Frost-Protected Shallow Foundations for Garages
By DIY Eco Homes | Published: 5/12/2025
Learn how Frost-Protected Shallow Foundations can simplify building unheated garages in cold climates while saving costs and preventing frost heave.
Frost-Protected Shallow Foundations for Garages Frost-Protected Shallow Foundations (FPSF) are a cost-effective and efficient way to build unheated garages in cold climates. By using rigid foam insulation to prevent frost from reaching the soil, FPSF reduces the need for deep excavation, saving time and money. Here's what you need to know: - How It Works: Insulation creates a thermal barrier, trapping ground heat and preventing frost heave. - Benefits: Less digging, lower material costs, and easier installation compared to traditional foundations. - Planning Essentials: - Use proper insulation (EPS or XPS) for your climate and soil type. - Ensure good drainage and compact the base soil. - Follow local building codes(/blog/10-common-zoning-issues-for-diy-home-builders) for insulation placement and concrete specs. - Costs: For a 24' x 24' garage, expect $7,168–$9,200, including materials, labor, and permits. FPSF is ideal for cold-weather garage construction, offering durability, cost sa...
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