Technology Solutions Case Study: Excavationless: Exterior-Side Foundation Insulation for Existing Homes
Building science research supports installing exterior (soil side) foundation insulation as the optimal method to enhance the hygrothermal performance of new homes. With exterior foundation insulation, water management strategies are maximized while insulating the basement space and ensuring a more even temperature at the foundation wall. This project describes an innovative, minimally invasive foundation insulation upgrade technique on an existing home that uses hydrovac excavation technology combined with a liquid insulating foam. Cost savings over the traditional excavation process ranged from 23% to 50%. The excavationless process could result in even greater savings since replacement of building structures, exterior features, utility meters, and landscaping would be minimal or non-existent in an excavationless process.
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- OSTI Identifier:
- Report Number(s):
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- Sponsoring Org:
- USDOE Office of Energy Efficiency and Renewable Energy (EERE), Building Technologies Office (EE-5B) (Building America)
- Country of Publication:
- United States
- residential; Residential Buildings; NorthernSTAR; Building America; Thermal enclosure; walls below grade; foundation insulation; liquid insulating foam; hydrovac excavation technology
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