Does the silica in James Hardie products pose a danger after the product is installed?
No. The silica in James Hardie products does not pose any danger during handling or to the homeowner once the product is installed. Respirable silica only poses a potential hazard from James Hardie products during certain activities that create dust (e.g., cutting, grinding, drilling, sanding, or otherwise abrading) and only if excessive amounts of respirable silica are present in the user´s immediate breathing area. James Hardie products in their intact state do not emit dust.
