When putting up dry wall, is it necessary to sand the the joint compound between each coat?
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You need to sand the areas that are inconsistent between coats. Be carefull not to "burn" the paper tape. If you sand over the tape you have created more work for yourself. Mix the mud thoroughly before you apply even add some water to make the application smooth. First coat you use a 6" knife next coat an 8" hopefully 3rd and final a wide knife 10 or 12". I sand between coats because any bump or trash in the previous coat will continue to the last. Also there will be air bubbles in the first coat, If you try to final coat the mud and sand at the end , you will have little "holes" where you sanded.Take your time, prep is the key to a good job.
No. You want the next coat to have that bit of rough texture to grab onto.
(Sand when all the coats of joint compound are done and dried).
Same reason you have to rough up glossy painted surfaces before you repaint; better adhesion.
no, when applying joint compound do it neatly leaving no big lumps keep it smooth being neat applying it means less sanding at the end
NO..it's not necessary to do that.
Put the amount you need on coat after coat and then when you have ywhat you want...then sand it down and complete the job.
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