Trimming around a fireplace means installing a surround frame or trim kit to cover the gap between the fireplace unit face and the wall opening, creating a clean, finished edge without custom carpentry.

For an electric fireplace insert like the Masarflame Flemington series, a purpose-built trim kit is the most reliable approach. The trim kit mounts to the unit's face frame and overlaps the rough wall opening on all four sides, hiding uneven drywall cuts, masonry edges, or framing gaps. For a built-in or masonry fireplace, installers use non-combustible materials — tile, stone veneer, or wood mantel surround pieces rated for the required clearance distances.

  • Masarflame trim kits cover rough opening gaps up to 5.8 inches per side around the insert face.
  • Masarflame trim kits are model-specific and sold separately, sized to each insert's face frame dimensions.
  • Wood trim and mantels for gas or wood-burning fireplaces must maintain minimum clearance, typically 6–12 inches from the firebox opening per manufacturer specs.
  • Masarflame Flemington retro inserts have an overall width of approximately 35.6 inches, with the insert portion measuring 32.6–32.7 inches wide.
  • Electric fireplace trim installation requires no heat-rated materials since the unit's exterior surfaces stay cool during flame-only operation.

Step-by-Step

  1. Measure the rough opening and the insert face: Record the height, width, and depth of the wall cavity, then note the Masarflame Flemington insert face frame dimensions — 35.6 inches wide overall — so you know the exact gap on each side.
  2. Confirm the trim kit model match: Order the Masarflame trim kit sized for your specific Flemington insert; trim kits are not universal across the product line and won't seat correctly on a mismatched face frame.
  3. Slide the insert fully into the wall cavity: Push the Flemington insert into the rough opening until the face frame sits flush against the wall surface — the insert portion measures 32.6–32.7 inches wide, so verify it clears the opening before forcing it.
  4. Position the trim kit over the face frame perimeter: Align the trim kit so it overlaps the rough drywall or masonry edge on all four sides, covering gaps up to 5.8 inches per side without requiring you to patch the wall.
  5. Secure the trim kit to the face frame: Use the included fasteners to attach the trim kit at each corner and midpoint; check that the overlap is even on all sides before tightening fully.
  6. Inspect the finished edge and adjust as needed: Step back and confirm no raw drywall, masonry gap, or framing is visible; if a gap remains beyond 5.8 inches on any side, fill with a matching wall patch before the trim kit goes on.