There is a latent sustainability and resilience movement in Rio de Janeiro's favelas. How can we recognize, strengthen, and catalyze this movement? Since 2000, Catalytic Communities (CatComm) has supported community initiatives in Rio's favelas. In 2012, we released the film Favela as a Sustainable Model http://bit.ly/FavelaModelo, and in 2017 we mapped more than 100 sustainability and resilience-building initiatives across favelas in Greater Rio http://bit.ly/RFSMapa. Now, we have launched the Sustainable Favela Network to strengthen these grassroots initiatives and generate knowledge exchanges, capacity-building, partnerships, and resources to strengthen this burgeoning movement. In September and October 2018, we organized exchanges among eight of the most established projects in the network: Onda Verde ("Green Wave") in Nova Iguaçu, Verdejar in Engenho da Rainha, Ecco Vida in Honório Gurgel, ReciclAction in Morro dos Prazeres, the Vale Encantado Cooperative in Alto da Boa Vista, Alfazendo and their Eco Network in City of God, the Camorim Quilombo, and the Sepetiba Ecomuseum. These exchanges are the subject of 'Weaving the Sustainable Favela Network.'