How To Look At A House
McGarry and Madsen's home inspection blog for buyers of
site-built, mobile/manufactured and modular homes
What is the minimum depth below ground of the foundation of a house, for either monolithic thickened edge slab or stemwall footing?
Friday, May 31, 2019
The minimum depth is 12-inches below undisturbed ground per the Residential Edition of the Florida Building Code (FBC R403.1.4) and the International Residential Code.
This applies to perimeter footings and, in climates colder than Florida, depth must be extended to below the frost line or protected from frost by another method per R403.1.4.1. The top surface of the footing should be level and the bottom not have more than a 10% (1 in 10) slope per R403.1.5.
Also, see our blog posts What are the pros and cons of concrete block versus wood frame construction? and What is the average lifespan of a house foundation? and What are the common problems of different types of house foundations? and What are the places to look for structural cracks in a house?
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To learn more about exterior walls and structures, see these other blog posts:
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