How to Protect Your Pizza Oven Through a British Winter

Why winter is the season your pizza oven is most at risk

You bought a pizza oven for summer. The first warm weekend in May, friends over, pizzas flying out one after another, glasses topped up, the smell of woodsmoke drifting across the garden. Brilliant.

Then October comes, you cook one last pizza in the rain, you mean to put the cover on properly but it gets dark and you forget, and the oven sits there — exposed, damp, freezing through every cold snap — until April. By the time you fire it up again next spring, it's not the same oven.

British winters destroy more pizza ovens than any other factor. Freeze-thaw cycles crack stone. Persistent damp rots renders and corrodes chimneys. Animals nest in chimneys that aren't capped. UV from the occasional sunny day still degrades exposed materials. And every one of these problems is preventable with about an hour of work each autumn.

This is a practical guide to winterising a wood fired pizza oven — what to do in October, what to do mid-winter, and what to do in March before the first cook of the new season.

The three things that damage outdoor ovens in winter

1. Water ingress and freeze-thaw cycles

This is the big one. Refractory cement, brick, and most masonry materials are slightly porous. Water seeps into hairline cracks and pores. Then a cold snap drops temperatures below freezing, the water expands by 9% as it turns to ice, and that expansion forces those cracks open. The next thaw allows more water in. The next freeze widens the cracks further.

Over a single bad winter, freeze-thaw cycles can turn a hairline crack into a structural one. Over five or six winters of neglect, they can destroy an oven.

2. Persistent damp without drying out

Even without freezing, sustained damp is bad. Refractory materials are designed to be heated and dried regularly. An oven that hasn't been fired for six months and has been damp throughout is a different beast from one that's been kept dry or fired occasionally. The structure soaks up moisture, the insulation loses some of its effectiveness, and your first fire of the season has to work much harder to drive the water back out.

3. Wildlife and debris

An open chimney is an invitation. Squirrels, jackdaws and rats all happily move into pizza oven chimneys for the winter. Leaves blow in. Spiders build webs across vents. You don't notice any of this until you try to fire the oven in spring and either smoke pours out into the garden or, worse, you accidentally cremate a nest.

The autumn winterisation routine

Block out an hour on a dry afternoon in October. You'll do the following in order.

Step 1: Final clean

Build a small fire and run the oven hot for 30–40 minutes — hot enough to burn off any residual food residue from your last summer cooks. This isn't a cooking session; it's a cleaning fire. When the dome turns from grey to white inside, you're done. Let it cool overnight.

The next day, brush out all ash from the cooking floor. Use the ash shovel and brush from your tool set to clear the dome interior, the cooking floor and the lip at the entrance. Dispose of ash in a metal bin — never plastic, and never straight into a garden bin where smouldering embers could start a fire.

Step 2: Inspect

With the oven empty and cold, take a torch and look carefully at:

  • The dome interior: any cracks wider than 2mm? Any sections of render coming loose?
  • The cooking floor: any visible cracks or chips on the refractory stone?
  • The chimney junction: is the seal between the dome and the chimney still tight?
  • The exterior render or stucco: any spalling, flaking or large cracks?
  • Stand and structural fittings (if applicable): any rust, loose bolts, or castors that need replacing?

Document anything you find. Hairline surface cracks are cosmetic and don't need action. Anything wider should be assessed and, if necessary, patched with refractory cement before winter.

Step 3: Dry the structure

If the oven has any residual dampness — most likely in the insulation around the dome or in the cooking floor — dry it out with one more medium-heat fire. This is essential. You don't want to seal a damp oven under a cover for five months. Run a fire that gets the dome to 200–300°C and hold it there for 45 minutes to an hour. Then let the oven cool completely, ideally over 24 hours.

Step 4: Seal the chimney

Three options:

Best: a stainless steel chimney cap. They're cheap (£15–£25), they fit over the chimney top, they let any residual moisture escape upward while keeping water, leaves and animals out.

Good: a fitted plug or stuffed wad of wire wool inside the chimney. Wire wool keeps animals out and breathes well; rags or plastic bags trap moisture and rot.

Acceptable: a fitted oven cover that incorporates a chimney cover, like our model-specific covers.

Step 5: Cover properly

This is the single most important step. A correctly fitted, model-specific weatherproof cover is the difference between an oven that survives the winter and one that doesn't.

For XclusiveDecor ovens, we make model-specific covers that fit snugly over the dome and chimney, with adjustable straps that prevent wind lift:

Generic covers from elsewhere don't fit. They leave gaps where water pools, they're often made from thinner material that tears in wind, and they ride up in storms. The model-specific covers are heavy-duty polyester with a PVC backing — waterproof, UV-resistant, and properly fitted.

