A new gas fireplace insert looks unfinished until it has a proper surround framing it. On this Calgary project, we built a custom surround from MDF: a clean, modern frame sized exactly to the insert and the wall it sits in.
Why MDF
MDF (medium-density fibreboard) is stable, smooth, and free of knots and grain, so it doesn't warp or crack the way solid wood can near a heat source. It machines to crisp, square edges and gives a perfectly even base for whatever finish goes on top, whether that's paint or, as in this case, decorative plaster.
Building and test-fitting the frame
The surround is measured off the actual fireplace opening, not just the spec sheet. Pieces are cut on the mitre saw and assembled into a single frame, which we dry-fit against the wall to check proportions and clearances before anything is fastened.
Installing on the wall
Once the fit is right, the frame is set around the insert, leveled, and fastened securely to the wall. We work around the full perimeter to keep the reveal around the firebox even and the joints tight, because on a clean modern design any gap or step shows right away.
What's next
With the surround installed, the fireplace already looks like a finished feature instead of a box in the wall. The next step is a decorative plaster finish over the MDF for a seamless, textured look. We'll share how that turns out in a follow-up post.
Planning a fireplace upgrade or a custom feature wall? Get a free quote and we'll help you work out a design that fits your space.