My timber cladding is arriving this week, with thousands of nails. But first prep still to do including holding down straps to my timber stud panels, rodent mesh to the bottom of the cavity, and fixing of intumescent fire cavity barriers. As my wall construction is timber stud panels with OSB sheathing and membrane, 50 mm cavity, then horizontal timber cladding on vertical 50 x 50mm battens, i am needing to maintain ventilation of the cavity for the back of the cladding from dpc to eaves. But i need to install ventilated cavity fire barrier horizontally at mid floor to compartmentalise, and possibly elsewhere.
Does anyone have experience in which barrier to use?
I'm supposing intumescent as it allows ventilation of the cavity, but the strips are really expensive, £20+/m