Winterizing Your Outdoor Kitchen: A Missouri Homeowner's Checklist

1. Drain and blow out water lines

If your outdoor kitchen has a sink or wet bar, any water left standing in the supply line will freeze and can split a copper or PEX line the first hard freeze of the season. Shut off the water supply to the outdoor line, open the fixture to relieve pressure, and blow out remaining water with compressed air if the line doesn't have a low-point drain. This is the single most damage-prone item on the list if skipped.

2. Shut off or purge gas lines per manufacturer spec

For a natural gas line run, most manufacturers recommend shutting off the supply at the appliance valve for the season rather than leaving it live and unused — check your specific grill or pizza oven's manual, since some built-in units have different guidance. If you're using a propane tank, disconnect and store it away from the appliance. Don't assume "gas lines are fine, they're underground" — the appliance-side connections and valves are what's exposed.

3. Cover appliances with breathable covers, not plastic tarps

This trips up more homeowners than any other item. A cheap plastic tarp seals in whatever moisture is already on the appliance and traps condensation underneath all winter — which is worse for a stainless grill or pizza oven than leaving it uncovered. Use a fitted, breathable grill or appliance cover (typically a treated polyester or vinyl-backed fabric designed for outdoor cooking equipment) that sheds rain but lets moisture escape.

4. Seal porous natural stone countertops before winter

Unsealed or under-sealed natural stone (granite, limestone, some porcelain-look composites) absorbs moisture. When that moisture freezes and expands inside the stone through repeated freeze-thaw cycles, it can crack or spall the surface over a few winters. A penetrating sealer applied in fall, before the first freeze, is cheap insurance — plan on reapplying every 1-2 years depending on the stone type and how much winter sun and moisture exposure the counter gets.

5. Check for cracked mortar joints each spring

This is a spring task that starts as a winter problem: after a Missouri winter's freeze-thaw cycles, walk the masonry — mortar joints between veneer stone or block — and look for new hairline cracks. Caught early, a cracked joint is a small tuckpointing repair. Left through another winter, water gets behind the veneer and the repair gets bigger and more expensive.

6. Remove and store cushions and electronics

Outdoor cushions, any integrated speakers or electronics, and small countertop appliances (blenders, warming trays) should come inside for the winter. Even "weather-resistant" fabric and electronics degrade faster through repeated freeze-thaw and humidity cycles than most people expect.

Building winterizing into the design from the start

A well-designed outdoor kitchen makes this checklist faster every year — a proper low-point drain on the water line, accessible gas shutoff valves, and stone that was sealed correctly at install all cut winterizing down to an afternoon instead of a project. If you're still in the design phase, see best materials for St. Louis humidity and freeze-thaw for what to spec from the start.