of a wall forming the vent hole the gable louver assembly then receives siding in the siding slot 60 a gable louver assembly in accordance with the present invention is structurally sound and attractive in appearance it is designed to abate water penetration problems and to permit easy escape of water that may get into the mounting band especially the bottom segment thereof water penetration abatement features include the backing 51 being wider than the decorative flange 53 the miter stabilizer slot drain opening 56 the weep holes 58 and the weep holes 59 all of which help water escape when a mounting band segment is used to form a horizontal base of a louver assembly yet another water abatement feature is the inclusion of the raised edges 11 on the slats 10 which tend to block water blown upwardly along the slats by wind the slat jamb and mounting band components described herein permit relatively easy construction of a wide variety of differently shaped gable louver assemblies from just three components it is also beneficial that the louver assembly of this invention has an integral louver jamb subassembly that is constructed separately from the band segments 15 39 because in this manner the band segments can have features most beneficial for mounting the assembly on a wall and for water abatement also the features of the jamb subassembly can be mainly focused on securely holding the slats the present invention has been illustrated with reference to a gable louver assembly having an isosceles triangular configuration however those skilled in the art will recognize first that the louver assemblies need not necessarily be used in gable areas although they are ideal for that application and second that many other variations in the.