Start by creating a measuring template for marking the distance down the wall where to make the installation. Stick a small piece of crown molding up in the desired areaand make pencil mark on the bottom of it on the wall. Right now, take the measurement from your mark to the ceiling which indicates the dimension of your template.
Whole Ceilings are A Little Out of whack, Thus Refrain from Snapping a Line
Now pick up that small piece of wood and go around the whole room making little pencil marks with your template. Don't try to snap a line through because all ceilings are a bit out of whack and your molding will end up not meeting up nicely at the corners and splices. The template marking procedure will follow any faults found in your ceiling and automatically make adjustments.
Situate the Studs and Acquire a Brad Gun and Compressor
Your next procedure is to look for the studs on the wall. You can use a stud finder or plainly tap on the wall with a hammer and pound nails through to locate them. Make markers for all using a small pencil mark in the area where the crown molding will be installed. Also, rent an air compressor and brad gun because trying to hand nail crown molding while keeping it straight is impossible.
Well Sandable Caulk Brings ?Wonders?
Cut your splices 30% on the bias and set your miter for 30% as well. It entails some work but the end results will be perfect. Cut off 24 inch pieces when you reach a corner or a splice and use them for determining the best fit thru trial and error cutting. Finally, make sure that you have a patient helper to hold the other end during installation and make a point that you have sufficient stock of all purpose ?sandable?, not silicone caulk for consumption