Foundations

Below-Grade Foundation Walls Enclosing Interior Space Must Be Dampproofed

When does a basement foundation wall need dampproofing?

R406.1

Concrete Footing Size Depends on Loads, Stories, Soil, and Wall Type

How wide and thick do concrete footings need to be for a house?

R403.1.1

Exterior Footings Must Meet Minimum Depth and Frost Protection Rules

How deep do footings need to be below grade and below the frost line?

R403.1.4

Foundation Drains Are Required Around Many Below-Grade Enclosed Spaces

Is a perimeter foundation drain required around my basement or crawl space?

R405.1

Foundation Footings Must Bear on Undisturbed Soil or Engineered Fill

Do house footings have to sit on undisturbed soil, or can I pour on fill?

R401.4

Foundation Reinforcement Depends on Seismic Design, Wall Type, and Soil Conditions

When does a foundation need rebar or special reinforcement?

R403.1.3

Foundation Walls Need Proper Bearing and Footing Projection

How close to the edge of a footing can a foundation wall sit?

R403.1.1

Frost-Protected Shallow Foundations Need Approved Insulation Details

Can I use a frost-protected shallow foundation instead of digging below frost depth?

R403.3

Sill Plates Must Be Anchored to the Foundation with Proper Bolts or Approved Anchors

How are sill plates supposed to be anchored to the foundation?

R403.1.6

Waterproofing Is Required Where Severe Soil-Water Conditions Exist

When is waterproofing required instead of dampproofing?

R406.2