The Lake House of Úlfljótsvatn has been hosting an international volunteering program since it began in 2015. Every summer, the IFA hosts volunteers for five months (May to September) to plant trees for carbon sequestration, assist local forestry associations in maintaining their forests (path-making, building timber infrastructures, branch cutting), and learn about environmental improvement and climate change action.

The program started under the ERASMUS+ initiative of the European Commission, through the European Voluntary Service (EVS) which became the European Solidarity Corps (ESC) in 2020. In January 2022 the IFA received a Quality Label for its ESC volunteering project. This label certifies that we carry out high quality solidarity activities in compliance with the principles, objectives and quality standards of the European Solidarity Corps. Obtaining a Quality Label is a precondition for leading European volunteering programs. We lead this project in cooperation with Rannís - The Icelandic Centre for Research which manages the European grants and fundings in Iceland for the European Commission.

The IFA has also welcomed short-term volunteering groups with other organizations in the past such as Working-Abroad, Worldwide Friends (Veraldavinir) and Seeds Iceland. The only program currently active however is the ESC volunteering program.