If your oven sits on a stand, also cover any exposed wood storage or shelving underneath. Damp wood stored under the oven all winter is useless wood next spring.

The mid-winter routine

An oven left sealed under a cover from October to April is more vulnerable than an oven that gets occasional attention. Do these every 6–8 weeks through winter.

Check the cover

Take a walk past the oven on the next dry day after a storm. Has the cover stayed put? Are any straps loose? Has water pooled on the top? If yes, drain it and re-secure.

Brief uncover and inspect

On a properly dry day, briefly remove the cover. Look at the dome and exterior render. Is everything still dry? Any sign of mould growth? Any new cracks or movement? Replace the cover before any rain returns.

Light a small fire (the optional but smart move)

This is what serious pizza-oven owners do that beginners don't: every 6–8 weeks through winter, fire the oven up for an hour. Just a small fire, dome reaching 200–250°C, then let it die down naturally.

What this achieves:

  • Drives out any moisture that's worked into the structure
  • Keeps the refractory in 'use' rather than letting it sit cold and damp for months
  • Gives you an excuse to cook a winter pizza or roast — because once it's hot, you might as well

If you do nothing else through winter, do this. It's the single highest-impact piece of maintenance you can perform.

The spring start-up routine

March or April, depending on weather. Plan an unhurried first cook.

Uncover and inspect

Take the cover off. Look carefully for any damage that occurred over winter. Cracks, render loss, chimney issues. Note anything that needs addressing.

Clean

Brush out any debris that's worked in despite the chimney cap. Spider webs, leaves, the occasional dead insect.

Slow first fire

Treat this like a mini cure. Build a small fire first — about 60% the size of a normal pizza fire — and let it burn out, drying the structure. Then build a second, larger fire and bring the oven up to full pizza temperature over 45 minutes rather than the usual 25.

You'll probably see some steam escaping from the exterior on the first fire — that's moisture leaving. Normal.

Re-cure if neglected

If the oven has been completely uncovered all winter, or if you haven't fired it for more than 6 months, treat the first three days like a re-cure: small fire day 1, medium fire day 2, full pizza fire day 3. Don't go from cold-and-damp straight to 450°C — you risk cracking the dome.

Specific tips for different ovens

Freestanding ovens on stands (like the Royal with Stand): check the castors. Damp British winters can cause castor bolts to seize. Loosen, oil, and re-tighten in spring.

Ovens with side tables or workspace (like the Premier with Stand and Side Table): wipe down and oil any wooden side surfaces. UV and damp degrade exposed wood quickly.

Portable ovens: if you can, bring them into a shed or garage for winter. The whole point of a portable oven is that you can move it — winter storage is the time to use that flexibility.

Integrated outdoor kitchens (like the Napoli): cover the pizza oven and the BBQ separately. Don't try to throw a single tarp over everything — it won't fit properly and you'll get water pooling and damp issues in places you can't see.

The cost of getting it wrong

A neglected winter typically does £200–£500 of damage to a quality pizza oven: cracked render needing repair, a corroded chimney needing replacement, occasionally a damaged cooking floor requiring re-pointing.

The cost of getting it right: about £180 for a proper cover, £25 for a chimney cap, and one hour of your time each October. The maths is so obvious it shouldn't need writing down — but every spring we hear from customers who didn't cover their oven properly and are now looking at costly repairs.

Common winterisation mistakes

Using a tarp or generic cover. They don't fit properly, they trap moisture, and they tear in storms. Always use a fitted, model-specific cover.

Covering a damp oven. Always dry the structure with a final fire before sealing it for winter. A damp oven under a cover stays damp until April.

Leaving the chimney open. Animals, water, debris. Cap it.

Storing wood under or against the oven. Damp wood next spring. Move it to a dedicated dry store.

Going from cold-and-damp to 450°C in one fire. Cracks the dome. Always re-cure over 2–3 days if the oven has been completely cold and damp for months.

The takeaway

Winterising a pizza oven isn't complicated. One hour in October, occasional checks through winter, an unhurried start-up in spring. Do this every year and a quality handmade oven — like any of the XclusiveDecor range — will last you twenty-plus years.

Skip it and you're effectively shortening the life of a several-thousand-pound investment to save yourself one afternoon a year. Don't.

And if you bought your oven without a proper cover, fix that before the temperatures drop. Browse our covers — they're model-specific, heavy-duty, and the best £179 you'll spend on pizza-oven maintenance.

Back to blog