Trim Carpentry & Molding

Trim is fitted to walls that bow, floors that fall away and corners that are not ninety degrees. A mitre cut at forty-five degrees meets a corner that is actually ninety-three and opens on one side. The craft is in reading what is actually there — scribing to the wall, tuning the angle, backing out the cut — not in the nailing.

That is why trim is the fastest way to judge finish work. It is all visible, it is at eye level, and a gap that would be invisible behind a cabinet is the thing a buyer's eye goes to.

Finger-jointed pine and MDF both take paint beautifully and are the sensible default for most interior trim. MDF in particular will not move seasonally the way solid wood does, which matters in a climate that swings humid.

But MDF has one rule: keep water off an unsealed edge. A baseboard in a bathroom, a laundry, or anywhere that gets mopped hard is a good candidate for PVC or a cellular composite instead — it costs more, it looks the same painted, and it does not swell. Exterior and near-exterior trim is a different conversation again, where salt air and UV are doing the damage.

Cutting trim is fast. Preparing for it is not. Walls get checked for bow, blocking gets confirmed, long runs get planned so joints land where they are least visible, and returns get made rather than left open.

Then it is caulked and filled so paint lands clean, because trim and paint are one finish in the eye of anybody looking at the room. A perfect mitre with an uncaulked seam above it still reads as sloppy.