Carpentry
Baseboard and Crown Molding Installation Guide
Updated September 2026
Baseboard and Crown Molding Installation Guide: the direct answer
Baseboard and crown molding installation requires accurate measuring, careful cuts, stable fastening, aligned joints, gap filling, caulking, sanding, priming, and finish painting. The quality of the final result depends on both carpentry accuracy and the preparation used to hide transitions between trim, wall, and ceiling.
Where gaps come from
Uneven walls, out-of-level floors, seasonal movement, and inaccurate cuts can create visible gaps.
A complete finish
Install, fill, sand, caulk, prime, and paint as one coordinated scope instead of treating paint as an afterthought.