Mounting a TV above a fireplace is usually safe, as long as the wall above the firebox doesn't get too hot during normal use, the TV sits high enough to clear the mantel and heat plume, and you've thought through viewing angle and glare before the holes go in. The risk isn't the fireplace itself — it's heat building up behind a TV that was never designed to run warm, which can shorten its life or void the manufacturer's warranty. A little testing before you mount solves almost all of it.
Is it actually safe to mount a TV above a fireplace?
Yes, for most GTA homes — but "usually safe" isn't "automatically safe," and that difference matters. Electric fireplaces and modern high-efficiency gas inserts tend to direct heat outward into the room rather than straight up the wall, which keeps the area above the firebox close to room temperature. Older masonry fireplaces and some open-hearth gas units push more heat upward, and that's where TVs placed too close to the mantel can run warmer than the manufacturer ever intended.
How hot does the wall above a fireplace actually get?
The honest answer is that it depends entirely on your specific fireplace, so the only reliable way to know is to test it. Tape a thermometer or a simple heat sensor to the wall where the TV would hang, run the fireplace normally for a couple of hours on a cold evening, and check the reading. Most TV manufacturers design their sets to tolerate everyday room heat, but a wall that climbs noticeably warm to the touch — well above normal room temperature — is a sign the TV spot needs to move higher, shift sideways, or get a heat deflector before anything is mounted.
How high above the mantel should the TV go?
There's no single number that works for every fireplace, because mantel depth, firebox size, and ceiling height all change the math — but as a starting point, most installers leave a healthy buffer above the mantel shelf itself, then check that the center of the screen still lands close to seated eye level rather than forcing the whole setup upward just to escape the heat. If the only way to get a comfortable viewing height is to sit the TV uncomfortably close to a hot mantel, that's usually a sign the room needs a different TV location altogether, or a tilting mount to angle the screen down toward seating rather than pushing it higher and higher up the wall. We cover how to balance height against comfortable sightlines in our TV mounting height guide.
Does glare and viewing angle change where the TV should go?
Often, yes — a fireplace wall is frequently the one wall in the room with the least control over natural light, especially in open-concept GTA living rooms with big windows facing the same direction. Mounting higher than eye level to clear a mantel also tilts the viewing angle downward from where people actually sit, which is exactly why a tilt or full-motion mount is worth considering on a fireplace wall even when a fixed mount would be fine elsewhere in the house. Angling the screen down a few degrees toward the couch undoes most of the discomfort that comes from mounting higher than ideal. Our guide to fixed, tilt, and full-motion mounts walks through which type fits which room.
Does a gas fireplace change the answer compared to an electric one?
It can. Gas fireplaces — common in older Toronto, Hamilton, and GTA homes, as well as many newer builds with decorative inserts — burn hotter and can push more heat upward than a built-in electric unit, which is designed from the start to sit near a screen. A gas unit doesn't rule out mounting a TV above it, but it raises the bar on testing wall temperature first and on adding a mantel or heat deflector to redirect warm air away from the screen. Electric fireplaces built for media walls are generally the lower-risk option if you're planning the room from scratch.
What else helps protect a TV mounted above a fireplace?
A physical mantel shelf or a dedicated heat deflector does most of the work by redirecting rising warm air outward instead of letting it wash straight up the wall behind the screen. Running the cables inside the wall rather than letting them dangle near the heat source also keeps wiring away from the warmest part of the wall cavity — our guide to hiding TV wires covers in-wall and surface options for a fireplace wall specifically. And because fireplace walls are often brick, stone, or poured concrete rather than plain drywall, the mounting hardware itself needs to match that wall type, not just the TV's weight.
If you're not sure whether your fireplace wall runs hot, or you want the height, hardware, and cable routing sorted out correctly the first time, that's exactly what NorthPros handles across Toronto, Hamilton, and the GTA — fully insured, with a workmanship warranty on every install, and you only pay once the job is done. Build a free quote, see what's included on the pricing page, or message us at 647-687-4110 if you'd rather talk through your specific fireplace before booking.
Frequently asked questions
Can mounting a TV above a fireplace void the warranty?
It can, if the TV runs hotter than the manufacturer's rated operating temperature for an extended period. That's exactly why testing the wall temperature during normal fireplace use, before mounting, matters more than guessing based on how the fireplace looks or feels from across the room.
Do electric fireplaces get hot enough to worry about?
Built-in electric fireplaces designed for media walls generally run cooler than gas or wood-burning units and are built with a TV placement in mind, so they're usually the lower-risk option. It's still worth checking the wall temperature after a few hours of use, especially on smaller electric inserts set to a high heat setting.
What if there's no good spot above the fireplace that avoids the heat?
Sometimes the better answer is mounting the TV beside the fireplace rather than directly above it, especially in rooms with a shallow mantel or a fireplace that runs noticeably hot. A full-motion mount can also help by letting the screen swing away from the heat source and back for viewing.
Does brick or stone behind the fireplace change how the TV gets mounted?
Yes — brick, stone, and poured concrete need masonry-specific anchors rather than the drywall or stud hardware used elsewhere in most homes, and the wall needs to be drilled carefully to avoid cracking the facing material. This is one of the most common reasons GTA homeowners bring in a professional for a fireplace install specifically, even if they've mounted TVs elsewhere themselves.
How long should I test the wall temperature before mounting?
Running the fireplace for a couple of hours under normal use, the way you'd actually use it on a typical evening, gives a far more realistic reading than a quick five-minute burn. Testing on the coldest day you plan to use the fireplace gives the most honest worst-case number for where the TV will sit.