A mower cover seems like a simple purchase, but the wrong one will not protect your equipment effectively. A cover that is too large flaps in the wind and lets rain underneath. A cover that is not waterproof traps moisture against the deck. A cover without UV protection disintegrates after one season. This guide covers every factor you need to consider so you buy the right cover the first time.
1. Measure Your Mower First
Before browsing covers, measure your mower. You need three dimensions:
- Length: From the front of the engine housing to the back of the rear deck or handle
- Width: The widest point, typically the rear wheels or the deck
- Height: From the ground to the top of the handle or engine
For riding mowers, measure from the front of the engine to the back of the rear deck, and include the discharge chute in the width measurement. For zero-turn mowers, measure the full deck width including any overhang.
Choose a cover that is 2 to 4 inches larger than your measurements in each dimension. This provides enough room to slip the cover on easily while still fitting snugly enough to stay put in wind.
2. Material: What the Cover Is Made Of
The material determines durability, waterproofing, and UV resistance. Here are the common options:
Polyester (Oxford Fabric)
The most common material for quality mower covers. Polyester is lightweight, durable, and holds its shape. Look for denier ratings. 300D to 600D is standard for mower covers. Higher denier means thicker, more durable fabric. Polyester covers typically have a PU (polyurethane) or PVC coating on the inside for waterproofing.
Vinyl
Vinyl covers are heavier and completely waterproof without additional coatings. They are extremely durable and resistant to tears. The downside is that vinyl is less breathable than polyester, so condensation can build up underneath. Vinyl is the best choice for riding mower seat covers where direct water contact is the primary concern.
Polyethylene (PE)
PE is used for budget covers and storage bags. It is waterproof but less durable than polyester or vinyl. PE covers typically last 1 to 2 seasons before UV degradation causes cracking. They are a good choice for occasional use or indoor storage but not for year-round outdoor exposure.
3. Waterproof vs. Water-Resistant
These terms are not interchangeable and the difference matters:
- Waterproof: Water cannot penetrate the material at all. The inside stays completely dry regardless of rain intensity. Look for covers with welded seams, not stitched seams, because water can seep through stitch holes.
- Water-resistant: The material sheds light rain but can absorb water during heavy or prolonged rain. Water-resistant covers are typically lighter and more breathable but should not be relied on for year-round outdoor storage.
For year-round outdoor storage, choose waterproof. For covered storage or occasional outdoor exposure, water-resistant is adequate.
4. UV Protection
UV protection is what determines how long the cover itself lasts. Without UV inhibitors, any fabric will degrade, fade, and become brittle after 6 to 12 months of sun exposure. Look for covers that specifically mention UV resistance or UV coating.
UV-resistant covers typically last 2 to 4 years depending on your climate. In the Southwest (Arizona, New Mexico, Texas), expect 2 to 3 years. In the Pacific Northwest or Northeast, 3 to 4 years is typical.
5. Ventilation: Preventing Condensation
This is the most overlooked factor. A completely sealed waterproof cover traps moisture from the ground and from temperature swings. That moisture condenses on the inside of the cover and sits against your mower, causing the exact rust you are trying to prevent.
Vented covers solve this with built-in air vents that allow moisture to escape while still blocking rain. Look for covers with:
- Mesh vents on the sides or top
- Breathable membrane layers that let water vapor pass through while blocking liquid water
- Air gaps near the bottom hem that allow airflow
If you buy a non-vented waterproof cover, periodically remove it and let the mower air out to prevent condensation buildup.
6. Fit and Securement
A cover that blows off in the first windstorm provides zero protection. Look for these securement features:
- Elastic hem: The simplest and most common. The elastic band around the bottom pulls the cover snug. Works well for push mowers but can loosen over time.
- Drawstring cord: A cord that cinches the bottom tight and ties off. More secure than elastic alone.
- Buckle straps: Straps that clip underneath the mower. The most secure option, especially for riding mowers in windy areas.
- Tie-down loops: Fabric loops that allow you to add bungee cords or rope for extra security.
For riding mowers, buckle straps or drawstring closures are strongly recommended. For push mowers, elastic hems are usually sufficient.
7. Additional Features to Consider
- Storage bag included: Many covers come with a drawstring storage bag for when the cover is not in use.
- Reinforced seams: Look for double-stitched or heat-welded seams. Single-stitched seams are the first point of failure.
- Soft inner lining: A fleece or fabric inner layer prevents the cover from scratching painted surfaces on riding mowers.
- Color: Dark colors (black, dark green) absorb heat, which can increase condensation. Light colors (gray, tan) reflect heat and stay cooler.
8. Price vs. Value
Mower covers range from $15 to $80. Here is what to expect at each price point:
- $15 to $25: Basic PE or thin polyester covers. Water-resistant, minimal UV protection. Expect 1 to 2 seasons of outdoor use.
- $25 to $45: Mid-range polyester covers with PU coating, elastic hem, and basic UV protection. Good value for most homeowners. Expect 2 to 3 seasons.
- $45 to $80: Heavy-duty polyester or vinyl covers with welded seams, buckle straps, vents, and high UV ratings. Best for year-round outdoor storage in harsh climates. Expect 3 to 4+ seasons.
Spending $35 to $45 on a mid-range cover is the sweet spot for most homeowners. It provides genuine waterproofing, UV protection, and a secure fit without overspending.
Quick Checklist Before You Buy
- Measure your mower (length, width, height)
- Choose a cover 2 to 4 inches larger than your measurements
- Select waterproof material (polyester with PU coating or vinyl)
- Confirm UV resistance rating
- Check for ventilation (vents or breathable membrane)
- Verify securement method (elastic, drawstring, or buckle straps)
- Confirm the cover is designed for your mower type (push, riding, or robot)
With the right cover, your mower will stay dry, rust-free, and ready to start on the first pull for years to come.
