Lapho uthenga isitshalo sokuxuba i-asphalt, abasebenzi bezobuchwepheshe bomkhiqizi benza izikhumbuzo ezibalulekile mayelana nezidingo zokugcotshwa kwemishini, kuhlanganise nokugcotshwa kwengxenye ngayinye, engenakunakwa. Mayelana nalokhu, abasebenzisi baphinde bakhe izindinganiso eziqinile zokuzilawula, ngale ndlela elandelayo:
Okokuqala, amafutha okugcoba afanelekile kufanele afakwe njalo engxenyeni ngayinye yezitshalo zokuxuba i-asphalt; ngokwenani lamafutha okugcoba, kufanele igcinwe igcwele. Isendlalelo samafutha echibini lamafutha kufanele sifinyelele izinga lamanzi elishiwo yizinga, futhi akufanele libe ngokweqile noma libe lincane kakhulu. Uma kungenjalo, kuzothinta ukusebenza kwezingxenye; ngokwezinga likawoyela, kufanele lihlanzeke futhi akufanele lihlanganiswe nokungcola okunjengokungcola, uthuli, ama-chips, nomswakama ukuze kugwenywe ukulimala ezingxenyeni zesiteshi sokuxuba itiyela ngenxa yokungagcobi kahle.
Okwesibili, amafutha okugcoba ethangini kufanele ashintshwe njalo, futhi ithangi kufanele lihlanzwe ngaphambi kokushintshwa ukuze kugwenywe ukungcoliswa kwamafutha amasha. Ukuze zingathintwa izinto zangaphandle, iziqukathi ezifana namathangi kaphethiloli kufanele zivalwe kahle ukuze ukungcola kungangeni.