-
There should be firestops in that cavity behind the cladding so there are no voids bridging compartment floors (or walls but floors more important). That's pretty basic.
(The cladding itself should also not be easily combustible)
hoefla-
From what I can tell a large chunk of cladding people claim the cavity will be filled with insulation in such a way it's portrayed as solid and the cavity full which is clearly utter bs. I'm unsure but have a feeling claddings original uses as a temporary repair to a damaged wall dodge around some regs by placing it similar to scaffolding.
-
I think this is the specification of composite panel used on the building, it's PIR
https://www.celotex.co.uk/products/rs5000
Now look at the difference in performance between rockwool and PIR
Clockwise
marcomarcos
I've been over really dreary technical specs and info of some cladding in my old job. The main issue I could see with it is that usually the cladding has a gap of 1/2 foot or so between the main part of the cladding and the old outside wall, in a way it's like building a chimney along/around the outside wall as the heat from a fire will rise up inside the cladding ignoring the fire breaks of floor/ceiling rather than hitting the next floor up and the heat dispersing away from the outside wall into the air. The material the cladding is made of being flamable will make that loads worse but it's that awful design which does it more than anything.
It's well documented, google image search had a pic within a couple of results.
Using it for vanity is a growing and worrying trend, when you pair it with some other awful just barely legal ways of building you get a total deathtrap and sometimes a building that on paper ticks all the boxes but in reality doesn't give anyone a chance.
Hearing some truely awful stories come out, one that's going to stick with me is a baby thrown from a 10th floor window and survived but if the parents made it(or will survive the smoke inhalation) who knows.