An expert group examining the Enhanced Defective Concrete Blocks Grant Scheme has warned that it "appears inevitable" that it will have to be extended to other counties.
Last November, the Government unveiled it's plan to support homeowners in Co Mayo and Co Donegal affected by Pyrite and Mica.
It is reported that work is also under way to determine if homes in Sligo, Clare, Limerick and Tipperary should be included.
However, an expert report published today warns houses in other counties may also be affected.
The extent of the problem is difficult to determine, and the experts say that if only a small number of homes are ultimately affected it shouldn't have "significant financial implications on current cost projections for the scheme".
It recommends that counties Sligo, Clare, Limerick and Tipperary should be included in the Defective Concrete Blocks Grant Scheme "with immediate effect" and that the legislation should allow for the possible extension of the scheme to other counties.
The Department of Housing is currently drafting legislation to give effect to the Defective Concrete Blocks Scheme.
This report and its findings will feed into that process.