Now there's a lot of debate surrounding storing a beer upright vs. laying it down like a wine, specifically towards corked bottles. Some "experts" have faith in the old school wine way, that a corked beer should be kept on its side in order to keep the cork from drying out, while others believe that it doesn't really matter. In our opinion, ALL beer should be stored upright. Here's why we believe so, along with some other interesting facts about storage and cork:
Cork cells are impregnated with a waxy material, called suberin, that is almost impermeable to water or gases. Cork is also buoyant due to the presence of trapped air in the cavities of the waterproof dead cells. When cut these cells act as suction-cups and become adhesive, thus making them ideal bottle stoppers.
Natural cork is sometimes prone to drying out, however we've never had any problems -- even with beers aged 10+ years upright. Today's modern plastic/synthetic, screw cap, agglomerated, technical and capsulated corks are a lot less prone to shrinkage, to the point where it's not even worth worrying about. If a beer has been both corked and capped or corked then waxed, cork shrinkage is definitely not a major concern.
The inside of the bottle already contains its own humidity level, and as a result will not dry out the portion of the cork inside the bottle if stored properly. So the idea of laying a beer down to ensure that the liquid touches the cork to prevent drying is a moot point -- remember "almost impermeable to water", the cork is not going to act like a sponge. It's the cork exposed to the open air that should be of concern, however an ample amount of humidity is all that is required to stop any exposed cork from drying out during long-term storage.
Cork problems are usually a sign of a bad cork or a cork that has passed its lifespan, not necessarily a sign of poor storage. Agglomerated corks last for about 1-3 years before beginning to disintegrate. Plastic corks eventually lose their elasticity, too. We suggest contacting the brewery to find out what type of cork they used, and its expected lifespan.
Long storage of a beer on its side can create a yeast ring (or water-mark) inside the bottle, which will not settle. Storing a beer upright will ensure that the yeast compacts to the bottom of the bottle.
The upright storage method decreases the amount of exposed beer thus slowing oxidation of the beer.
Another real good reason for not storing a beer on its side is that long exposure to the cork (especially non-taint treated natural cork) can impart cork flavours within the beer. The alcohol in beer draws out that mouldy/musty character of the cork and in fact can taint the beer. In our opinion this doesn't add any wanted complexity to the beer. Natural cork can also harbour certain fungal bacterias which are believed to create an off-flavour compound called 2,4,6, Trichloroanisole or simply TCA, which renders its victim lifeless and dull to the taste.
Many vintage beers are kept on beer shelves for quite some time before being sold. Don't you think beer stores would shelve their corked beers like wine, if they were meant to be laid-down like wine?
We've spoken to dozens of brewers, who all recommend the upright method of beer storage. Even world-renowned brewers like Chimay and Riva suggest that you store all of their beers upright.
Just because a self-proclaimed "beer expert" recommends that beer be laid-down like wine, doesn't mean that they are 100% correct. There's more than one opinion in the world, and opinions change over time.