Barrel-aged beers are wonderful, but barrels are also expensive, time-consuming, and take up a lot of space. With the wide array of oak alternatives available, they are also unnecessary. Explore the alternatives to barrels.
Brewers often add adjuncts right into the main batch of beer before or during fermentation with the hopes that the characteristics of the beer will play nicely with the additive. But Michael Tonsmeire explains that fermenting the two separately may sometimes be your best approach.