Our jungle churches are designed with a steel structure and roof sheeting covered by hardwood planks for the floor and sides. The steel holds up better against the extreme elements of sun and rain--the structure itself will last 10-15 years versus the 3-5 years of building with just wood and palm leaves.
Because these communities are located deep in the river systems, all material has to be sent by boat. This leads to high fuel costs which account for nearly half of the total.
You may be wondering why such an "elaborate structure" so deep in the jungle? Why not just use wood and palm leaves like their homes are made out of? Why don't they just meet in someone's home? Well, the simple answer is because we want to build something that will last and requires little maintenance. The natural elements (rain, sun, insects) are harsh and deteriorate buildings rapidly.