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Batman

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#223732 15-Oct-2017 09:44
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Spoke to an architect (from another country) who said lifespan of such cladding is about 15 years.

 

Would anyone buy these sort of houses?


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sleepy
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  #1883713 15-Oct-2017 09:56
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Mine was built 13 years ago cladding is fine just wish we had up graded the insulation

 

we live in Dunedin and does get some salt from sea

 




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  #1883722 15-Oct-2017 10:14
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I like really the look. A friend has one and their only complaint is it can be a bit noisy in heavy rain or hail. Their home is about 12 years old and they have had no problems with it.


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  #1883725 15-Oct-2017 10:42
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I lived in a workers cottage that had this. It is over 100 years old. You can still see it at 205 Aro Street, Wellington. No problems.




scuwp
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  #1883726 15-Oct-2017 10:58
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Sounds like the architect has no clue about NZ cladding. Installed properly and looked after it should last 50+ years. Just look at the corrugated roofs and how long they last.




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gzt

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  #1883728 15-Oct-2017 11:20
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Batman:

Spoke to an architect (from another country) who said lifespan of such cladding is about 15 years.


In NZ this material has been in use for a long time. I'm aware of unpainted galvanised roofing just coming up to end of life after 50 years, and there are older examples here and there.

netspanner
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  #1883729 15-Oct-2017 11:24
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The guy has no idea about the lifespan of NZ roofs, which is 30 years at least. I would like it as a no fuss way of cladding.


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  #1883731 15-Oct-2017 11:28
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Perhaps there's confusion about required durability under the Building Code B2 and feasible life. Non-structural cladding is only required to have a durability of >15 years.


 
 
 

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gzt

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  #1883732 15-Oct-2017 11:29
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sleepy: Mine was built 13 years ago cladding is fine just wish we had up graded the insulation

Dunedin I'm guessing cold issues not hot issues : ). The cladding is thermally conductive compared to wood, perhaps a higher grade of insulation should be specified to compensate.

I was considering a similar project some time ago and considered a nitrile rubber as a thermal break between the timber stud and the iron. If that mod complies with the building code I'm not sure

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  #1883734 15-Oct-2017 11:37
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You have to keep a track of how the material has changed over time. Apparently the old corrugated iron had twice as much Zinc on the weather side as the modern equivalent.

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  #1883736 15-Oct-2017 11:43
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Sixty years ago my Dad built the family home and clad it with Metalcraft weather board, which was basically the same galvanised iron sheeting material as used for corrugated iron roofing but pressed to a shape that looked like traditional weather boards.

 

About 2 years ago he decided to replace the cladding and at the same time installed insulation in the walls. The cladding was still in good condition when it was removed.

 

I'd say there's every chance you'd get 80 to 100 years out of corrugated iron presuming it was installed correctly.





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Batman

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  #1883961 15-Oct-2017 20:08
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cadman:

 

Perhaps there's confusion about required durability under the Building Code B2 and feasible life. Non-structural cladding is only required to have a durability of >15 years.

 

 

Thanks, that could have been where they got 15 years from.

 

So i take it concrete and brick is very long lasting

 

vs hardy board type boards (is this even allowed as the sole cladding now?), corrugated iron, less durable?


  #1883964 15-Oct-2017 20:19
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hardy board is fibre cement, and is still commonly used, as are timber weatherboards.


Batman

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  #1883966 15-Oct-2017 20:26
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Technofreak:

 

Sixty years ago my Dad built the family home and clad it with Metalcraft weather board, which was basically the same galvanised iron sheeting material as used for corrugated iron roofing but pressed to a shape that looked like traditional weather boards.

 

About 2 years ago he decided to replace the cladding and at the same time installed insulation in the walls. The cladding was still in good condition when it was removed.

 

I'd say there's every chance you'd get 80 to 100 years out of corrugated iron presuming it was installed correctly.

 

 

That bit worries me a little bit.


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  #1883995 15-Oct-2017 20:42
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Bung: ... Apparently the old corrugated iron had twice as much Zinc on the weather side as the modern equivalent.

Indeed. Used to be "hot-dipped", now electroplated so fewer atoms thick :-)

 

Zinc protects even cut edges to a degree (by sacrificial corrosion). One would want some assurance about this (cut edges) aspect re eg the modern zincalume[RTM].


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  #1883997 15-Oct-2017 20:48
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lapimate:

 

Bung: ... Apparently the old corrugated iron had twice as much Zinc on the weather side as the modern equivalent.

Indeed. Used to be "hot-dipped", now electroplated so a few atoms thick :-)

 

Zinc protects even cut edges to a degree (by sacrificial corrosion). One would want some assurance about this (cut edges) aspect re eg the modern zincalume[RTM].

 

 

Let me get this straight - that means the new ones are not as durable as the olden ones?


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