Kev ua tau zoo ntawm lub ru tsev ua haujlwm yuav tsum ua tau raws li cov haujlwm hauv qab no thaum tau txais kev faib ua haujlwm:
1. Txheej dej tsis muaj dej yuav tsum tsis muaj dej lossis txia.
2. Cov ntaub ntawv siv hauv kev tsim vaj tsev ru tsev yuav tsum ua tiav cov qauv tsim thiab qauv tus qauv zoo.
3. Qhov saum npoo ntawm leveling txheej yuav tsum du thiab dawb ntawm xoob, xuab zeb thiab tev.
4. Lub cev ntom nti, cov ntsiab lus ya raws thiab pom kev ntom ntom ntawm txheej rwb thaiv tsev yuav tsum ua tiav cov qauv tsim.
5. Cov qauv ntawm cov khoob khoob, eaves gutter, flashing thiab deformation joint yuav tsum ua raws cov qauv tsim.
6. Cov txheej txheem paving thiab lapping cov txheej txheem ntawm cov coiled yuav tsum ua raws li cov qauv tsim, qhov ceg tawv qhov dav yuav tsum yog qhov tseeb, qhov sib koom ua ke yuav tsum nruj, thiab yuav tsis muaj qhov tawv ncauj, ntsej muag thiab ntug ntug.
7. Lub cev tuab ntawm txheej txheej tsis ua dej tsis zoo ntawm cov txheej yuav tsum tau ua raws cov qauv tsim, thiab txheej yuav tsum tsis pub tawg, pob yas dhau, ntws, bubbling thiab raug qhov loj.
8. Qhov saum npoo ntawm cov txheej uas tsis muaj dej tsis sib haum yuav tsum ncaj, daim qhia hnub hli thiab pub dawb los ntawm cov xuab zeb, tev thiab tawg. Txoj kev sib faib yuav tsum ncaj thiab nyob hauv qhov chaw yog.
9. Lub qhov ncauj ntawm kev sib khi yuav tsum sib khi nrog lub hauv paus ntawm ob sab, thiab ntu kev sib khi yuav tsum du thiab ncaj yam tsis muaj kev tawg, sib tsoo thiab poob.
10. Lub hauv paus chav ntawm cov vuas vov tsev yuav tsum nyob ncaj thiab ruaj khov, cov vuas yuav tsum tau ua kom zoo raws li qhov ncaj thiab ncaj, ceg tawv sib koom tes yuav tsum tsim nyog, cov pob qij txha yuav tsum nruj, thiab yuav tsum tsis muaj cov nplais tsis tiav.
