Run TV Cables Above a Fireplace




Introduction: Run TV Cables Above a Fireplace

A flat panel TV above your fireplace is very cool until you try and hide the cables.  The fireplace prevents running the cables straight down the wall and the stud framing prevents running the cables laterally inside the wall.  If your fireplace is on an interior wall, you may be able to go up the wall, however, that doesn't work on exterior walls.  The top plate of the wall blocks access to the attic and the roof prevents drilling down from above.

The typical solution is to cut access holes in the walls and run the cables.  In our older home, the walls are wood paneling which has been covered in heavy wallpaper and painted.  Not an easy thing to repair without obvious blemishes remaining.  A second option is to use the mantel to hide the cables and that is the option I chose.  To my amazement, this worked very well.

This instructable will show you how to use a board, a hinge and a magnet to run cables down to the floor (left of fireplace).  I also discuss alternatives to accomplish the same thing without using a hinge.  Hopefully, this will provide you with some good ideas for your home.

FYI.  I love this new 50" Panasonic plasma smart tv.  Under $1000 and the picture is fantastic!

Step 1: How This Works

This picture shows how the cables are hidden in the mantel piece.  The hinge on the old barn wood opens a door for access to the cables.  The cracked and worn nature of the wood makes the door virtually invisible as it appears to be a split in the wood.  There are other ways to accomplish the same effect without using a hinge and I'll discuss those options as we go along.  

Before you decide to install a TV above your fireplace, it is advisable to place a thermometer above the mantel and make a fire.  Monitor the temperature over an hour or so and make sure it does not exceed 90°F.  If the temperature remains below 90°F, it is safe to mount a TV above your fireplace.  It is also advisable to check your local codes for running cables.

You will also need to use a stud finder and mark the location of the wall studs.  The wall stud locations will determine where you will make the wall holes for access.  This is especially true for the hole near the edge of the fireplace as this is a common place for a single or double stud.  In my case, there were 2 studs to the left of the fireplace which I had to drill through but that wasn't really a problem.  

Step 2: Attaching the Hinge

The first step is to find a big chunk of  barn wood (chunk size may vary) or whatever wood you prefer.  This chunk is a rough cut 2x4 from our old barn which measures a full 2" x 4" and is 8' long.  Since my fireplace is 6' wide this board worked well after a bit, or a lot, of clean up.  

Determine the distance from the end of the board to the point where your cables will be coming down the wall.  You'll want to locate your hinge a few inches further from the end of the board to accomodate the cables.  It's easiest to attach the hinge prior to cutting the access door and then remove it.  In this way, you know the holes are drilled so the edges of the door line up with the rest of the board.  I didn't have any rusty screws so I spattered some new ones with brown metal primer and flat black paint from spray cans.     

Step 3: Cutting the Access Door

To cut the door I used my tablesaw and jigsaw.  Other choices would be a bandsaw or hand saw.  I made the initial cut down the length of the board on my tablesaw at around 3 1/2" high.  I finished the cut along the top edge of the mantle piece with a jigsaw because the blade is much thinner.  This made the door gap unnoticeable. 

I'm guessing most of you aren't planning on using barn wood and hinges to hide your TV cables so here's a few alternative plans.  My original idea was to use two 3/4" thick boards which both ran the entire length of the mantel.  One board would be fastened to the wall and the front board would be held by rare earth magnets to the rear board.  Magnets would be counter sunk and glued in one board and metal washers counter sunk in the other.  When finished, the front board would simply snap into place and could be easily removed when necessary.  The boards could have a variety of appearances from plain 4" boards to fancy trim boards.

A third option is to simply cut a groove in the wall itself and cover it with a piece of trim.  This is possibly the easiest technique, however, you will not be able to easily access the cables without removing the trim.  Considering the likelihood that we would be running additional cables in the future, I opted for having access to the cabling via a door.

Step 4: Cutting the Channel

Drill two 3" holes at either end of the rear board where the cables will enter and exit the channel.  I opted to make the holes as large as possible since strength was not an issue.  This was especially true for the hole at the end of the board since I knew I would need to drill laterally through some studs.  Using a jigsaw, make 2 parallel cuts between the holes to create a 1 1/2" wide channel.  I also added a 3/4" board along the bottom to provide additional height.

