Tegral is to invest more than €7m in its Athy plant in Co Kildare with the creation of 30 new jobs.
€2.1m is to be spent immediately on new machinery for the building materials and systems company while the remaining €5.3m will be invested in upgrading existing machinery and improving infrastructure over the next three years.
Ten of the jobs have already come on stream while the other 20 will be created in November.
The investment follows a successful tender by Tegral to supply fibre cement roof slates for the UK market.