Supporting documentation to Determination 2017/88 (facade system fire spread)

Geoff Merryweather made this Official Information request to Ministry of Business, Innovation & Employment

The request was successful.

From: Geoff Merryweather

Dear Ministry of Business, Innovation & Employment,

With regard to
Determination 2017/088 (Regarding the code-compliance of a facade system proposed for remediation work to an apartment building at 12 Selwyn Road, Howick, Auckland )

Can you please provide the supporting documentation, calculations, reports or correspondence between the parties supporting the conclusions of Determination 2017/88, particularly,y in regard to fiber cement cladding as a rigid air barrier and timber framing.

Yours faithfully,

Geoff Merryweather

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From: *OIA
Ministry of Business, Innovation & Employment

 

Ref: 1718-0951

 

Dear Mr Merryweather

On behalf of the Ministry of Business, Innovation and Employment I
acknowledge your email of 30 January 2018 requesting under the Official
Information Act 1982 (the Act), the following:

·        Can you please provide the supporting documentation,
calculations, reports or correspondence between the parties supporting the
conclusions of Determination 2017/88, particularly,y in regard to fiber
cement cladding as a rigid air barrier and timber framing.

Your request is being processed in accordance with the Act and a response
will be sent to you in due course. If you have any enquiries regarding
your request feel free to contact us via email [MBIE request email] or using
the contact details below.

 

Yours sincerely,

Alan Witcombe

MANAGER, MINISTERIAL SERVICES

Corporate, Governance and Information

Ministry of Business, Innovation and Employment

Level 4, 15 Stout Street, PO Box 1473, Wellington 6140

 

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From: CLM Ministerial Services
Ministry of Business, Innovation & Employment


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Good morning Mr Merryweather,

 

In order to help us respond to your request can you please clarify what
information you are specifically seeking.  Determination 2017/088 made a
decision in respect of the fire compliance of the wall system as it is
described in the determination itself – the system, which was revised
during the course of the determination process, does not rely solely on
fibre cement sheet as the outer layer to the timber framing supporting the
high pressure laminate panels. 

 

The performance of the fibre cement as a rigid air barrier is a question
more related to Clause E2 External moisture: this matter was not in
dispute and the determination does not consider this clause.

 

We look forward to hearing back from you at your earliest convenience so
we can process your request.

 

You are welcome to contact Senior Ministerial Writer, Jackie Cooke, on DDI
(04) 901 1645, or [email address], to discuss this request
in person rather than replying through FYI.

 

Kind regards

 

Ministerial Services

Engagement, Communications and Ministerial Services

Email: [1][email address]

 

Ministry of Business, Innovation & Employment

15 Stout Street, Wellington, PO Box 1473, Wellington 6140

[2]www.mbie.govt.nz

[3]cid:image001.png@01D2A86C.030B1D00

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From: Geoff Merryweather

Dear CLM Ministerial Services,
1. i am looking fro the information that supports the conclusion that fibre cement RAB board on timber framing will not prevent fire spread up the building when part of a vented cavity with intersotrey firestops. The RAB is part of the facade system and this determination was about a vented cavity system whcih relied on the NFPA 285 full scale test for fire compliance. From the determination it appears the conclusion is that the timber framing is a concern and it will burn, even if covered by a fibre cement board of limited combustibility, causing fire spread up the building. What information supports the integrity failure of the fibre cement board,and fire spread?
2. Did the research behind th determination outcome consider alternative thicknesses or materials (such as Calcium Silicate boards)
3. The accepted outcome of a modified wall system had fire rated plasterboard under the fibre cement, but also has 13m fire rated plasterboard part of the inside wall lining. The Building Code recognizes the fire may spread up to 3.5m, hence is not concerned with spread up the outside wall of room of fire origin of an ordinary apartment.. Assuming the wall is not otherwise fire rated for other reasons (whcih is not clear in the text), is the fire rated plasterboard required as part of the determination conclusion? if so, then why? if the wall is not fire rated, it could be full height glazing with no limitations.
This has a significant impact on recladding costs of leaky buildings as there is now extensive remedial work inside the building, including removal of kitcehns, bathrooms, refitting showers and waterproofing etc whcih would not otherwise be required.
What is the conclusions based on - tests, referenced literature, expert opinions,etc.?

Yours sincerely,

Geoff Merryweather

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From: CLM Ministerial Services
Ministry of Business, Innovation & Employment


Attachment image002.png
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Attachment DOIA 1718 0951 Geoff Merryweather Response Letter.pdf
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Attachment 2017 088.pdf
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Attachment Expert s report Selwyn Ref 2976 22092017 RELEASED UNDER THE OIA.pdf
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Attachment Expert Addendum Report Selwyn Ref 2976 31102017 RELEASED UNDER THE OIA.pdf
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Good afternoon Mr Merryweather

 

Please find attached a response to your Official Information Act request
and associated attachments.

 

Kind regards

 

Ministerial Services

Engagement, Communications and Ministerial Services

Email: [1][email address]

 

Ministry of Business, Innovation & Employment

15 Stout Street, Wellington, PO Box 1473, Wellington 6140

[2]www.mbie.govt.nz

[3]cid:image001.png@01D2A86C.030B1D00

 

[4]www.govt.nz - your guide to finding and using New Zealand government
services

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