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engineering bricks

  1. cbrann

    white residue on engineering bricks

    I Cleaned some tyrolean render off some engineering bricks and its left a residue on the brick, I have used brick acid, thinners, turps, wire brushes and nothing moves the residue, has anyone had any experiences like this.
    • cbrann
    • Thread
    • engineering bricks pointing tyrolean
    • Replies: 9
    • Forum: Your Projects
  2. B

    Engineering bricks class A or B

    Hi all, How can you tell the difference between a class A and a class B engineering brick? Are they marked somehow? I have a pile of bricks left from the previous house owner and am starting an extension. Would be nice to know if I could use these as steel beams require class A brick support...
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