Buildings Regs B4 fire safety,Todays silly question.

[Post and beam]

From my TF supplier i have the following line.....

'External cladding as per details and in accordance with manufacturers recommendations'

 

Ground floor is brick clad outside of  Sips panels, first floor is Hardie board weatherboard. I believe the Hardie board is inherrently fire safe.

 

So where the Hardie literature makes great claims about its fire safety , does this satisfy the line above 'External cladding......?

 

I am trying to understand whether fire barriers are additionally required around the perimeter of the Hardie cladding.  The brick work has ( will have) fire barriers.

[Gus Potter]

1 hour ago, Post and beam said:

From my TF supplier i have the following line.....

'External cladding as per details and in accordance with manufacturers recommendations'

 

Ground floor is brick clad outside of  Sips panels, first floor is Hardie board weatherboard. I believe the Hardie board is inherrently fire safe.

 

So where the Hardie literature makes great claims about its fire safety , does this satisfy the line above 'External cladding......?

 

I am trying to understand whether fire barriers are additionally required around the perimeter of the Hardie cladding.  The brick work has ( will have) fire barriers.

Good post.

 

To provide a bit of context. I'm an SE and Architectural Designer.

 

Everyone is trying to cover their arse. It's not that they are bad folk, most are great designers and know their subject.. but the insurer's are going nuts. The fire stuff has major implications. I've spent lots of time negotiating with my SE insurer about what exposure I need for fire safety.

 

@ETC how is that going for you? I'm trying to explain to Buildhub folk how this works.. can you reciprocate?

 

Next you have building control sheading all liability in terms of anything to do with fire.

 

You have bit it of a journey ahead of you.

 

Best thing you can do is post good constructional details on BH.

 

A word of warning.. if you want good advice then post all the info you have. I'm like many other folks on BH here that are willing to give you a bit of pro bono advice. If you make me guess then I will bin you.

 

 

 

 

 

 

Edited February 12 by Gus Potter

[Mr Punter]

11 hours ago, Post and beam said:

I am trying to understand whether fire barriers are additionally required around the perimeter of the Hardie cladding.

 

Maybe.  If you need to compartmentalise the walls, say at each floor or junction with a garage, you may need fire barriers.  With a ventilated rain screen system this is sometimes at odds with the need for ventilation behind the cladding.  Vertical barriers can be done cheaply with rockwool socks but sometimes you may need expensive intumescent horizontal barriers.  It is difficult to find definitive information on what is needed where and how to install it.  It just gets left to "others".

[saveasteading]

It's too complex to give a quick answer.

I did a fire course, and used to submit innovative design solutions but bco's tend not to accept them any longer. So it has to be a standard detail or by a Fire Engineer.

Your supplier should tell you this.