Several lines of inquiry are focusing on the the cladding system used. How flammable was the insulation? Were fire barriers in place? Did the gap between cladding and insulation help the fire to spread?

Faces and columns

of Grenfell Tower were

refurbished and

reclad in rainscreen

Area in

detail,

below

Residential floors

Communal floors

Cross section

Aluminium-

framed tip &

tilt window

Column face

Polyester

powder-coated

aluminium

rainscreen

Fire barrier

Thermal

insulation

Gap

Between

insulation and

panel

Original

concrete

structure