10 Expert Tips for Hanging a Custom Mirror Over Your Fireplace

Mirrors above the mantel are a classic move but getting it right takes finesse. Whether it’s a framed rectangle, a clean-lined square, or a custom-size treasure, these 10 tips will help you nail the look, balance, and feel.

1. Know Your Scale

Think about the size of your fireplace and mantel. A mirror that’s too big or too small will throw off proportions. Aim for a mirror that’s about two-thirds to three-quarters the width of the mantel for a clean, balanced look.

2. Consider the Frame

Pick a frame that complements your room. A bold, chunky frame stands out against simple brick; a sleek black one blends in with modern stone. Custom-sized mirrors offer flexibility. Don’t be shy to match your exact space.

3. Mind the Height

An inch or two of overlap with the mantel works, or float it 4–6 inches above. If your ceiling is tall, raise it a little more. The goal: the mirror should feel grounded, not floating, but also not crammed.

4. Center It Right

Center the mirror over the fireplace opening, not over the entire mantel. Your eye naturally follows that focal point so align it there unless you’re going for full mantel coverage (like symmetrical decor on either side).

5. Secure It Solidly

Fireplace walls can be stone, brick, or tile. Use proper hardware such as brick anchors or molly bolts so your mirror doesn’t come crashing down. Heavy mirrors especially custom-sized, should be double-secured.

6. Account for Heat and Ventilation

Keep your mirror at least 6 inches above the mantel or relative to the firebox. Heat rises, and over time it can warp frame finishes or mirror glue. Leave enough breathing room.

7. Play with Reflection

Think about what you want reflected, maybe a chandelier or an art piece opposite the fireplace. A custom-sized mirror lets you tailor the height and width so it captures that perfect angle.

8. Layer with Style

Don’t just hang the mirror and leave it bare. Layer framed mirrors with art, sculptural objects, or tall candlesticks on the mantel. Match the mirror’s frame subtly with smaller elements (like photo frames or candle holders).

9. Test Before You Drill

Cut out craft-paper templates in the mirror’s shape and tape them above your fireplace. Step back and see how it fits the wall, mantel surround, and room vibe. Adjust height and position before committing.

10. Keep It Clean & Polished

Mirrors over fireplaces gather dust and finger smudges fast. Choose an easy-clean frame and glass. Wipe weekly to keep that crisp, reflective sparkle everyone notices.

Why These Tips Matter

For interior designers, remodelers, or home design pros, a mirror above the fireplace anchors your design and sets the tone for the whole room. Getting scale, placement, and framing right shows you’re detail-oriented. Plus, custom-sized mirrors let you create something special instead of grabbing off-the-shelf.

When you follow these tips, you won’t just hang a mirror, you’ll stage a focal point that brings warmth, depth, and personality to the space. And isn’t that what great design is all about?