window frame slits

[truenorth]

Hi,
We just set up our new premier 29rk trailer for the season and I noticed that the window frames have about 1 inch wide slits. This slits are plugged on top of the frame and not at the bottom. We saw a bug already crawling in. My question is: should all slits are plugged?
What about water entry? Thank you in advance for your comments.
Regards,

[chuckster57]

Those are “weep holes”. The window can be installed with the fixed glass on either side. The “top” ones are supposed to be plugged.

[NH_Bulldog]

X2 to that

[rhagfo]

The bottoms ones drain condensation.