Kev tsim tawv rau hauv qab yog qhov kev tsim kho uas tshwm sim rau hauv peb qhov kev tsim kho rau cov chaw tso tawv kub, ib qhov kev ua si thaum uas peb cov tshuaj siv rau kev tsim kho thermoplastic, tshwj tsis yog polyamide, tau raug sau ua cov duab ntau yam uas tshwm sim. Qhov kev tsim kho no pib los ntawm cov polymer tshiab lossis siv sijhawm nrog cov duab tawv, uas tau raug muab mus rau hauv qhov rooj kuaj. Thaum cov khoom no txav mus rau hauv qhov rooj kuaj los ntawm tus neeg ua haujlwm, nws tau raug sib tshooj nrog qhov kub loj los ntawm cov cuab yeej kub thiab cov zog loj hauv, uas tuaj yeem tshem cov polymer nyob hauv qhov chaw kub thiab zoo li dej. Cov polymer kub no tom qab ntawd tau raug npaj tawm los ntawm qhov rooj tsim tawv uas muaj kev tshuaj xyuas zoo, uas tso cov duab tawv rau sab xis ntawm cov chaw tso tawv kub. Thaum twg cov duab kub no tshwm tawm los ntawm qhov rooj tsim tawv, nws mus rau hauv qhov rooj kub, feem ntau yog ib qhov dej, uas nws tuag thiab tso nws lub teeb meem txaus siab. Kev sib piv zoo ntawm qhov kev tsim kho ntawm cov rooj tsim tawv thiab qhov xim ntawm cov rooj tso tawv yog qhov tseem ceeb; nws txhawis qhov thickness zoo ib yam thiab tso tsis pub muaj kev tshem tawm lossis kev txav. Peb cov kev paub ntau, uas tau muaj since 2006, pab peb daws qhov kev tsim kho no, kev lag luag ntau yam xws li saffron kub, xim ntawm cov neeg ua haujlwm, thiab qhov xim kub rau cov polyamide ntau yam no. Qhov no txhawis tias cov tawv tshwm sim muaj kev caij lwb zoo, kev tso kub zoo, thiab kev tso tawv zoo uas yuav tsum tau rau kev sib thooj zoo rau hauv cov systems aluminum fenestration nyob ze plig. Los ntawm Polywell, peb muab cov tawv thiab cov kev tsim kho tawv, muab ib qhov kev daws teeb meem uas txhawis qhov kualifikation los ntawm cov khoom siv mus rau cov khoom tiav.