C2 Fire Resistant Timber Frame

[benben5555]

Hi,

 

I've been told by our fire risk assessor that we are going to need a C2 timber frame with fire resistant treated timbers and floors. This is because there are properties on either side of us within a few meters. 

 

Has anyone had experience of this or have any idea of the extra over costs. We've already got quotes for the timber frame but without any special treatments.

[ETC]

What is your outside skin made from. If it’s brick or rendered block you won’t have an issue with FR to the timber frame. You will be limited to the extent of glazing though depending on the distance of the external walls to the boundaries.

[Mr Punter]

Yes I have had this.  Extra costs were less than 5%.  It was for during construction fire risk. Some floor decks were fire resistant and some wall had Fermacell sheathing.  The TF supplier did all the calcs.

 

The project was a terrace with brick and block ground floor and timber frame above, max 4 storeys.  The fire engineering compartmentalises the space to reduce the radiant heat to adjacent buildings.  The end units had a double layer of Fermacell on the outside walls.  There are lots of ways to engineer this.  We just had normal JJI joists but the FR Caber flooring.

Edited September 6, 2022 by Mr Punter