A building component (1) for attachment to an uneven surface (32) such that a gap (34) exists at one or more locations between the building component (1) and the uneven surface (32), the building component (1) including mounting means (10) located at one or more positions along the building component (1), the mounting means (10) having a portion (20) adapted to be located outside the plane of the building component (1) and between the building component (1) and the uneven surface (32), wherein fastening means attaches the mounting means (10) to the uneven surface (32) to enable the building component (1) to remain substantially straight when attached to the uneven surface (32).