RV Inspiration

5 Common Myths About RV Insulation

There’s this vein above my temple that throbs every time Joe the RV Salesman rehearses one of these five myths about RV insulation. These falsehoods just won’t die, and unfortunately, even some RV manufacturers seem to believe them!

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What Is R-Value?

R-value is just a number indicating how quickly a material will transfer heat.  High R-value = heat insulator. Low R-value = heat conductor.  The thicker the material, the greater the R-value.

1. R-Value Matters for RV Skirting

Here’s what the myth says: “The skirting panels must be insulated and have a high R-value.” But the truth is that it’s not about R-value; it’s all about airflow!

2. 12 Sales Brochures Convey the Actual R-Value

For instance, many RV manufacturers will say, “Our wall is R-11.” Usually, this means one of two things: 1. The walls have a 2-inch foam core with internal aluminum tubing. 2. The walls have 16-inch wide fiberglass batt insulation.

3. Fiberglass Insulation Is a “Tried ‘n’ True” Solution

Many entry-level “stick ‘n’ tin” RVs still use fiberglass batting for insulation in their walls and ceilings. While installation methods have improved, fiberglass remains one of the worst choices for RV insulation.

4. Reflectix Window Covers Are Great for Cold-Weather Camping

There’s actually a grain of truth in this myth. Yes, DIY reflective covers are great…for hot weather. In dark or cold weather, you wouldn’t want to reflect heat away from your RV, and rather than trying to hold in heat by reflecting it back into your RV.

5. R-30 Insulation Is Actually a Thing

Any time you see a sidewall R-value above R-10 or a roof R-value above R-15, beware. Most of the time, claims of R-30 or R-40 indicate that the manufacturer is using reflective foil-faced bubble wrap, a.k.a. Reflectix.

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