Step 5: Installing the Mantel Board

Before you start this step, make sure you have marked the location of all the wall studs.  This allows you to make your access holes between the studs and not over them.  It also tells you where to place your nails for fastening the board to your wall.  Additionally, know where the edges of your TV will be so the access hole is completely hidden by the TV.  It kinda defeats the purpose if it's not;)

Set your mantel board on the mantel and trace the circles as a drilling guide on to the wall.  I drilled 2 1/2" holes.  Pic 2 shows the hole I drilled through the double stud on the left side of the fireplace.  This hole was made with a 1 1/2" spade blade.  Thankfully, the bit was long enough.  Next, secure the mantel board to the wall using nails placed into the wall studs.

Step 6: Pulling the Cables

Last but not least......pulling the cables.  The trick is getting the first pull string in place.  To do this I used a stack of rare earth magnets, a bolt with washers, and a bend piece of aluminum to pass the bolt & washers through the hole in the double studs.  Aluminum is nice as it is nonmagnetic and won't interfere as you work.  

The magnets make short work of running the first string since you can guide the bolt & washers down the wall to your exit hole.  The toughest part was passing the bolt & washers through the wood studs and placing them between the wood paneling and the insulation inside the wall.  If you are working on an interior wall, this won't be a problem as only exterior walls are insulated.  Overall, it wasn't very difficult to place and guide the string down to the exit hole near the floor.

Once you have your first string run, tie multiple strings to it and pull them back up to the mantel top.  How many cables you plan to run will determine the number of strings to pull.  In my case, I pulled 5 strings for 3 HDMI cables and one power cord.  The 5th string will remain in the wall for future use.  

Next, pull your cables one at a time.  What worked well for me was to tie the string securely behind the plug and then cover the cable end with electrical tape.  This helps the cable follow the string and eliminates any edges on the plug which might get hung up.  Make sure you have your other strings secured so they do not get pulled along with the cable.  It is a good idea to tape the extra strings to the mantel with packing tape.  Pull all necessary cables and secure the remaining pull string in the wall for future use.

Hook up your TV and you're done!  I hope this instructable was helpful and sparked some ideas for running cables above a fireplace.  
Thanks for checking it out and I look forward to your comments and suggestions for improvement.



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13 Discussions

Hello. What kind of cable/wire you use for the power line to the TV? do you use a standard romex NM-B? or you have to use High Temperature or something to protect from interior temperature around the chimney?

1 reply

Our fireplace is more for show as we rarely use it. That said it's not close to the chimney itself and I used an extension cord. Certainly not code. Ideally installing a wired outlet would be better.


1 year ago

Sorry I forgot to paste the link to the website

Did you have any problem mounting your TV above the fireplace? Did you hit hardyboard or anything like that?

1 reply

Thanks!!! you article is very useful but I have a question in my mind can I also use the "recessed media box" near the fire places to hide all the cables ?? as I thinks that the hole and the cables doesn't look good in your living room. Please advice me regarding this!!!

1 reply

Thanks for sharing the use of magnets to guide the string behind the wall. This will come in handy for some projects we have planned.

Many people install tvs like this, but you'll get a stiff neck with it that high. It's generally accepted that a tv should be close to eye level of your normal viewing position, (typically sitting on the couch). My 42" tv is on a pivoting wall mount(so I can reach the ports) and is centered at about waist level. I built a wooden coffee table sized cabinet that fits under it with 6 shelves for all the AV components.

Snaking an appliance AC line cord through a wall cavity is a violation of the National Electric Code. See NEC article 400-7, uses not permitted for flexible cable. You can snake the low power wiring but you need to install an AC receptacle behind the TV. There are low profile specialty boxes made for this purpose. Probably not going to burn the house down but it is an unrated, probably Chinese made, cable run behind a fireplace - just saying...

1 reply

Thanks for the heads up. I thought that was pretty shaky myself but wanted to get the TV up. Super Bowl deadline. Exactly why I left that extra pull string.

I REALLY like the idea of using strong magnets to guide strings through walls. I have always used a duct tape on a coat hanger wire for short wire rune, but this could be useful in tricky and unusual situations. I second the importance of leaving at least one additional string in the wall along with the wires you install since you will invariably need to install other ones in the future. I have been able to use only ONE string when pulling multiple wires since I always make sure that the string is at least twice the length needed on the "non-pulling" end. I pull that string through and then attach the wire to be pulled mid-way along that extra long string. Once the wire pulled through and then disconnected from the string, the string can then be pulled back through the first hole to allow for other wires to be pulled through the same way. When you are finished with your wire pulling, leave the "extra long" string in place for future use.

1 reply