to the opening 200 with a plurality of nails 422 only one of which is shown in fig1 alternatively gasket 420 can be attached with staples or adhesive to the opening 200 this gasket 420 can be provided to window installers in strips which can then be cut to the size of the opening 200 once the gasket 420 has been attached to the opening the window 100 can be inserted the frame 120 of the window 100 will then engage the gasket 420 much like the opening engaged gaskets 410 and 400 during the window insertion process described above like the other embodiments 410 400 gasket 420 functions by forming a gap or channel 500 for the drainage of moisture and water the gasket 420 further functions to prevent water from entering the interior of the house and serves to prevent the insulation 320 from impeding the flow of moisture in the channel 500 fig1 shows another embodiment of a gasket 430 that can be used to create channel 500 in this case the gasket 430 has a rounded shape that is easily compressed this allows the gasket to fill a relatively large space 310 between the window and the rough opening 200 while still being able to easily be compressed for a smaller space 310 this shape is called rounded in this.