Damaging effect of mica, pyrite and pyrrhotite a worry for homeowners
The mineral muscovite mica has led to defects in building blocks used in at least 5,000 homes in the northwest, causing cracks to open up in many buildings. The Cabinet last year approved an enhanced scheme to cover repairs or rebuilding for affected homes. A number of homeowners in Donegal have also been alerted to the presence of pyrrhotite in their blocks, on top of mica. Pyrrhotite is a naturally…