Ngenxa yezinto ezingavuthiwe noma indlela ezisetshenziswa ngayo, izitshalo zokuxuba i-asphalt zizoba ngaphansi kwezinga elithile lokugqoka ngesikhathi sokusetshenziswa kwansuku zonke. Uma zingalawulwa noma zingalungiswa ngesikhathi, zingagqwala uma sezihlangene nomoya, amanzi emvula, njll. isikhathi eside. Uma izingxenye zesitshalo sokuxuba i-asphalt zigqwalile kakhulu, impilo yesevisi kanye nokusebenza okujwayelekile kwayo yonke imishini izothinteka.

Ngakho-ke, kubaluleke kakhulu ukuthi izitshalo zokuxuba i-asphalt zenze umsebenzi omuhle wezokwelapha ezihlukahlukene ukuvimbela izingxenye zabo ukuthi zingagqwali. Ukuze ufeze lo mgomo, ngakolunye uhlangothi, lapho ukhetha izinto zokwakha isitshalo sokuxuba i-asphalt, izinto ezinokumelana nokugqwala okuhle kufanele zikhethwe ngangokunokwenzeka. Ngakolunye uhlangothi, kuyadingeka ukunciphisa ukugqwala kobuso bezingxenye ngokuhlukanisa umoya nezinye izindlela, futhi futhi kuvimbele ukulimala kokukhathala kwezingxenye, njengokuphuka nokucwecwa komhlaba.
Ukuze uvimbele ukwenzeka kwezinto ezingenhla, isigaba esithambile singakhethwa ukuze sihlungwe ngesikhathi sokukhiqiza; ukungena, ukucisha kanye nezinye izindlela zingasetshenziswa ukwandisa ubulukhuni bezingxenye; futhi lapho uklama ukuma kwezingxenye, umphumela wokunciphisa ukuhlela ukungqubuzana kufanele kucatshangelwe.