Purchasing or living in an older home in Bourbonnais, IL, is a unique privilege. Our community is proud of the small-town charm and rich history embedded in these residences. However, the character that makes these homes special often comes hand-in-hand with maintenance challenges, especially when it comes to foundation problems. Understanding these issues is crucial to preserving both your home’s value and your peace of mind.
Why Foundation Problems Are Common in Older Homes
Older homes in Bourbonnais were built using methods and materials that differ significantly from today’s construction standards. Many of the early 20th-century houses were constructed on stone, brick, or rubble foundations, as opposed to the reinforced concrete used now. Over time, these materials are vulnerable to shifting soil, groundwater, and freeze-thaw cycles typical in the Kankakee County area.
Specific local considerations:
- The region’s clay-heavy soils are prone to swelling and shrinking with changes in moisture, placing constant stress on foundations.
- Seasonal weather patterns in Illinois, particularly the repeated freezing and thawing during winter and spring, can create soil movement underneath homes.
Signs Your Foundation May Be in Trouble
It’s important for Bourbonnais homeowners, especially those inhabiting houses built before the 1970s, to watch for clues that point to foundation issues. Some of the most common warning signs include:
- Cracks in Foundation Walls or Floors: Fine, hairline cracks might be relatively harmless, but wide or expanding cracks (especially those wider than ¼ inch) can be signs of shifting.
- Doors and Windows Out of Square: If you notice old wooden doors suddenly sticking or windows not latching, it could be more than humidity—it might be foundation movement.
- Uneven or Sloping Floors: Older homes often have some charming quirkiness, but a visibly sloping floor can reveal serious shifting beneath.
- Gaps Around Exterior Doors or Windows: Daylight peeking through exterior frames where there used to be none is a red flag.
- Basement Dampness or Water Intrusion: Bourbonnais basements are prone to leaks, especially in spring or after heavy rainfall, due to foundation cracks or poor drainage.
- Separation of Walls from the House: Gaps forming between walls and ceilings, or walls pulling away from the rest of the structure, indicate movement that should be investigated.
Unique Foundation Challenges in Bourbonnais
Our central Illinois climate plays a major role in foundation stress. The shift from humid, stormy summers to frigid winters causes regular soil movement. During wet seasons, poorly drained lots (a common situation in some older neighborhoods) can become saturated, causing the soil to push up against foundations. Conversely, during drought periods, the soil can contract away, leaving foundations unsupported.
Moreover, many Bourbonnais homes built between the 1920s and 1950s have minimal waterproofing and may lack drainage systems like sump pumps or foundation drains, compounding moisture issues over decades.
Common Types of Foundation Problems
Here are several foundation problems frequently seen in older Bourbonnais homes:
- Settlement Cracks: As the soil beneath settles, parts of the foundation can sink, leading to uneven support and cracking.
- Bowing Basement Walls: Pressure from wet clay soil or hydrostatic water pressure can cause brick or block basement walls to bow inward.
- Efflorescence and Mold: White powder or fuzzy mold on basement walls not only indicates moisture penetration but may also flag hidden cracks or porous areas.
- Pier and Beam Instability: Some historic homes use wood or stone piers, which can shift or rot over time if exposed to moisture, leading to sagging floors.

Preventing Foundation Problems in Older Homes
Prevention starts with routine observation and common-sense maintenance:
- Control Water Drainage: Ensure gutters and downspouts direct water at least 6 feet away from your foundation. Address low spots around the exterior where water collects.
- Inspect and Repair Cracks: While some movement is normal, promptly fill and monitor any cracks in foundation walls or floors. If you see them widening, consult a professional.
- Install or Upgrade Basement Drainage: Sump pumps, French drains, and vapor barriers can all help keep Bourbonnais basements dry, which vastly minimizes risk.
- Regulate Moisture Levels in Soil: During extreme droughts, consider watering the soil around your foundation to prevent excessive contraction.
When to Call a Professional
Small cracks and minor sticking doors are common in old homes. However, you should contact a qualified home inspector or structural engineer right away if you notice:
- Large, jagged foundation cracks or horizontal fractures.
- Significant bowing in basement block or stone walls.
- Gaps appearing suddenly between walls or between walls and ceiling.
- Chronic water intrusion even after attempting basic solutions.
A professional inspection is always the best way to determine the scope of the problem and the right approach to repairs.
Peace of Mind for Bourbonnais Homeowners
Managing an older home’s maintenance needs can feel overwhelming, but it is key to preserving the investment and history wrapped up in your Bourbonnais residence. By learning the warning signs of foundation trouble and staying proactive with maintenance, you can enjoy the comfort and character of an older home for years to come.
If you’re considering buying in one of Bourbonnais’ historic neighborhoods, or if your current property is showing its age, keep foundation health at the front of your mind. You’ll benefit not only from a structurally sound home but also from the lasting legacy of stewardship in our community.
About the Author
Luke Anglea
Luke Anglea is SLS Home Inspections’ owner and lead inspector. Luke brings his naturally analytical mindset to home inspections along with great attention to detail. When he is not inspecting houses he enjoys hiking, reading and traveling with his family. Luke lives in Bourbonnais, IL with his wife Jessica and their four sons.






