ABSTRACT: Surface damages, in the building materials,are occurred due to the capillary water sorptionin many building especially historical building atthe Konya City and around. In this study,capillary water sorption potential of the naturaland artificial building materials which used onthe building in the Konya district are investigated.The variation capillary water sorption coefficientswith other index properties of these materials areresearched so that variation of amount ofcapillary water sorption is determined formaterial type,. Capillary water sorption potentialsare investigated, on the natural building stonessuch as andesitic tuff used on historical andactual buildings,, trevertine, limestone and granitewith artificial building materials such as gasconcrete, concrete and pumice concrete madefrom pumice sand with cement. All capillarywater sorption experiments are carried out onseven piece samples which taken from everymaterial with prismatic shape and samedimension such as 2 x 5 x 10 cm. In experiments.,capillary water sorption coefficients for gasconcrete, pumice concrete, concrete, andesitictuffr trevertine,, limestone, granite, werecalculated in kg/(nf..saat °`~ ) as 7.3, 3.6, 4, 2..9,,0.11 0.4, 0.08 respectively., It is consequence thathighly capillary water sorption coefficients ofandesitic tuff caused on wetting which occurredin the historical building.. In addition, regressionrelationships between capillary water sorptioncoefficient and other index properties of materialsis determined in this study