Dealing with Seattle's Soil Conditions: Foundation Tips

Seattle sits on a complex mix of glacial till and heavy clay. This soil can expand and contract significantly with moisture changes, which can lead to foundation settling and basement leaks.

We discuss why deep footings and proper compaction are non-negotiable for Seattle foundations. When pouring a new foundation or addition, we often recommend helical piers or specialized footing designs depending on the soil report.

Understanding the geology of your specific neighborhood is the first step in building a foundation that will last for a century. For properties on slopes, retaining walls may also be necessary to manage soil pressure. Request a consultation to discuss your foundation needs.