New Mortar Net with Insect Barrier™ lets water out without letting bugs in. Insects that enter through weep-holes and nest in the wall-cavities can cause serious problems. While our popular Weep Vents guard weep-holes against blockage by many types of insects or debris, new Mortar Net With Insect Barrier™ adds another layer of defense— inside the wall-cavity! Otherwise, it’s the same Mortar Net® product you’ve used for years. It gives you the same dependable moisture-control...the same mortar- capturing “dovetail” design...the same quick-&-easy installation...and the same LEED-friendly content in the main materials. Except now, one side is covered with a special fabric that still lets water OUT and lets air IN... but ALSO creates a barrier against insect-infestations. Mortar Net. 800-664-6638.