How to Install Glass Fireplace Doors


Glass fireplace doors are an essential component of fireplace safety. Closing the glass doors allow you to exit the room without fear that flying embers might ignite your carpeting or upholstery. Most new fireplaces come equipped with glass doors, but older fireplaces might not include that feature. Fortunately, most fireplace door kits are designed for simple installation by experienced do-it-yourselfers.

Things You'll Need

  • Screwdriver
  • Lintel clamps
  • L-shaped brackets
  • Black marker
  • Electric drill
  • 5/16-inch masonry bit
  • Hammer
  • 2 lead anchors
  • Insulation
  • Sheet metal screws
  • Socket wrench
  • Pliers
  • Stand the door unit in front of the fireplace, on its base facing outward, and hold it in place against your body. Lean over the top and remove the screws found on the back of the unit, one at each corner. Set them aside for later use. Assemble the lintel clamps and screw them into the proper holes, using two of the previously removed screws, one at each top corner.

  • Adjust the screws on the lintel clamps so they line up perfectly with the lintel bar along the front top edge of the fireplace box. The lintel clamp has a 1 1/2-inch slot that enables you to slide the clamp up or down for positioning. Use the bottom two previously removed screws to attach L-shaped metal brackets to both bottom corners of the glass door unit.

  • Position the entire fireplace door unit into the opening of the firebox. Use a dark black marker to mark where the bracket holes meet on the floor. Remove the door framework and use an electric drill fitted with a 5/16-inch masonry bit to drill 2-inch deep holes at both of the marked spots.

  • Hammer a lead anchor into each hole until it is flush with the ground. Lead anchors hold well in brick.

  • Seal the inside of the fireplace door frame using the fiberglass insulation supplied with the door kit. Pressing strips of the insulation into the the channels on the top and both sides.

  • Insert the door unit back inside the opening. Position it flush with the front of the fireplace box, and make sure that no insulation is sticking out. Secure the glass doors to the firebox by screwing the supplied sheet metal screws through the bottom brackets and into the lead anchors. Tighten the screws with a socket wrench.

  • Adjust the lintel clamps to the lintel bar. Make sure they are positioned correctly and then tighten the thumbscrew with pliers to secure the doors in place.

Tips & Warnings

  • Keep a wet/dry vacuum handy for cleaning up after you've drilled the holes.
  • When drilling holes into the fireplace box, make sure they point straight downward to ensure that the screws will go in straight as well.
  • Do not lay the fireplace doors onto a hard or rough surface as this could damage the glass.
  • Do not overtighten the screws in the bracket or you might loosen the anchors from the brick.
  • Always wear gloves when working with fiberglass insulation.

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