The reason is that they are too short.
How to weave palm fronds into a roof.
Weave another palm frond back and forth vertically through the horizontal fronds.
Repeat this process with five more palm fronds making a woven sheet of palm fronds.
Instead you want to use cahune palm.
First they collect a whole bunch of nice coconut palm leaves which are all over the island.
Normally we don t use palm leaves for our cabana roofs.
Place three palm fronds onto a flat surface lining them up long edge to long edge.
Place three palm fronds onto a flat surface lining them up long edge to long edge.
Repeat this process with five more palm fronds making a woven sheet of palm fronds.
So here s your step by step instruction for making a palm thatch roof.