TY - JOUR PY - 2021// TI - Burning behaviour of rainscreen façades JO - Journal of hazardous materials A1 - Jones, Nicola A1 - Peck, Gabrielle A1 - McKenna, Sean T. A1 - Glockling, Jim L. D. A1 - Harbottle, John A1 - Stec, Anna A. A1 - Hull, T. Richard SP - e123894 EP - e123894 VL - 403 IS - N2 - Four reduced-height (5 m) BS 8414-1 façade flammability tests were conducted, three having mineral-filled aluminium composite material (ACM-A2) with polyisocyanurate (PIR) and phenolic (PF) foam and stone wool (SW) insulation, the fourth having polyethylene-filled ACM (ACM-PE) with PIR insulation. Each façade was constructed from a commercial façade engineer's design, and built by practising façade installers. The ACM-PE/PIR façade burnt so ferociously it was extinguished after 13.5 min, for safety. The three ACM-A2 cladding panels lost their structural integrity, and melted away from the test wall, whereupon around 40% of both the combustible PIR and PF insulation burnt and contributed to the fire spread. This demonstrates why all façade products must be non-combustible, not just the outer panels. For the three ACM-A2 tests, while the temperature in front of the cavity was independent of the insulation, the temperatures within it varied greatly, depending on the insulation. The system using PF/A2 allowed fire to break through to the cavity first, as seen by a sharp increase in temperature after 17 min. For PIR/A2, the temperature increased sharply at 22 minutes, as the panel started to fall away from the wall. For SW/A2, no rapid temperature rise was observed.

Language: en

LA - en SN - 0304-3894 UR - http://dx.doi.org/10.1016/j.jhazmat.2020.123894 ID - ref1 ER -