Fire Stop Locations for Timber frame with external cladding

[HanleeHouse]

Hi All, 

 

I'm about to start the external of my timber frame build which is a mix of Stone and render. Stone sections on 38mm battens, and render on 38mm cross battens. All then covered in 12mm cement board to apply the final finish. 

 

I've been racking my brain regarding the fire stops. I'm aware that the 38mm / 76mm timber around openings is sufficient. However, it's the horizontal fire stops that I'm questioning. I've seen some have used intumescent strips top and bottom of the cavity, others one strip between floors. 

Please could I ask what you have done on your builds? Also, do I need them on the single story side sections, or just the two story?

I've attached my elevations for reference. 

Many thanks appreciate your help. 

David 

PL-003 Proposed Elevations.pdf