A grant of two thirds of the approved cost, up to a maximum of 3,810 euro, is available. A higher level of assistance of up to 5,714 euro is available for houses on specified offshore islands. Householders with a medical card may be eligible for thatching grants up to a maximum of 6,350 euro (or 8,253 euro in the case of houses on the offshore islands). In such cases the grant may cover up to 80% of the approved cost of works subject to the maximum grant.

For conditions of eligibility and an application form please see:
http://www.housing.gov.ie/housing/grantsfinancial-assistance/thatching-grant/thatching-grants

Applicants can apply directly to:
Thatching Grants Section
Department of Housing, Planning, Community and Local Government
Government Buildings
Ballina
Co. Mayo
F26 E8N6