Every RV cover gets a score from 0 to 100% built from four factors, which maps onto the 5-point rating shown on the site (a 0% score would be 1.5 stars; a perfect score, 5). Each factor is scored against fixed reference points, not against the other products in the list, so adding a new model never moves another model’s rating. Covers are grouped by RV type: travel trailers (with toy haulers and pop-up campers), fifth wheels, Class A and Class C. All four groups use the same scale.
| Factor | Measures | Weight |
|---|---|---|
| Protection | roof and side panel plies, or denier for woven fabric | 35% |
| Features | door zippers, tension panels, vents, tire and gutter covers, ladder cap, storage bag | 30% |
| Value | price per foot of the longest RV the size fits | 20% |
| Warranty | warranty length | 15% |
Where the numbers come from
Fit length, fabric, ply counts, features and warranty come from the maker’s own copy, on its website or a retail listing, or from a retailer’s spec page where the maker’s copy leaves a gap. When a maker’s figures conflict (for example a listing title that gives one size and a bullet that gives another), the figure that matches the part number is used. Each model is shown at one common size. Prices are checked at Amazon and the maker’s own store, and the lowest price at a store the page links to is used.
The factors
Protection scores the roof panel (70%) and side panels (30%). For non-woven and Tyvek fabric it counts plies: one ply scores zero and three plies full marks. Some covers claim seven or nine layers, but makers count layers differently, so nothing above three earns extra credit. For woven polyester it uses the fabric’s denier: 150D scores zero and 600D full marks. If only the roof or only the sides are published, that panel’s score is used alone.
Features is 25% for zippered panels that reach the entry door, 20% for adjustable tension panels or front and rear cinch straps, 20% for air vents, 10% for included tire covers, 10% for gutter or corner protectors, 10% for a storage bag and 5% for a ladder cap.
Value is the price divided by the longest RV length the size fits, in dollars per foot, on a log scale, so halving the price always counts the same. $25 per foot scores zero and $6 per foot full marks.
Warranty is the maker’s warranty: 1 year scores zero and 5 years full marks.
What isn’t scored
Waterproof rating, cover weight, fabric color and release date are listed but not scored. Waterproof ratings are published for only a few covers and are measured in different ways.
Missing data
If a figure isn’t published, that factor gets the neutral middle score (50) and the product page marks it as estimated. Features score neutral only when none of them is published; a feature the maker doesn’t mention otherwise counts as absent. The exception is warranty: a maker that doesn’t publish one gets no warranty counted, so that factor scores zero, the same as a one-year warranty, and is marked estimated.
Ties and discontinued models
Products are ranked by score within each group. Discontinued models stay listed but rank below every current model and can be hidden with the “Hide discontinued” filter.