How to undertake crown moulding

Mark the walls and ceiling

Run masking tape around the walls and ceiling so that about 1/2 in. of the tape will be covered by the rail trim. Mark the rail positions with a chalk line. Locate studs and ceiling joists.

To determine how much moulding to buy, measure each wall, round up to the next foot, and mark those measurements on a plain-view sketch of the room you're working in. If one wall measures within a few inches of the length of a full piece of crown, buy the next longer length. When the wood arrives at the site, number the back of each piece with a pencil to correspond with the numbers indicated on your plan-view drawing.

Get professionals on to it! Brown moulding can make sure a room looks great but don't undertake it yourself.