Has anyone come across this type of insulation before? while making the parents extension, we discovered it in the walls and attic. the property was built around 1973 and I wonder if this was a typical insulation to use then. I was working on the new doorway today and the insulation was falling out of the exposed cavity. I was wondering what type it was and elderly mother just said 'Oh, thats kapok!'. she is not a builder and I was amazed she had any idea. is she right? it is very light and fluffy but with a slight roughness to it.
Google mentions kapok as an insulation but not for housing.