Most drywall finishes are too time consuming to finely finish. A rough coat followed by a secondary and possibly a third is what a drywall finisher likes to do and still walk away with money. A spray texture is then coated over the entire drywall finish to hide minor inconsistencies in successive coats left by the finisher. This is especially true for the ceiling, as it is harder and more time consuming to finish due to the height.
A good drywall finisher works hardest on the eye popping details and pays less attention to obscure or hidden locations, allowing the spray texture to hide any minor defects. Prior to spraying any drywall with texture, ensure a good finish has been achieved and all defects have been finished.
Preparation Plenty of lightweight plastic and painters tape are needed for coverage. Overspray from a spray hopper can seriously damage anything you don’t want texture on. Windows and doors are a must, while carpet and tile can be covered by a heavy drop cloth. Take away any electronic equipment, furniture or anything else you don’t want joint compound all over, it does get very messy!
Mixing the mud Mixing joint compound is easy when you have the right tools. A 3/8 drill and elongated paddle bit are essential for the mixing process. A plastic bucket and water do the rest. Popcorn, glitter, sand and other three-dimensional materials can be added at this time and mixed. You are trying to achieve the consistency of runny pancake batter. Once you have it mixed, get ready to pour it into the spray hopper.
Test spray Now that your mix is ready, add a tiny bit of water into the hopper and spray it through the rig outdoors. Now pour in a quarter hopper full of mud. Test spray a piece of scrap drywall. Adjust the nozzle on the front of the spray hopper until you get the desired pattern by tightening the nozzle for a finer spray and loosening the nozzle for a thicker spray. Once you’re ready, take the spray rig indoors.
Even coats Now that you’re ready, spray the heaviest textures first, followed by the lighter textures. For instance, a ceiling usually receives a knock-down lace texture and is very heavy. You would start here first. The walls are typically coated with and orange peel texture and is very light. It should be last.
Apply in even coats by trying to overlap each coat in random layers. In other words don’t make a bunch of overlapping lines. Once you’re confident it’s going well, fill up the hopper to the brim and spray away. When you’re done, cleanup is a snap. Turn on the hose and spray out water through the hopper until the cloudy, joint compound saturated water runs clean.