In masonry cavity walls, collection of mortar behind facings, flashing levels and weep holes is essential for good wall performance and to prevent water damage. Mortanet and WallDefender products work to protect masonry against moisture damage by preventing mortar deposits from clogging weep holes. Its 90% open mesh allows moisture to flow to the openings and air to move into the cavities to promote drying. Finally, the components of the products are compressible to allow variations in cavity width during installation and allow air circulation by equalizing the pressure. Be aware, however, that there is one more component in the Mortarnet product. The wicking net of the latter is covered with an additional membrane that prevents insects from settling. Available in several thicknesses such as: 0.4'', 1'' or 2'' of air space in boxes of 100 linear feet.