to the outside of an existing weep hole the flap contains a screen which prevents insects from crawling in while allowing moisture to escape from the cavity walls for new construction the insect barrier also has a flap hinged to a frame but the frame has two portions a first portion containing having a flap and a second portion containing a fixed screen in this embodiment the frame can be secured within the weep hole application_number US 58898700 A description referring to fig1 a front view of the preferred embodiment of the present invention as shown on an existing brick exterior of a home is shown while the preferred embodiment speaks to the use on a brick exterior of a home the preferred embodiment of the present invention can be used on any existing exterior wall that incorporates weep holes in this view a flap frame 113 and screen 114 of the insect barrier 102 can be seen on an existing brick exterior 101 the preferred embodiment of the present invention can be made from any suitable material such as but not limited to wood metal etc fig2 and fig3 illustrate a cut away side view and top view respectively of the preferred embodiment of the insect barrier 102 of the present invention as it would exist within an existing brick exterior of a home a back 108 of a frame 106 of the insect.