On Sunday, June 18, 2017 at 12:25:10 PM UTC+1, Robin wrote:
On 18/06/2017 11:55, Andy Burns wrote:
The Natural Philosopher wrote:

Get some and put a blowtorch to it.
Celotex insulation does not really burn.

Where "not really" means that an external flame will make it burn,
giving off a surprising amount of smoke, it will char and and the flame
from the foam will sputter out after a few seconds when you take the
blowtorch away ... maybe a big slab with lower surface:volume ratio
performs better than tests on offcuts of an inch or two?


Celotex or Celotex FR5000? The former is Class 1, the latter Class 0.

Reynobond PE is Class 0 as well....


When I fitted Celotex in the loft here I reckoned that by the time a
fire had gone through the plasterboard into the loft I'd either be out
or dead. And that the Victorian rafters and joists would go up like the
proverbial in any event.

--
Robin
reply-to address is (intended to be) valid