Grill Covers for Gas Grills: How to Choose, Fit and Maintain One

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A good grill cover for gas grills keeps rain, sun, bird droppings and dust off your burners, grates and control panel, so the grill starts reliably the next time you need it. The right cover fits your grill’s exact footprint, breathes enough to prevent trapped moisture, and stays put in wind. This guide walks through how to measure, choose, install and care for a cover, plus the mistakes that cause most cover-related damage.

Why a Cover Matters for a Gas Grill

Gas grills have more exposed metal and more small parts than most people realize. Burner tubes can corrode from the inside when moisture collects and dries repeatedly. Venturi tubes and burner ports clog with grease, insects and debris. Igniter electrodes can fail when they get wet or caked with residue. A fitted cover slows all of that down. It will not stop rust completely, and it will not replace cleaning, but it keeps the worst of the weather off the cooking surfaces and hardware.

Cover quality also matters for the grill’s finish. Powder-coated lids and carts fade and chalk in strong sun. Stainless steel can develop surface rust in salty or humid air when water sits on it for days. A cover that traps water against the surface can do more harm than no cover at all, which is why ventilation and fit deserve as much attention as the fabric.

Step 1: Measure Your Grill Correctly

Most cover problems start with a bad measurement. Manufacturers list cover sizes based on grill width, depth and height, but the numbers they publish are usually for the grill body. Your grill may have side shelves, a side burner, a propane tank holder or a hood that sticks out further than you expect. Measure with the shelves folded down and the side tables in their normal position.

1. Width: Measure from the outer edge of the left side table or side burner to the outer edge of the right side table. If you have no side tables, measure the widest point of the cart.
2. Depth: Measure from the front of the control panel to the back of the grill, including any rear side burner or handle that protrudes.
3. Height: Measure from the base of the cart to the top of the closed lid, including the handle or thermometer if they stick up.
4. Tank: Decide whether the propane tank stays under the cover or sits outside it. Many covers have a separate tank pocket or a drawstring hem to account for the hose.

Add one to two inches to each measurement before comparing it with a cover’s listed size. A cover that is a few inches too large will flap in wind. A cover that is too small will strain at the seams and may split along the corners.

Step 2: Choose the Right Material

Fabric is the second decision, and it depends on your climate. Common materials include polyester with a water-resistant coating, vinyl-coated polyester, and heavier woven fabrics with UV treatment. Each has trade-offs.

If you live where summers are hot and dry, UV resistance matters more than waterproofing. If you deal with frequent storms, snow or coastal humidity, look for stronger seam construction and vents. For a deeper look at climate-specific choices, see How to Select a Durable Grill Cover for Your Climate.

Step 3: Check Ventilation and Fit Features

A cover should keep water out and let moisture escape. Look for:

• Vents or mesh panels on the top or sides, which allow humid air to leave.
• Elastic or drawstring hems that snug the cover at the base so wind cannot lift it.
• Reinforced corners at the top and bottom, where stress concentrates.
• Tie-down points or straps for windy locations. Some covers include hooks or cords for securing them to the cart legs.
• Tank pocket or cutout if the propane tank stays with the grill.

Avoid covers with no vents at all if your grill sits outdoors year-round. Sealed covers feel protective, but they hold condensation against metal. Owners often report surface rust on lids and burner housings after a few months under sealed covers in humid areas.

Step 4: Set Up the Cover Before Storms Arrive

Install the cover on a clean, cool grill. Do not cover a grill that is still hot, and do not cover one that has a grease fire risk from fresh drippings. Follow this routine:

1. Turn all burners off, close the lid and turn off the propane tank valve at the cylinder.
2. Let the grill cool completely. This usually takes at least 30 to 45 minutes after cooking, longer after a high-heat sear.
3. Scrape the grates and empty the grease cup or tray so residue does not sit under the cover.
4. Check that the drip tray and burner area are free of debris and pests’ nests.
5. Drape the cover over the grill, centered and smooth, then tighten the hem and secure any straps.

