Moisture Management in Earth Sheltered Homes
How Much Moisture is Okay in Walls?
Earth sheltered homes are constructed partially or entirely underground, relying on natural thermal insulation to maintain comfortable temperatures within the building. While this design provides many advantages, it also raises concerns about moisture management. Excess moisture can compromise the structural integrity of the home and create ideal conditions for mold growth.
In general, moisture levels in walls should be kept below 15%. Regular monitoring is crucial to ensure this level is maintained. It is recommended to invest in a moisture meter to accurately measure moisture content. If moisture levels exceed 15%, immediate steps should be taken to address the issue and prevent further damage.
Several factors contribute to moisture accumulation in earth sheltered homes, including:
- Infiltration of rainwater through cracks or gaps in the walls
- Condensation on cold surfaces
- Vapor diffusion from the ground or indoor sources (e.g., cooking, bathing)
To prevent moisture buildup, a comprehensive moisture management plan is essential. This may include the implementation of the following measures:
- Proper drainage systems to divert water away from the building
- Sealing cracks and gaps in walls with a waterproof sealant
- Installing a vapor barrier to prevent moisture migration from the ground
- Using mold-resistant building materials
- Promoting adequate ventilation to reduce condensation
Regular inspections and maintenance are also essential for ensuring long-term moisture management. By addressing potential moisture issues promptly, the durability and comfort of the earth sheltered home can be preserved.