The indoor air contaminations in the buildings are normally contributed by causes from humans, animals and air
borne fungi. These factors greatly cause the problem of sick building syndrome and indoor air pollutant. This study
was undertaken to discover the potential efficiency of biocide potassium sorbate to remediate the indoor air fungal
especially on wood material. Samples of fungal were collected according to NIOSH Method (NMAM 0800). The total
amount of fungi and bacteria were enumerated at 806 cfu/m3 and 280 cfu/m3, respectively in a lecturer’s room. The
study also revealed that the growth of fungi was at the minimum when incorporated with a biocide treatment according
to ASTM D559000 standard. This biocide has been proven to be effective and able to reduce the growth rate of indoor
fungi. Overall results showed that this type of biocide is effective to overcome the fungal problem on wood material
in the buildings.