Advanced Lager Techniques: High Gravity Brewing

Is your wort working too hard? In Part 9 of our Advanced Lager Techniques series, Escarpment Labs co-founder Nate Ferguson dives into the high-stakes world of High Gravity (HG) Brewing. While HG brewing is a fantastic tool for increasing brewery capacity and efficiency, it’s not as simple as just "brewing it stronger and adding water later." Lager yeast is notoriously sensitive, and pushing the gravity changes the rules of engagement. Nate breaks down the physiological stress placed on your yeast and how it fundamentally alters the finished beer’s soul—from the foam on top to the potential for off-flavours. In this video, we cover: — Defining HG Brewing: The different methods and why breweries use them. — Wort Chemistry: The impact on FAN (Free Amino Nitrogen) and overall nutrient availability. — Yeast Stress Factors: How ethanol, osmotic pressure, and water activity affect your fermentation performance. — The Final Result: Why HG brewing can change your beer's body, foam stability, and risk of off-flavors. Whether you're looking to scale up production or just want to understand the limits of lager fermentation, this technical deep dive is for you. Subscribe to our channel for more fermentation science, yeast insights, and pro-level brewing tips!