Sharar gida ko tarkace kowane irin tarkace ne daga tsarin gini . Hukumomin gwamnati daban-daban suna da bayyanannun ma'anoni. Misali, Hukumar Kare Muhalli ta Amurka EPA ta bayyana kayan gini da rugujewa a matsayin “ tarkacen da aka samu yayin gini, gyarawa da rushe gine-gine, hanyoyi, da gadoji.” Ana ƙirƙira kayan gini da rushewa yayin aikin ƙirƙirar sabon gini ko tsari ko lokacin gyarawa ko rushe wani ginin da ake da shi. Wadannan kayan yawanci kayan aiki ne masu nauyi da ake amfani da su a cikin manyan kundin gini na zamani, kamar siminti, karfe, itace, kwalta da gypsum . Daga cikin jimillar sharar gida a Amurka, kimanin kashi 90% na fitowa ne daga rugujewar gine-gine, yayin da sharar da ake samu a lokacin gini ya kai kasa da kashi 10%. Sharar gida akai-akai ya haɗa da ƙananan abubuwa masu haɗari waɗanda ke buƙatar a zubar da su daban-daban fiye da yawancin sharar gini, kamar fitillu, batura, da sauran kayan lantarki.