Mena kei roto koe i te umanga hanga whare, kei te whakaaro rānei koe ki te whakamātao i tō whare, kua rongo pea koe i te kupu "water vapor permeability" (WVP). Engari he aha rawa te WVP? He aha te hiranga o tēnei mea ina whiriwhiria ana ngā rauemi whakamātao?
Ko te uruhanga o te kohu wai (WVP) he mehua o te kaha o tētahi rauemi ki te tuku i te kohu wai kia haere. He mea nui te WVP hei whakaaroaro ina tae mai ki te whakamarumaru, nā te mea ka pā ki te mahi whānui o te whakamarumaru ki te pupuri i tētahi taiao o roto e pai ana, e penapena ana hoki i te pūngao.
Ka taea e ngā rauemi whakamarumaru he iti te WVP te ārai i te hanga makuku i roto i ngā pakitara me ngā tuanui o te whare. He mea nui tēnei nā te mea ka taea e te makuku nui te arahi ki te tipu o te harore me te kino o te hanganga i roto i te wā. I tētahi atu taha, ka taea e ngā rauemi he nui te WVP te tuku i te makuku kia puta, ā, he mea whai hua pea tēnei i ētahi wā e hiahiatia ana te whakahaere makuku.
Nā, me pēhea te whakatau i te WVP o ngā rauemi whakamahana? Ko te WVP o tētahi rauemi ka inehia i roto i ngā karamu mō ia mita pūrua ia rā (g/m²/rā) ā, ka taea te whakamātautau mā te whakamahi i ngā tikanga paerewa pērā i te ASTM E96. Ko ēnei whakamātautau ko te whakaatu i te rauemi ki ngā āhuatanga haumākū whakahaeretia me te ine i te tere o te rerenga o te mamaoa wai i roto i te tauira i roto i tētahi wā.
I te wā e whiriwhiri ana i ngā rauemi whakamahana mō tētahi kaupapa, he mea nui kia whakaarohia te āhuarangi me ngā whakaritenga motuhake o te whare. Hei tauira, i ngā āhuarangi makariri e hiahiatia ana te whakamahana i te nuinga o te tau, he mea nui kia whiriwhiria he whakamahana me te WVP iti iho hei ārai i te hanga makuku me te kino pea ki te hanganga o te whare. I tētahi atu taha, i ngā āhuarangi wera me te makuku, ko ngā rauemi he WVP teitei ake pea te pai ake hei whakatutuki i te whakahaere makuku pai ake me te ārai i te haukū i roto i te pakitara.
He maha ngā momo rauemi whakamahana kei te mākete, he rerekē ngā āhuatanga WVP o ia momo. Hei tauira, ko ngā rauemi whakamahana pahuka pēnei i te polyurethane me te polystyrene he iti ake te WVP, ā, he pai mō te whakamahi i ngā taiao makariri me te mākū. Ko ngā whakamahana cellulose me te fiberglass, he nui ake te WVP, ā, he pai ake mō ngā āhuarangi wera me te makuku.
Haunga ngā whakaaro mō te āhuarangi, me whai whakaaro anō hoki ki te wāhi me te whakamahinga o te whakamarumaru. Hei tauira, ko te whakamarumaru i roto i te rūma o raro, i te wāhi ngoki rānei, me whakamahi pea i tētahi rauemi he iti ake te WVP hei ārai i te makuku kia uru ki ngā pakitara turanga. He rerekē, ko te whakamarumaru o te tuanui ka whai hua pea i ngā rauemi he nui ake te WVP hei whakahaere pai ake i te makuku me te tiaki i te haukū.
Hei whakamutunga, he mea nui te uruhanga o te kohu wai (WVP) hei whakaaroaro i te wā e whiriwhiri ana i ngā rauemi whakamahana mō tētahi kaupapa hanga whare. He mea nui te mārama ki ngā āhuatanga WVP o ngā rauemi rerekē me te pānga ki te whakahaere makuku me te mahi whānui o te whare kia pai ai te noho o roto, kia penapena hoki i te hiko. Mā te whakaaro ki tō āhuarangi, tō wāhi noho, me te tono whakamahana, ka taea e koe te whakatau whai whakaaro mō te whakamahana pai rawa atu mō tō kaupapa.
Te wā tuku: 19-Pepuere-2024
