He is best known for his pioneering work in passive solar building design with the Trombe wall, which bears his name.
[3] In 1949 Trombe directed the construction of the experimental 50 kW Mont-Louis Solar Furnace in the Pyrénées-Orientales for high temperature experiments in physics and chemistry.
He was also one of those who worked on the creation, in 1948, of the underground laboratory of Moulis, a unit of the CNRS responsible for studying cave Troglofauna.
From 6 to 12 August 1947, he took part in the explorations of the underground river of Padirac Cave with Guy de Lavaur and his son Géraud, Jean Lesur and Louis Conduché.
In 1947, he directed the exploration operations of the Henne Morte chasm, future link in the Réseau Félix Trombe, with the support of soldiers who install an electric cable.