How to Store Cask Ale Properly

Last updated: 26 June 2026

Most pub licensees don’t realise their cask ale is losing condition the moment it arrives—not because they’re negligent, but because they’ve never been shown what “proper storage” actually looks like in a working pub cellar. Cask ale is temperamental. It needs cool, stable conditions, upright positioning, and the right handling from tap to glass, or your GP quietly evaporates into poor pours, oxidation, and waste. A 1% stock loss on wet sales quietly costs a typical pub £3,000–£5,000 a year—and a significant chunk of that loss lives in the cellar, not at the till. This guide tells you exactly how to store cask ale so it stays sellable, tastes right, and your margins stay intact.

Why Cask Ale Storage Matters to Your Bottom Line

Cask ale is alive. It contains yeast, tannins, and bacteria in equilibrium. The moment you breach that equilibrium—through heat, cold shock, movement, or time—the ale degrades. It doesn’t always show. A cask that’s been stored warm might pour flat and thin three weeks in, but you won’t know until a customer complains. By then, you’ve already discounted it, poured it away, or watched your GP erode point by point.

The number that actually matters is wet GP by line, not a single headline stock figure. Most pub operators look at total stock as a percentage of turnover. That’s almost useless. What you need to see is: for every pint of cask ale I sold this week, how much of the money stayed in my pocket? Storage, condition, and waste all feed directly into that answer.

When I first took over my pub, I was running stock on a tangle of spreadsheets and still losing track of partial kegs and the age of every cask sitting in the cellar. I built a simple count routine around a dipstick and a set of scales, and within a fortnight, the weekly variance went from guesswork to a number I could trust. That precision meant I could see immediately which casks were drifting, which lines were losing condition, and which suppliers’ ales were sitting too long before they moved. That visibility is what stops a 1% loss becoming a 3% loss.

Temperature Control: The Non-Negotiable Foundation

Cask ales live or die on temperature. Too warm, and the yeast remains active, producing off-flavours and causing over-carbonation. Too cold, and the yeast becomes dormant but doesn’t die—it just goes to sleep. Swing between the two, and you’ll get both problems at once.

The most effective way to store cask ale is in a dedicated cellar space maintained at 50–54°F (10–12°C) with minimal temperature fluctuation. That range keeps the yeast stable, allows natural conditioning to continue at the right pace, and prevents spoilage. Most UK pub cellars sit naturally in that range if you’re not actively heating them—and that’s the first thing you check when you take over a pub.

Checking Your Cellar Temperature

Get a max-min thermometer. It costs £3–£5 and shows you the highest and lowest temperature your cellar reached over the past 24 hours. Place it in the warmest spot—usually near the door or near any heating pipes—and check it daily for the first week after arrival. If your highs are consistently above 56°F or your lows are below 48°F, you have a problem.

Common culprits:

• External cellar doors left open – surprisingly common during service when staff are moving kegs.
• Heating pipes running through the cellar – many older pubs have radiators or boiler pipes in the cellar. Box them off or wrap them with insulation.
• Ventilation blocked – a cellar needs air flow to stay cool. If you can’t get natural cool-down at night, you need a fan or an extractor.
• Direct sunlight through a cellar window – less common, but it happens. Black-out the window if it’s an issue.

If your cellar runs cold—below 48°F—that’s often an old stone or concrete basement in a rural pub. It’s not ideal, but it’s stable. The yeast will condition more slowly. You’ll just need to account for longer shelf life and be more cautious about tapping too many ales at once.

Positioning and Handling Your Casks

Cask ale should arrive upright on a dray. It should stay upright until it’s tapped. That’s the rule. Casks knocked on their side or tilted compress sediment, encourage oxidation, and make the ale cloudy and thin when it pours.

Setting Up Your Stillage

A stillage is a wooden or metal frame that holds your casks upright. It should be level—literally use a spirit level—and sturdy enough that a cask doesn’t rock or shift when a staff member leans against the frame or moves another cask nearby. If your stillage is secondhand or inherited, check the legs and cross-supports. A tilted stillage will cause settlement issues and uneven drinking-out.

Spacing matters too. Leave at least 3–4 inches between casks so you can inspect them, dip them, and clean around the tap and shive (the bung at the top). A crowded cellar is a cellar where you miss slow leaks and oxidation.

The 24-Hour Rest Rule

When a cask arrives, it’s been moved, jostled on the dray, and had sediment stirred up. Let it rest upright in your stillage for at least 24 hours before tapping. This allows the sediment to settle back to the bottom. Tap it too soon, and your first few pints will be cloudy and unpleasant. Your customers will complain, you’ll have to remake their drinks, and you lose money.

I once saw a licensee tap a cask within 2 hours of it arriving because he was desperate for stock on a Saturday afternoon. The ale came out hazy. He discounted it 20p per pint to shift it, which meant every pint he sold that evening made him less money than expected. By the time it cleared up 36 hours later, he’d already damaged his reputation with regulars who’d tasted it cloudy.

