Spraying Rockwool Insulation bLack?

[The Natural Philosopher]

The very ordinary kind

That's the way asbestos was sold for years too.

>

[Mr Sandman]

It's for a home cinema/critical listening i.e. Pseudo audiophile kind of li stening.... Actually now thinking of stringing a sheet of geotextile across ceiling joi nts instead of fitting a ceiling, stapling every joist and blowing the wool in cavity fill style from the loft space. This will result in a very ligh t fill which is ideal for absorbing the lower frequencys. Then board over t he lot in the loft making it a useful space and then when I am happy with t he sounds, covering it all in a nice fabric for the essential WAF.

[Mr Sandman]

Done some Sketchups-

Voids to fill-

Add some colour-

First reflection points-

Steve

[Dave W]

Surely dyeing would be better than dying?

[harry]

Glass wool is definitely dangerous. Mineral many well be.

[Robin]

Do you actually read before you post? I don't see any "may well be" on that page. I do see:

" In contrast, the more commonly used vitreous fibre wools produced since 2000, including insulation glass wool, stone wool, and slag wool, are considered "not classifiable as to carcinogenicity in humans" (Group

3)."

and

"The European Certification Board for mineral wool products, EUCEB, certify mineral wool products made of fibres fulfilling Note Q ensuring that they have a low biopersistence and so that they are fast removed from the lung. The certification is based on independent experts? advice and regular control of the chemical composition

Due to the mechanical effect of fibres, mineral wool products may cause temporary skin itching. To diminish this and to avoid unnecessary exposure to mineral wool dust, information on good practices is available on the packaging of mineral wool products with pictograms or sentences. Safe Use Instruction Sheets similar to Safety data sheet are also available from each producer.

People can be exposed to mineral wool fibers in the workplace by breathing them in, skin contact, and eye contact. The Occupational Safety and Health Administration (OSHA) has set the legal limit (permissible exposure limit) for mineral wool fiber exposure in the workplace as 15 mg/m3 total exposure and 5 mg/m3 respiratory exposure over an 8-hour workday. The National Institute for Occupational Safety and Health (NIOSH) has set a recommended exposure limit (REL) of 5 mg/m3 total exposure and 3 fibers per cm3 over an 8-hour workday.[10]"

If you think someone DIY-ing a ceiling will come anywhere near exceeding those limits then you must think they are an idiot who is eg going to shred rockwool with an angle grinder in a box room without a mask. (Now what made me think of someone stupid enough to do that?)

Do you realise that is archive material from the early 1990s? (A clue is that it includes "This proposal is due to be discussed in 1991 and national measures are unlikely before late 1992.") Since then there's been more research. Hence the stuff I last used had

"ROCKWOOL mineral wool is not classified as dangerous according to EU Directives 67/548/EEC and 1999/45/EC and its amendments (Regulation (EC) No 1272/2008) on classification, labelling and packaging of substances and mixtures"

[The Natural Philosopher]

There are other ways of dying than cancer you know.

asbestosis is not cancer.

Have you ever breathed it in, or had it get into bare skin?

Or ended up with an abcess the size of a hens egg from dirty strands getting rubbed into the skin?

[tabbypurr]

both those links conclude there is no hazard.

NT