What you don't always see is what you get.
I have a (Forrest River) 2010 Class C Coachman Freelander Dreamer 30QB with one slide-out. The engineer/s that designed this slide must have had received their degree from "Save a Buck Tech." The underside of the slide is so constructed (When slide is out) that air, dust, wasps, spiders, bees, mice and maybe a small monkey can pass into the inside without obstruction. When at the dealer for warrantee work I was told by the head of the repair department that the issue was un-resolvable and that I had purchased a unit that was defective from the beginning-when it came off the line...OUCH! Trying to work a retrofit with Forrest River Support garnered the same results, “Sorry, you’re stuck with what you have.” How any company is allowed, and willing, to produce and sell to the public such inferior work is still beyond me.
The best I could do myself was to install a wind-stop on the inside, using carpet as a type of buffer. It’s not perfect and the wind and bugs still find their way inside, especially when the slide is facing in the direction the wind is coming from. On cold, windy mornings, make sure your propane take is full, you’ll be cranking up the furnace and your feet will still be freezing.
Good luck, and if you find a retrofit, PLEASE let me know.
"If everything seems to be going well, look around, you've obviously overlooked something."