01/23/2026
Winter’s doing winter things again ❄️ — and when you stack 6”–18”+ of snow on an RV, the roof doesn’t care what your travel plans were.
Here’s the physics in plain English:
Snow load isn’t about depth — it’s about weight per square foot. And snow weight changes wildly with temperature and moisture.
• Light, “fluffy” snow can be roughly 5–10 lb/ft³
• Wet/heavy snow (near freezing or after partial melt/refreeze) can be 15–25+ lb/ft³
A quick back-of-napkin load estimate:
• 12” (1 ft) of fluffy snow @ ~10 lb/ft³ ≈ 10 lb/ft² (10 psf)
• 18” (1.5 ft) of wet snow @ ~20 lb/ft³ ≈ 30 lb/ft² (30 psf)
That jump is why two storms with the “same inches” can be totally different for your RV.
What snow can do to an RV roof (covered or uncovered) 🧊
1. Structural stress: RV roofs are lightweight structures (laminated decking + trusses/rafters). Heavy snow can cause visible sag, interior ceiling waves, cabinet/trim separation, or stress cracks over time.
2. Leak risk from ice and melt cycles: Heat from inside the RV melts the bottom layer, water runs, then refreezes at colder edges and around fixtures. That can push water under lap sealant, around vents, skylights, antennas, and slide-topper seams.
3. Damage to “stuff on the roof”: A/C shrouds, vent lids, solar mounts, satellite bases, and sealant joints can be stressed by snow shifting or ice bonding.
4. Covers can make it worse (sometimes): A tight cover can trap snow, create low spots that “pool” weight, and when wind moves snow/ice against the cover it can abrade roof edges and stress tie-downs.
What to do (and why) once the snow stops falling ✅
• Do a walk-around first (no heroics): Look for sagging areas, bowed gutters, strained awning hardware, or slide toppers loaded like a hammock. If anything looks deformed, reduce load gently and prioritize safety.
• Clear the high-risk zones:
• Slides/slide toppers (they collect snow and can dump water into seals when it melts)
• Around roof penetrations (vents/skylights/antennas)
• Valleys/low spots (where weight concentrates)
• Use the right tools: A roof rake with a foam or plastic head is your friend. Avoid metal shovels/scrapers — one puncture in a membrane roof turns “snow day” into “water damage season.”
• Don’t chip ice on the roof: Ice bonding to the membrane is a great way to tear material or pop sealant. Remove loose snow, let sun/temps do the rest, and keep drains/edges clear so meltwater can escape.
• If you must get on the roof: Only if your roof is rated for foot traffic and conditions are dry enough to prevent a fall. Falls beat roof repairs every time.
Extra credit that prevents headaches:
• Ventilate and manage interior humidity: Warm, humid air increases condensation and melt/refreeze problems.
• After the thaw: Inspect lap sealant and fixture bases. Freeze cycles can reveal weak sealant that was “fine” in summer.
Bottom line: inches don’t tell the full story. Wet snow + refreeze cycles = the highest risk combo for both roof stress and leaks.
Stay safe out there 🔧🏕️
— NomadicRVTech
