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This Old House - How to Paint a Room Like a Pro | Ask This Old House

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Short Summary

Main recommendation: paint a room in sequence, starting with the ceiling, then the trim and window sash, then the walls, and use liquid masking instead of painter's tape to protect the glass. The video also recommends semi-gloss for trim and eggshell for walls, pouring paint into a small container rather than working from the can, and adding a paint additive to keep trim paint from running into window frames.

Key Points

  • Work in order: ceiling first (already done), then trim and window sash, then walls, with baseboards painted as part of the trim/second coat stage.
  • Use liquid masking on the window glass instead of painter's tape; the presenter says it avoids paint on the glass and saves scraping time.
  • Choose finish by use: semi-gloss for trim (easy to clean, durable), eggshell for walls, and avoid matte in high-traffic areas because it is hard to clean.
  • Pour paint into a small container rather than working from the can, to avoid letting dust or a breeze get into the can and ruin the paint.

Details Worth Noting

  • Concrete instructions:
    • Ceiling first, then trim, then walls.
    • Liquid mask: apply to the glass with a brush. It goes on white and dries clear; apply a second coat once the first is dry, and remove it with a razor knife once the paint is done, lifting one end and peeling.
    • Pour paint into a small bucket or container; do not work out of the can.
    • Add paint additive to the trim paint so it does not run thick into window frames, then mix gently.
    • Load the brush by dipping only about two fingers' depth into the paint.
    • Paint the window: start at the top corner, use long, smooth strokes with light pressure, working down.
    • Place a putty knife against the jamb while painting the sash edge to avoid getting paint on the jamb.
    • Trim: use a 1.5-inch brush for the window sash, and a 2.5-inch brush for the side of the trim as well as the chair rail and door casings; keep the brush parallel to the wall, and use one long stroke down, then paint the face.
    • Walls: roll with a 9-inch microfiber roller using eggshell.
    • Baseboards use the same semi-gloss as the trim, since they are part of it.
    • Finish: apply two coats of each product, letting the first coat dry before the second.
  • The finishes described: high gloss and semi-gloss are hard to apply but easy to clean and best for doors and trim; satin has less sheen, is easier to apply, but is less durable and popular for cabinetry and some trim; eggshell is flatter and suits walls and plaster; matte has no sheen, is hard to clean, and is poor for high-traffic areas.
  • The presenter notes that painter's tape is not needed for professional-level work, and liquid masking is preferred because paint on glass otherwise requires scraping.

Bottom Line

Painting a room well depends on sequence and protection: trim and windows first with liquid masking, then walls, and matching finish to surface use.