Residential

Trim, Door & Molding Painting

Crisp, smooth trim and doors that frame every room with a professional finish

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| Trusted by Denver homeowners since 2024 | (720) 999-9725

Overview

Trim painting is the detail work that elevates a room from good to great. Fresh, crisp trim makes walls look better, rooms feel cleaner, and the entire home feel more polished. Baseboards, crown molding, door casings, window casings, and doors all benefit from quality trim paint applied with precision.

The key to great trim is using hybrid alkyd/acrylic enamel paint like Benjamin Moore Advance or Sherwin-Williams Emerald Urethane Trim Enamel. These products self-level for a smooth finish, cure to a hard, durable surface, and clean up with soap and water. In Denver's dry air, their longer open time compared to straight latex is critical for achieving brush-mark-free results.

Denver's low humidity creates specific challenges: paint skins over before it can self-level, caulk shrinks more than in humid climates, and doors can warp if edges are left unpainted. Understanding these conditions and using the right products makes the difference between professional results and visible brush marks.

Materials & Tools Needed

Paint and Primer

Trim paint (Benjamin Moore Advance, Sherwin-Williams Emerald Urethane, or ProClassic)
Primer (Zinsser BIN shellac for stain blocking, KILZ Adhesion for spot priming)
Paintable acrylic latex caulk (DAP Big Stretch for Denver's temperature cycling)

Brushes

2.5-inch angled sash brush (primary trim brush -- Purdy, Wooster, or Corona)
2-inch and 1.5-inch angled sash brushes for tight and detail areas
Small 4-6 inch foam rollers for flat door panels

Preparation

150-grit and 220-grit sandpaper and sanding sponges
Lightweight spackle or wood filler, putty knives
TSP or household cleaner for degreasing
Painter's tape (FrogTape) and masking film

Hardware Tools

Screwdriver set for removing door hardware
Zip-lock bags and labels for hardware organization

Step-by-Step Guide

Inventory and Assessment

Walk through and inventory all trim: baseboards, crown molding, chair rail, door casings, window casings, doors, closet doors, stair railings. Note condition and measure linear feet.

Select Paint and Finish

Choose semi-gloss or satin finish. Semi-gloss is traditional for trim (durable, wipeable). Benjamin Moore Advance or Sherwin-Williams Emerald Urethane are top choices for their self-leveling properties.

Clean All Surfaces

Wipe all trim with TSP solution to remove dust, grime, and fingerprint oils. Clean tops of casings and baseboards where dust collects. Rinse and let dry.

Remove or Mask Hardware

Remove door hinges, knobs, and window hardware whenever possible -- painting around hardware produces sloppy results. Mask walls along baseboard edges with painter's tape.

Surface Repair

Fill nail holes and dents with spackle. Caulk gaps between trim pieces and between trim and wall with paintable caulk. This caulking is what gives trim a finished, professional look.

Sand All Surfaces

Sand with 150-grit to degloss existing finish and create adhesion tooth. Use sanding sponges for profiles and corners. Vacuum and wipe with tack cloth.

Prime Where Needed

Prime bare wood, filler, and stained areas. Use shellac primer (Zinsser BIN) over previously stained wood to block tannin bleed that causes yellow staining through white paint.

Paint Doors

Remove doors and lay flat on sawhorses. For panel doors, paint panels first, then rails, then stiles, then edges. Use foam roller for flat surfaces and brush for edges. Apply thin coats. Two coats minimum.

Paint Crown Molding

Start at the top of the room. Use a 2-2.5 inch angled brush, cutting in along ceiling and wall lines. Follow the contours of the profile. Work in sections maintaining a wet edge.

Paint Window and Door Casings

Work from inside out -- paint edge closest to window/door first, then casing face, then outside edge. For double-hung windows: inner sash, outer sash, frame, then casing.

Paint Baseboards

Paint baseboards last. Use a 2-2.5 inch angled brush. Apply with smooth, even strokes in one direction. Use the "lay on, lay off" technique for a level finish.

Second Coat

Allow first coat to dry (16-24 hours for hybrid alkyd). Lightly sand imperfections with 220-grit. Apply second coat -- non-negotiable for opacity, depth, and durability.

Reinstall and Inspect

Remove tape, reinstall hardware, rehang doors and adjust hinges. Inspect under strong lighting and touch up with an artist's brush.

Denver Pro Tips

Hybrid alkyd paints are the best choice for Denver trim

Oil-based dries too slowly and skins over in dry air, causing wrinkling. Straight latex dries too fast, leaving brush marks. Hybrid alkyd (Advance) is the sweet spot -- self-leveling properties with latex cleanup.

Extend dry time on doors

Paint can start to skin within minutes in Denver. Work quickly, maintain a wet edge, and do not go back over areas that have started to set up. Advance gives 15-20 minutes of open time in Denver versus 30-40 in humid climates.

Caulk shrinks more in dry air

Latex caulk shrinks by releasing moisture. In Denver's 20-30% RH, caulk shrinks more than in humid climates. Use DAP Big Stretch and apply a slightly larger bead. Check and reapply the next day if gaps reappear.

Paint all door edges

In Colorado's dry climate, unsealed door edges absorb moisture at different rates, causing warping. Always paint all edges including the bottom edge -- moisture wicking through unpainted bottom edges is a leading cause of door warping.

What Affects Pricing

Linear feet of trim -- baseboards, crown molding, chair rail
Number of doors -- each takes 1-2 hours for a professional
Number of windows -- multi-pane windows take significantly more time
Trim condition -- heavy prep vs. light sand-and-paint
Profile complexity -- flat trim is faster than ornate multi-profile molding
Paint type -- hybrid alkyd ($55-80/gallon) vs. standard latex ($35-55/gallon)

Frequently Asked Questions

What is the best paint for interior trim in Denver?

Benjamin Moore Advance and Sherwin-Williams Emerald Urethane Trim Enamel are the top choices. Both are hybrid alkyd formulations that self-level for a smooth finish and cure hard. Advance has longer open time, making it slightly more forgiving in Denver's dry air.

Should trim be painted before or after walls?

Most professionals paint walls first, then trim. The trim brush work creates a crisp, clean line that serves as the final visual edge. Some pros prefer trim first. Either approach works if executed carefully -- the key is that the last thing painted creates the clean line.

How do I avoid brush marks on trim and doors?

Use hybrid alkyd paint with Floetrol to extend open time. Use a high-quality brush (Purdy, Wooster). Load one-third of bristle length. Apply with moderate pressure and the "lay on, lay off" technique. For door panels, use a foam roller for flat areas and brush only edges.

How long does trim paint take to fully cure?

Hybrid alkyd is dry to touch in 16-24 hours and can receive a second coat after 16 hours. Full cure (maximum hardness) takes 30 days. During this period, avoid scrubbing and close doors gently. In Denver, surface drying is faster but the oxidative cure follows the same timeline.

How We Can Help

Professional trim, door & molding painting is complex work that benefits from experience, proper equipment, and knowledge of Denver's unique climate conditions.

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