Before the first cover season, do a quick check of the connections. If you suspect a gas leak, do not use the grill, and call a qualified technician or your propane supplier. A soapy-water test on fittings is a common check, but it is a job for a professional if you are unsure what you are looking at.

Step 5: Maintain the Cover and the Grill Underneath

A cover needs care too. Once a month during heavy use, or after every big storm, lift the cover and look for these signs:

• Pooled water or damp spots on the lid, cart top or side shelves
• Insects, spider webs or rodent activity inside the cover
• Rust blooms on burner tubes or grates
• Torn seams, cracked coating or flattened vents

Clean the cover with mild soap and water, rinse well and let it air-dry fully before storing. Do not use harsh solvents, which can break down coatings. Store the cover in a dry place, folded loosely rather than tightly creased, so the fabric does not develop permanent crease lines.

For the grill itself, a regular schedule matters more than the cover. Using and Maintaining a Four-Burner Gas Grill covers routine care for burners and ignition, and How to Deep Clean Your Gas Grill’s Burners and Grates explains how to remove the buildup that a cover cannot stop.

Common Mistakes to Avoid

• Covering a hot grill. Heat can melt or scorch the fabric and create a fire risk. Wait until the grill is fully cool.
• Buying by brand name alone. A cover sized for a different model may not fit your grill’s side tables or hood.
• Using a cover with no vents in a humid climate. Trapped moisture is a common cause of rust and mildew.
• Leaving the cover on a grill that still has dampness underneath. Wipe the cart top and dry the grates first.
• Ignoring wind. A loose cover can blow off, tear or scratch the finish. Use straps or the hem cord.
• Storing the grill with the propane tank connected under the cover. Keep the valve closed and check the hose regularly for cracks.
• Using the cover as a substitute for cleaning. Grease and food residue still attract pests and corrode metal.

Practical Tips for Longer Cover Life

• Replace the cover when seams split, vents collapse or the coating flakes. A cover with compromised waterproofing no longer protects the grill as intended.
• In sunny climates, use a light-colored cover. Darker fabrics can heat up more and degrade faster in intense sun.
• Keep a small towel handy and wipe the cover after storms before you store it.
• If you move the grill often, consider a lighter cover, or a cart cover paired with a separate lid cover.
• Check manufacturer care notes. Many list recommended cleaning agents and drying methods.

Recommended Gear

• A fitted cover with vents and a hem drawstring. It adds protection from wind and gives moisture a way out, which is the main reason a cover causes or prevents rust. Check price on Amazon
• Heavy-duty cover straps or tie-downs. They hold the cover in place on windy patios and decks, where a loose cover is most likely to blow off. Check price on Amazon
• A soft microfiber cloth. It is useful for wiping the cart top and lid before covering, and for drying the cover after rain without scratching the finish. Check price on Amazon

How This Fits With Your Other Grill Care

A cover works best as one part of a routine. If you are still choosing a grill or deciding where it will live, Grill Cover Buying Guide: How to Choose and Maintain One and Best Grill Covers can help you compare options. For a broader look at what to expect from your grill, Charcoal vs Gas Grills: Flavor, Convenience, Cost and Safety explains where gas fits in.

FAQ

Can I leave a grill cover on all year?

You can, if the cover is vented, fits well and you check the grill regularly. Remove it occasionally to let the grill dry out, and inspect for rust, pests and moisture after storms.

Should I cover my gas grill with the propane tank attached?

Many people leave the tank outside the cover or use a cover with a tank pocket. Close the valve at the cylinder either way, and check the hose for cracks or stiffness before the season starts.

Will a cover stop rust completely?

No. A cover slows exposure to rain and dust, but humidity can still reach metal. Regular cleaning, drying the grill after rain and fixing small rust spots early do more than the cover alone.

How do I know if my cover is the wrong size?

Signs include flapping in light wind, pulling tight across the lid, or gaps at the sides and rear. Re-measure with side tables and hoods included before buying a replacement.

Is it safe to grill with the cover nearby?

Remove the cover completely before lighting the grill and keep it well clear of heat sources. Never use a cover, towel or fabric to smother flames. If you notice a gas smell or suspect a leak, shut off the tank and contact a qualified professional.