December Tips for Insulating Your RV Interior

Looking for advice on insulating your RV? Check out these expert tips.

The temperatures have dropped and it will get colder as we get deeper into winter weather, so if you’re planning an outing that involves your RV, now is the time to insulate your RV interior so you can ensure you stay warm while your heating costs stay low.

Window Work

Protecting yourself and your family from the nip in the air could be as easy as doing some routine maintenance. Winterizing basics first involve looking at your windows, as this is the part of an RV that is most vulnerable and lets in the most cold air and allows warm air to escape. This includes:

  • Checking glass for cracks
  • Inspecting seals to ensure they are solid
  • Considering double-paned windows if you don’t already have them
  • Replacing old caulk
  • Adding thick and/or reflective curtains around your windows


Doors are often considered the second most vulnerable area, as the constant opening and closing, as well as vibrations from being on the road, can wear out the protective seals and even bend the frames out of shape ever so slightly – and it doesn’t take much to cause an uncomfortable draft.

Carefully inspect your doors and make the necessary adjustments, but this is also a good time to replace the weather stripping. Insulating the door with a curtain will also significantly improve the comfort level in your RV, as this acts as a dam, shutting out drafts.


Don’t overlook the exterior as you take on the task of insulating your RV. Not everyone is fortunate enough to have a heated underbelly, but even if you do, consider implementing exterior skirting, which provides that much-needed barrier between the underside of your RV and the frigid outside air.

You can either make your own out of any number of materials, from vinyl to plywood to Styrofoam, or go to your local RV supplier and get one that fits your unit. The main benefit most RV enthusiasts note is a reduction in temperature fluctuations.

Mind the Vent Gap(s)

Your rooftop skylights and vents are a prime area for heat to escape if you don’t cover them. Fortunately, insulating your RV in these areas is made easy with special “pillows” that block gaps where heat can escape. If you’re on a budget and are a bit resourceful, you can create your own solution with throw pillows and tape.

Insulating your RV correctly might also mean leaving it to the professionals. At Gray Diesel & Equipment Services, we offer RV services, including winterizing, which ensures vulnerable areas of your RV are ready for the cold. Contact us and make an appointment to have your RV serviced.