How to install glass bricks

Written by cameron easey
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Glass bricks or blocks can be installed for use as a wall or window to add a decorative element to your home. Glass bricks are installed in a similar fashion as traditional bricks--mortar is typically used to secure the bricks in place. However, you will need to use a special type of mortar that is designed for glass blocks. The first step is determining how many bricks you will need for your project.

Skill level:
Moderate

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Things you need

  • Tape measure
  • Level
  • Trowel
  • Caulking gun
  • Foam brush
  • Striking tool
  • Rubber mallet
  • Glass-block mortar mix
  • Bucket
  • Spacers
  • Clear silicone caulk

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Instructions

  1. 1

    Mix a batch of glass-block mortar in a bucket with water by following the instructions on the package of mortar mix.

  2. 2

    Place a half-inch layer of mortar with a trowel where you want to set the first layer of bricks.

  3. 3

    Set spacers on the mortar the width of a glass brick from the edge of the wall.

  4. 4

    Set the first glass brick into place between the spacers.

  5. 5

    Place another spacer the width of a glass brick on the mortar next to the first glass brick.

  6. 6

    Apply a half-inch layer of mortar to the side edge of the second glass brick.

  7. 7

    Set the second brick in place between the spacers.

  8. 8

    Continue this process until you complete the first layer of bricks.

  9. 9

    Press any excess mortar into the joints using the foam brush.

  10. 10

    Apply a half-inch layer of mortar along the top of the first layer of bricks with a trowel.

  11. 11

    Place spacers at each brick joint on top of the layer of mortar.

  12. 12

    Set the first brick of the second layer in place between the spacers.

  13. 13

    Apply a half-inch layer of mortar to the side edge of the second glass brick.

  14. 14

    Set the second brick in place between the spacers.

  15. 15

    Continue this process until you complete the second layer of bricks.

  16. 16

    Press any excess the mortar into the joints using the foam brush.

  17. 17

    Continue laying layers of bricks until you reach the desired height or have covered the entire area.

  18. 18

    Let the mortar set for at least an hour, and then pull the ends off of the spacers.

  19. 19

    Cover the spacer holes with mortar using the foam brush.

  20. 20

    Smooth out the mortar along the joints by using the striking tool, if necessary.

  21. 21

    Let the mortar dry for at least 24 hours, then run a bead of caulk around the edges of the wall to provide a watertight seal.

Tips and warnings

  • Apply clear silicone caulk to the mortar joints to prevent mildew.
  • Clean off excess mortar on the brick with a damp cloth and non-abrasive cleaner.
  • A striking tool can be purchased at any home-improvement store.
  • Class bricks should not be used for load-bearing walls.
  • Blocks will sit unevenly if you cover the spacers with mortar.

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