Kwamitin baya yana taka muhimmiyar rawa a cikin rufin thermal da hana ruwa. Don rufewa, allon goyan baya yawanci yana da takamaiman matakin zafin zafi, yadda ya kamata ya hana canja wurin zafi. Tsarinsa na ciki yana samar da rufin rufi, yana rage musayar zafi tsakanin gida da waje, ta yadda zai rage yawan kuzarin gini. Alal misali, a cikin hunturu mai sanyi, yana rage asarar zafi, yana kula da zafi; a lokacin zafi mai zafi, yana toshe canja wurin zafi daga waje, yana kiyaye cikin gida sanyi. Don hana ruwa, allon goyan baya yana aiki azaman shamaki don hana shigar danshi. Yana toshe ruwan sama, ruwan karkashin kasa, da sauran danshi daga shiga ginin, yana kare tsarin daga zaizayar ruwa. Alal misali, a cikin rufin rufin ruwa, allon goyon baya yana hana ruwan sama daga shiga cikin gidan; a karkashin kasa waterproofing, yana toshe ruwan karkashin kasa shiga. Bugu da ƙari kuma, allon goyan baya yana haɓaka cikakken kwanciyar hankali da dorewar gini. Kyawawan kariyarsa na ruwa da kaddarorin zafin jiki yana rage lalacewa ga tsarin ginin da ya haifar da danshi da canjin yanayin zafi, yana tsawaita rayuwar sabis. A lokaci guda kuma, ga wasu wuraren da ke da buƙatu masu girma a kan zafi da zafin jiki, irin su ɗakunan ajiya, ɗakunan injin, da dai sauransu, kayan aiki na thermal da aikin hana ruwa na allon tallafi na iya haifar da yanayi mai dacewa da muhalli don waɗannan wuraren da kuma kare abubuwan da aka adana da kayan aiki daga lalacewa.
