Why Double Brick

Double Brick is the most common method of construction in WA.
structural masonry cavity construction
Construction consists of two layers(sometimes called leaves) of masonry with a cavity between them. The layers are connected by steel ties at regular intervals.

As this form of construction can also use limestone, rendered brick and concrete block for the external face, and brick or concrete block for the internal leaf, a better description would be Structural Masonry, Cavity Construction.

The purpose of the cavity between the outside layer of brick and the inside layer so that moisture doesn’t penetrate into the home. In more sustainable homes this cavity is partially or fully filled with insulation.

Internal walls are usually a single brick thickness and generally use a 2nds brick or concrete block that is plastered or lined using a lining board.

Advantages

  • It is extremely durable requiring very little maintenance.
  • The mass of the brickwork can help moderate the internal temperature of the dwelling
  • You can place a heavy fixing anywhere on the walls.

Disadvantages

  • More expensive than Brick Veneer.
  • Not as well insulated.
  • The house will take a long time to warm up in winter or cool down once it does get hot.
  • Likely to crack if subjected to ground movement.

 

Also see:  Brick Veneer.

See Bricks for more posts.

 

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4 comments to Why Double Brick

  • Jensen

    Masonry is generally a highly durable form of construction. However, the materials used, the quality of the mortar and workmanship, and the pattern in which the units are assembled can significantly affect the durability of the overall masonry construction.

  • Marie L

    Note: Never fill the cavity behind the brick veneer with an insulation product as this will seriously alter the weatherproofing performance of the cladding.

    • Brian Ashworth

      I would agree that its not the best idea to “fill” the cavity, but its quite acceptable to have some insulation in the cavity.
      Brian