Test results showed that increasing the percentage
replacement of natural fibers tends to reduce the density, compressive strength and flexural
strength of the materials. Fiber cement products mixed with coconut fiber yielded lower density than
that of oil palm fiber. The mixtures of fiber cement products containing up to 15% of both natural fibers
by weight of binder yielded the acceptable physical and mechanical properties. Furthermore, the thermal
conductivity of the natural fiber cement sheets was 60% less than that of the control specimen. The
results of this research can be used as a guideline for using agricultural residues to develop fiber cement
products for residential building applications.