How to Manage Cask Condition and Ullage

Ullage is the space at the top of a cask. When a cask is full, there’s almost no ullage. As you sell from it, the ullage grows. An ale with high ullage (a lot of air space above the liquid) will oxidise faster, lose condition, and begin to taste stale or vinegary. You need to see this coming.

Cask ale requires a weekly dip and weight check because the volume of liquid left directly determines how long it stays sellable. A dipstick—a simple measuring rod marked in litres—tells you how many litres remain in the cask. A set of bathroom scales (placed under the cask or a portion of it) tells you the approximate weight. Cross-reference the two against a dipping chart provided by your brewery, and you know if the cask is on track to sell out before it oxidises, or if it’s going to sit for another two weeks and gradually turn to vinegar.

Reading a Cask Dip

Insert the dipstick vertically into the cask through the shive (the hole you bung after tapping). Lower it until it touches the bottom. Pull it out and read where the wetness ends on the measurement scale. That’s your remaining volume. Do this the same day each week—Tuesday morning works well—and log the number.

If a cask drops from 40 litres to 20 litres in one week, you’re pouring 20 litres per week. At that rate, you’ll finish it in two weeks. Fine. If a cask drops from 40 to 38 litres in a week, you’re only pouring 2 litres. It will take 20 weeks to empty. That ale will be undrinkable long before then.

When to Sell Off or Discard

If a cask has more than 15–20 litres of ullage remaining and it’s been in the cellar for more than three weeks, it’s at risk. You have two options: discount it aggressively to move it faster, or discard it before it becomes a problem. Discounting costs you margin. Discarding costs you stock. It’s a call based on how much time you have left before it goes vinegary.

Most breweries (and your rep) will take back a spoiled cask within the first week. After that, it’s your waste. Keep records of every cask you return and why. Over time, patterns emerge—certain suppliers, certain ales, certain seasons. That data is gold. It tells you which ales not to stock as heavily, or which suppliers to push back on about delivery timing.

Weekly Checks and Record-Keeping

A weekly check is not optional. It’s the difference between running a pub and hoping a pub runs itself. Every Tuesday (or whatever day you choose), walk the cellar with a notebook or—better yet—with StockTap pub stock app on your phone, and record three things for every cask:

• Dip – remaining volume in litres
• Weight – estimated weight (useful for spotting leaks)
• Condition – a one-word note: sound, flat, hazy, vinegary, or leaking

That’s it. Five minutes per cask. Fifteen casks takes an hour. Do it the same day each week and you build a trend line. Within a month, you can see which casks are underperforming and which ales are sitting too long.

One operator insight that only someone running a cellar knows: a cask that loses weight without losing volume (i.e., the dip stays the same but it feels lighter) is leaking. The volume inside is correct, but beer is weeping out slowly through the wood. Catch this on week two, pull the cask, and your loss is 2–3 litres. Miss it for three weeks, and you’ve bled out 10 litres. Weigh your casks every week.

If you’re still managing this on a spreadsheet, you’re leaving money on the table. SmartPubTools has built a cellar management screen into its stocktake system so you’re not switching between three different systems. But the principle is the same whether you use paper, a spreadsheet, or software: discipline beats system every time.

Common Storage Mistakes That Cost Money

Stacking Casks on Top of Each Other

I’ve seen this in pubs with small cellars. Two casks stacked to save space. It’s a false economy. The weight of the top cask compresses the ale, accelerates settling, and can distort the cask itself. If you don’t have space for all your stock upright, you don’t have room for that much stock. Reduce your order or find a bigger cellar.

Mixing Old and New Stock

Always tap new stock and move the older, partially full casks to the front of the stillage. This is called FIFO (first in, first out). It sounds obvious, but it’s incredibly common for staff to tap a new cask and leave the old one sitting. Three weeks later, you’ve got a half-empty cask of bitter that tastes like toast, and a full cask of bitter that’s perfect. You discount one and pour the other away, and nobody mentions it.

Tapping Multiple Casks of the Same Ale at Once

If you tap three casks of bitter in the same week because you’re expecting a busy Saturday, and Saturday is quiet, you’ve now got three casks with high ullage, all at risk. Tap conservatively. Add casks as demand shows, not in anticipation of demand. This one mistake probably costs more money than any other in cellars I’ve seen.

Neglecting Line Cleaning

This isn’t strictly storage, but it lives in the same world. Draught line cleaning is a weekly job. Lines full of old beer, yeast, and bacteria will make every ale you pour taste sour or musty, no matter how well you stored the cask. You’ll pour half a pint away before customers will drink it. Every week, every line, pull through with appropriate line cleaning solution. This alone protects your GP more than almost any other single discipline.