Isimo sithetha i-cup foundation ukuze kusethwe. Umphakathi wabulawa nge-TPO flexible waterproof membranes, ubungakanani obuhle lokuhlala phansi kwemvula. Iziphiwo zomkhathalizi zibulawa ngamadipha angahlukene amashele angasihlanu ne-780mm, ukuba kuhlanganisiwe umfanekiso omncane nokuthi olunye.