A trim bead for a building wall incorporates an outwardly extending flange portion to provide a mechanical key for a layer of exterior finishing coatings, such as stucco coatings. The trim bead may be used in stucco systems for exterior building walls that employ continuous thermal insulation over t
A trim bead for a building wall incorporates an outwardly extending flange portion to provide a mechanical key for a layer of exterior finishing coatings, such as stucco coatings. The trim bead may be used in stucco systems for exterior building walls that employ continuous thermal insulation over the building wall substrate.
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1. A trim bead for a building wall comprising: spaced-apart front and rear walls;a bottom wall connecting the front and rear walls, said bottom wall having a first protrusion that extends horizontally beyond said front wall;a flange portion extending substantially horizontally from said front wall,
1. A trim bead for a building wall comprising: spaced-apart front and rear walls;a bottom wall connecting the front and rear walls, said bottom wall having a first protrusion that extends horizontally beyond said front wall;a flange portion extending substantially horizontally from said front wall, wherein said flange includes a plurality of openings communicating through the thickness of said flange; anda second protrusion extending horizontally from said front wall and positioned between said first protrusion and said horizontally extending flange portion of said trim bead. 2. The trim bead of claim 1, wherein said bottom wall comprises at least one weep hole. 3. The trim bead of claim 1, wherein said rear wall comprises at least one opening communicating at least partially through the thickness of the rear wall. 4. The trim bead of claim 1, wherein said flange comprises a mesh, diamond mesh, or ribbed structure. 5. The trim bead of claim 1, wherein said flange is perforated, stamped, or expanded. 6. The trim bead of claim 1, wherein said trim bead comprises polymer material, a metal material, a metal alloy material, or composite material. 7. The trim bead of claim 1, wherein said horizontally extending flange extends beyond the front edge of said first and second protrusions. 8. The trim bead of claim 1, wherein said second protrusion is positioned in a spaced-apart relationship between the bottom wall and the horizontally extending flange portion of the trim bead. 9. The trim bead of claim 1, wherein said first protrusion and spaced-apart second protrusion extend substantially parallel to each other along the length of the longitudinal axis of the trim bead. 10. An exterior finish system for a building wall comprising: a trim bead comprising spaced-apart front and rear walls, a bottom wall connecting said front and rear walls, said bottom wall having a first protrusion that extends horizontally beyond said front wall, a flange portion extending substantially horizontally from the front wall, wherein said flange includes a plurality of openings communicating through the thickness of the flange, and a second protrusion extending horizontally from the front wall and positioned between said first protrusion and said horizontally extending flange portion of the trim bead;an insulation layer; andat least one layer of an exterior finishing coating applied to the insulation layer and the flange of the trim bead. 11. The exterior finish system of claim 10, wherein said bottom wall comprises at least one weep hole. 12. The exterior finish system of claim 11, wherein said rear wall comprises at least one opening communicating at least partially through the thickness of the rear wall. 13. The exterior finish system of claim 10, wherein said flange comprises a mesh, a diamond mesh, or a ribbed structure. 14. The exterior finish system of claim 10, wherein said flange is perforated, stamped, or expanded. 15. The exterior finish system of claim 10, wherein said trim bead comprises polymer material, a metal material, a metal alloy material, or composite material. 16. The exterior finishing system of claim 10, further comprising a weather resistive barrier. 17. The exterior finishing system of claim 10, further comprising a reinforcement layer attached to said insulation layer for holding exterior finishing coatings. 18. The exterior finishing system of claim 10 wherein said exterior finishing coatings comprise at least one layer of stucco. 19. The exterior finish system of claim 10, wherein said horizontally extending flange extends beyond the front edge of said first and second protrusions. 20. The exterior finish system of claim 10, wherein said second protrusion is positioned in a spaced-apart relationship between the bottom wall and the horizontally extending flange portion of the trim bead. 21. The exterior finish system of claim 10, wherein said first protrusion and spaced-apart second protrusion extend substantially parallel to each other along the length of the longitudinal axis of the trim bead. 22. The exterior finish system of claim 10, further comprising a weather resistive barrier. 23. A building wall comprising: a frame;a building wall substrate attached to the frame;a trim bead attached to the building substrate, said trim bead comprising spaced-apart front and rear walls, a bottom wall connecting the front and rear walls, said bottom wall having a first protrusion that extends horizontally beyond said front wall, a flange portion extending substantially horizontally from said front wall, wherein said flange includes a plurality of openings communicating through the thickness of said flange, and a second protrusion extending horizontally from said front wall and positioned between said first protrusion and said horizontally extending flange portion of said trim bead;an insulation layer adjacent the trim bead and attached to said frame;and at least one layer of an exterior finishing coating applied to the insulation layer and the flange of the trim bead. 24. The building wall of claim 23, further comprising a reinforcement layer attached to said insulation layer. 25. The building wall of claim 24, wherein said reinforcement layer comprises a lath. 26. The building wall of claim 25, wherein said exterior finishing coating comprises: at least one layer of a stucco coating applied to the insulation layer, a lath, and the flange of the trim bead. 27. The building wall of claim 23, wherein said horizontally extending flange extends beyond the front edge of said first and second protrusions. 28. The building wall of claim 23, wherein said second protrusion is positioned in a spaced-apart relationship between the bottom wall and the horizontally extending flange portion of the trim bead. 29. The building wall of claim 23, wherein said first protrusion and spaced-apart second protrusion extend substantially parallel to each other along the length of the longitudinal axis of the trim bead.
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