Fiberglass imapereka maubwino okana dzimbiri, kulimbikitsa bwino, kukalamba komanso kukana moto, chifukwa chake amagwiritsidwa ntchito kwambiri pagawo lazamankhwala. Kugwiritsa ntchito: zombo zamankhwala, akasinja osungira, ma geogrids odana ndi corrosive ndi mapaipi.