A split bamboo lattice is a relatively weak structure that is built overhead in situ. Many families do not have the skills to build it.
Nepal Kosi River disaster 2008
A bamboo cane lattice is also not able to support loads. The roof edges are sharp and relatively difficult to attach the tarpaulins to.
The complete bamboo poles used for the RSK roof are a load bearing frame. The side poles are smooth along their length with no sharp edges making it easier to securely attach the tarpaulins.
Further disadvantages of bamboo lattice roofs include:
# it is difficult for families to create ventilation gaps at eaves level due to the sharp edges of the roof edge.
# the roofs are often constructed relatively low to the ground due to it being necessary for the builders to be able to reach them from the ground.
# the combination of these first two points and a need for privacy when the eaves are at eye level often results in there being no gaps created for ventilation and the potential for serious health problems.
# split bamboo and thin canes are more combustible than complete bamboo frames. This together with the difficulty of rapidly disassembling this type of roof to create fire breaks increase the fire risks with this type of shelter.
# roofs are slow to build, taking many hours, compared to the minutes it takes to build the RSK roof frame, important in inclement weather in an emergency.