Foam Insulation Vs Fiberglass Insulation For Your RV

The two reasons why you should insulate your RV are: if your old insulation is worn-out or it is ineffective. With a 2×2 Insulation of Vacuum bonded Foam or Fiberglass Batts insulation, your RV will be ready for every type of weather!

However, choosing between the two is a tough call, so check the Pros and Cons of both the Insulation before confirming on one.

Terry Frazer’s RV Center talks about Foam Insulation Vs. Fiberglass Insulation in an RV

See more from Terry Frazer RV Center.

Terry Frazer elaborates on Foam Insulation Vs Fiberglass Insulation


Foam Insulation

Fiberglass Insulation

Modern-Vacuum Bonded Traditional- Fiberglass Batts
Durable and does not expand Short Lifespan as it expands
High Tensile Strength Higher insulation rating
Resistant to Water and Molds Can be Damaged due to Water and Molds

See more distinct differences between Foam and Fiberglass Insulation from Terry Frazer’s RV Center. 

Danny Kelly from provides his tips on Insulating your RV with foam or fiberglass

  • The best way to raise the temperature of the roof would be to install some sort of foam on the exterior of the roof, thus bringing the roof inside the thermal envelope of the RV. As exterior insulation is impossible, Spray foam should do the trick. There are many opinions on this but I would think a closed cell foam would work the best. This is also a semi-permanent solution so if it does not work for some reason – could have an expensive problem on your hands.
  • High-density fiberglass may work well if there is not great access – can be blown in through a few small holes cut in the subceiling. Most high density products are air barriers (over 3.5 under per cubic foot I believe will constitute an air barrier) so should perform similar to the foam.

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Whatever insulation you do to your RV interior, the ceiling temperature will stay cold. Hence, the trick is to use specific insulation materials that are necessary for the climates you plan to cover in your RV.

What type of insulation do you have in your RV? Tell us in the comments below.

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