Insulating girazi, inozivikanwawo segirazi-layer girazi, inoshanda kumadziro ekunze ezvivakwa.Iyo inoreva iyo yekutsigira dhizaini sisitimu ine humwe deformation kugona kana ichienzaniswa neiyo huru dhizaini, asi iyo girazi dhizaini sisitimu haigovani huremu kana mutoro chimiro chechivakwa uye muviri mukuru.Ndiwo madziro ekuvaka, ayo anonyanya kugadzirwa nekaviri-layer girazi ine insulation uye inonzwika