Question: Is it better to pull your slide outs in for the winter or can you leave them out? In our case, the trailer is parked on a permanent site.
Answer: It is really up to you. If you are using the trailer in winter, then you will probably have heat and water running and will want the space. Even then, you may want to pull them in for extremely cold weather or icing to help retain warmth. But this is a judgment call, since if things ice up in the closed position, you may want to wait to open the slides again until you know things have thawed out.
If the trailer is sitting empty, we would be inclined to close the slides because there is no reason for them to be open. We figure it would be one less roof that could leak, or otherwise have problems.