Can wool fibres be harmful and should I wear protective equipment?
Wool fibres are not harmful in any way. Recent concern about minute mineral and glass wool fibres being absorbed by the body through the lungs has prompted a number of countries to distinguish certain insulation materials as potentially carcinogenic. Materials of this nature are typically 1-4 microns thick (one-four millionth of a metre), but wool fibres are 30+ microns which are much too large to be hazardous. No protective clothing or equipment is required to handle or install wool insulation.
