Are Earth-sheltered Homes Cheaper to Build?
Are Earth-sheltered Homes Cheaper to Build?
In theory, earth-sheltered homes can be a cost-effective and eco-friendly alternative. However, in practice, numerous challenges can arise, especially in already built-up environments. Here, we explore the potential benefits and drawbacks of constructing these homes, focusing on cost-effectiveness and feasibility.
Design and Construction of Earth-sheltered Homes
The envisioned earth-sheltered homes are designed as a "pipeline" style structure utilizing 12-foot diameter pipes, laid in a trench approximately 6 feet deep. The concept includes creating individual family units or apartments using a separating wall every 30-40 feet. This modular approach aims to simplify construction and ensure easy scaling of the project.
Construction Process
The construction process begins by excavating a trench to a depth of 6 feet. The pipe, treated externally to ensure watertightness for a century, is then placed in the trench. Utility lines are installed above grade, and the excavated soil is used to provide insulation against the earth. A 2-1/2-foot floor is covered with flooring material, creating a central aisle of approximately 6-7 feet in width. The utilities are placed beneath the flooring, and the WC outlets need to be positioned above the centerline, requiring elevated fixtures.
Practical Considerations
While the concept of earth-sheltered homes presents a cost-effective approach due to the absence of exterior finishes, several practical challenges must be considered:
No Availability of Contractors: Finding a contractor experienced in earth-sheltered home construction may be challenging, as such projects are rare. Permitting Issues: City and municipal regulations can create significant hurdles, particularly with obtaining necessary permits for such unconventional structures. Funding Difficulties: Banks may be reluctant to provide financing for innovative, non-traditional housing projects. Resale Value: Earth-sheltered homes may not have high resale value, making them less appealing to potential buyers.Cost Analysis
To achieve the potential cost savings, earth-sheltered homes must minimize construction and material costs. The use of pipes for building structures can potentially reduce costs, as pipes are cheaper and easier to handle than traditional building materials. However, the variables and challenges mentioned above significantly impact the overall cost-effectiveness of such a project.
Economic Viability and Sustainability
From an economic perspective, the concept of earth-sheltered homes offers several advantages, including lower maintenance costs, energy savings, and reduced environmental impact. However, these benefits need to be weighed against the practical challenges discussed earlier.
Conclusion
While earth-sheltered homes have the potential to be cheaper to build in theory, the implementation of such projects is fraught with challenges. Despite these obstacles, the concept remains a promising avenue for sustainable living and cost-effective construction in the future.