Spraying and backrolling drywall ceilings and walls is very important to having a quality finished product. There are several reasons to backroll your primer on drywall plasterboard to ensure adhesion to the surface and also to create a uniform pattern finish. it also hides minor perfections and allows an easier touch up to be done later. You also may find your drywall plasterboard manufacturer states they advise you to backroll for these reasons.
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