The Department of Education has said that the remaining 13 schools to be assessed for structural defects can all reopen to pupils on Monday.
However, some external structural defects were discovered in five of the 13 schools and these will necessitate the installation of fencing and other protective structures around some external walls.
The schools which will require interventions are Griffeen Valley Educate Together, the Gaelscoil in Clonakilty, Cara Junior Special School in Cork, Carrigaline Educate Together, and Macroom Boys National School.
Some require fencing in only small areas of the school.
This brings to 23 the total number of schools found to have significant structural defects.
Forty-two schools were assessed.
Four out of the 23 have been forced to shut down significant sections of their school buildings.
Three Dublin primary schools can only use their ground floor, while Ardgillan Community College in Balbriggan has been obliged to close off an 18 classroom section of its school.
Ardgillan will be able to accommodate all students when schools reopen next week.
The three primary schools have made interim accommodation arrangements with other schools.
A significant number of pupils at two of these schools will have to be bussed to other locations.
Western Building Systems, who built the schools at the centre of the review over the last decade, has said each school involved was previously certified as being free from defects and suitable for use by the Department and its employed professionals.
It says it was invited to view only 14 schools during the assessment period and had insufficient time on site to make structural evaluations.
The company says some of the schools identified as now requiring remedial works are still in their defects liability contract period.
It says this provides for the contractor to remedy notified defects which the department identifies under the contract.
Some of the schools identified as now requiring remedial works were previously inspected and approved as compliant in line with the new building regulation control process, according to the company.
The company says it has written to the Department of Education requesting proper access to evaluate the identified schools, including Ardgillan Community College, Tyrellstown Educate Together National School and St Luke’s National School, Mulhuddart.
Western Building Systems has also written to the department and the Dun Laoghaire Education and Training Board regarding three schools that it is currently constructing - Greystones CNS, Colásite Cois Life and Shellybanks Educate Together National School on the Roslyn Park site in Sandymount.
The company says it is view that shortcomings in the regulatory system have been exposed.
