Drainage-promoting wrap for an exterior wall or roof of a building

An exterior wall or roof assembly of a building, comprising an inner sheathing member, an exterior building material, and a drainage-promoting wrap extending between said inner sheathing member and said exterior building material, said wrap comprising:

• a weather-resistive membrane that blocks the penetration of water therethrough and that permits the passage of moisture vapor therethrough;
• and
• a series of separate elongate polymeric filaments separately bonded to a face of said membrane, each of said separate elongate polymeric filaments extending in a longitudinal direction on said membrane and a substantially horizontal direction within said assembly, and said separate elongate polymeric filaments being sufficiently spaced-apart such that a portion of said face of said membrane is exposed between each adjacent pair of said separate spaced-apart elongate filaments;
• each of said elongate filaments being of a common thickness that projects to a predetermined height from said face of said membrane and having a series of depressions formed therein that do not extend to said predetermined height and that provide a series of drainage paths transversely across said filaments;
• and
• said series of depressions being located at spaced intervals along a length of each of said elongate filaments and being formed by flattened sections of said elongate filaments, each of said flattened sections fusing said filament to said membrane to bond said filament to said membrane.