Building Science Puzzles: Wine Room Weirdness-Part 2 - GreenBuildingAdvisor
Summary
This article explores the building science behind a recurring moisture issue in a wine cellar, detailing the investigation and proposed solutions.
Why It Matters
Understanding moisture management in specialized spaces like wine cellars is crucial for maintaining structural integrity and product quality. This article provides insights into building science principles that can prevent similar issues in residential construction.
Key Takeaways
- Moisture issues in wine cellars can stem from improper insulation and ventilation.
- Condensation occurs when humid air contacts cold surfaces, highlighting the need for effective climate control.
- Investigating the root causes of building issues can lead to better design and construction practices.
Building Matters Building Science Puzzles: Wine Room Weirdness-Part 2 The building science findings and the repair made to this wine room mystery By Doug Horgan | February 25, 2026 Wine rooms can be a building science challenge. More Building Matters Building Science Puzzles: Wine Room Weirdness—Part 1 Style Over Safety: What’s Wrong With Today’s Bathroom Design No Small Matter: What Makes Housing “Right”? Not Small, Just Right: The Right-Sized Home This is the second post of GBA’s Building Science Puzzles series. The first post, which you can read here, discussed the reasons for the investigation, explained the process, and shared the observations, data, and other findings that were collected. This second post, published a week after the first, details the answer, or at least a hypothesis about what is going on. There may be additional clues to the puzzle in the comments section of the first post.Our investigation started with a recurring brown drip track on a wall in a wine cellar. Further investigation found there was a puddle of water on the 6-mil plastic sheet that covered the drywall ceiling of the wine cellar. The top of the ceiling is in a vented attic in this slab-on-grade house in climate zone 4.A conversation with the construction teamYou’ve asked the original project manager if they know why plastic was installed on the ceiling, and it turns out that was part of the instructions from the wine room HVAC system.As to the gaps in the insulation, there was no good ...
