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Source: https://outdoors.stackexchange.com/q/14600
License name: CC BY-SA 3.0
License URL: https://creativecommons.org/licenses/by-sa/3.0/

<p>Looking for solutions for screen covers for the inspection port on a sunfish.  In the Q&amp;A <a href="https://outdoors.stackexchange.com/questions/14218">What to look for in Marine Grade Expanding Foams</a> we learn that water in the hull of sunfish can be an issue.  There are several posts online about leaving the inspection ports (<em>after you install them</em>) open so they boat can dry out over a period of months.  There are also post recomending screen covers to keep rodents and insects from making home in the hull of your boat.</p>

<p>I looked around and only found one <a href="https://my2fish.wordpress.com/tag/norm-abrams/" rel="nofollow noreferrer">post with an example of how, it is a fall 2011.</a>  The author promised to post a followup in the spring on the success of the screen but did not post the followup.  Does this solution have a fatal flaw, or will it work as is?</p>

<p>My boat will be stored outside, upside down on lumber just off the ground. I am looking for an easy to make, solutions to allow air flow while keeping the bugs and rodents out. </p>

<p>I purchased and installed inspection ports with the screw in lid, much like in the image.  The screw on lid is used while sailing, the screen for ventilation when in storage. The port mounts fairly flush so you can't use a rubber band or something to seal the opening, like you might do with a cheesecloth and a mason jar.</p>

<p><a href="https://i.stack.imgur.com/VFRuD.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/VFRuD.jpg" alt="enter image description here"></a></p>