Cov nkhaus yog qhov tseem ceeb ntawm kev txhim kho thiab txhim kho qhov muag tsis pom kev. Cov cim tuav tuav cov qhov muag pom kev ruaj ntseg hauv qhov chaw xav tau, txawm tias nws yog phab ntsa, qhov rai thav duab lossis qab nthab. Lawv muab cov kev ruaj ntseg thiab kev txhawb nqa, tuav cov dig muag nyob rau hauv qhov chaw thiab tiv thaiv lawv los ntawm sagging lossis poob. Muaj ntau hom nkhaus, xws li sab hauv cov nkhaus sab hauv, uas tau siv los ua kom tiav kev sib xyaw ua ke hauv lub qhov rais sib tsoo; sab nrauv mounting nkhaus, uas muab cov kev pab ntau dua sab nraum lub qhov rais thav duab; thiab cov nkhaus nthab, uas tau siv rau mount blinds mus rau saum qab nthab saum toj no. Los ntawm kev txhim kho cov nkhaus kom raug thiab ruaj khov nrog cov ntsia hlau lossis lwm qhov chaw ua haujlwm zoo, cov neeg dig muag nyob hauv qhov chaw zoo thiab kho cov qhov muag tsis pom kev raws li xav tau.