spaces

Submitted by NZMRM Editors on Thu, 26/06/2014 - 12:00am

It is said that money makes the world go around, but actually fashion is the driver, not only when talking women’s apparel but talking the building industry as well. A lot of house renovations are started just because it is ‘out of date’ or ’past its use by date’ or simply because it is ‘old-...

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