Sun City West Foundation Investigation
Challenge
The homeowner of this residence in Sun City West, Arizona, approached us with concerns about potential foundation issues after noticing cracks in both interior and exterior walls, as well as popping floor tiles. Their main focus is on addressing the cracks in the floor and ceiling, particularly in the southern part of the house.
To address these concerns effectively, our investigation aims to evaluate the foundation's condition thoroughly. This includes conducting a manometer survey and foundation assessment inside the property. The objectives of our survey and assessment encompass several key tasks:
- Conduct a comprehensive manometer survey.
- Identify any areas of foundation or floor slab failure.
- Perform detailed visual inspections of both the interior and exterior.
- Determine the extent of any foundation issues.
- Develop a documented plan for necessary repairs, if required.
We've meticulously examined the footprint of the first floor and conducted visual inspections of both the exterior and interior of the property. During our manometer survey, we utilized advanced equipment to measure floor elevations accurately, generating a detailed topographical map highlighting any unevenness or settlement in the foundation.
Our analysis suggests potential foundation settlement in the southern, southeastern, and southwestern sections of the home, indicated by signs of stress and lower elevation readings on the topographical map. This settlement could stem from various factors such as sub-grade moisture saturation, poor drainage, or natural earth movement.
Additionally, minor foundation settlement is likely occurring in the northern and eastern parts of the house, while a minor heave pattern is observed in the northwest, possibly due to expansive clay soils.
Cracks in the concrete slab have been noted, which can lead to independent movement of sections and subsequent damage to flooring and interior structures.
In our assessment, we've adhered to the Foundation Performance Association guidelines, comparing deflection and tilt calculations against acceptable limits. Our analysis reveals that while the deflection of the slab exceeds the allowable limit, the tilt remains within acceptable parameters.
Based on these findings, we recommend implementing targeted solutions, such as concrete sealing or the application of a suitable sealant for concrete floors, to address the identified issues effectively and ensure the long-term stability of the foundation.
Solution
Arizona Foundation Solutions advocates for a comprehensive approach to address foundation settlement issues, emphasizing the effectiveness of underpinning and concrete sealing techniques. To ensure lasting stability, it's crucial to implement precise measures tailored to the specific areas experiencing movement.
Underpinning involves strategically installing piles, sturdy foundation supports driven deep into stable soil layers to bear and distribute structural loads. By precisely spacing these piles and targeting hinge points of movement, we establish a robust foundation framework. Additionally, injecting lightweight expansive polyurethane into voids beneath the slab elevates it to its optimal position, effectively minimizing settlement risks.
In areas with minor settlement, our protection plan offers a proactive solution to prevent further damage. Utilizing composite interlocking, including concrete crack stitching, reinforces fractured concrete sections. This meticulous process involves cleaning cracks, inserting carbon fiber laminate stitches, and filling gaps with polyurethane, ensuring seamless integration. For expansion joint separation issues, thorough cleaning and re-caulking with expansive filler provide effective solutions.
To mitigate moisture-related concerns, we recommend installing and modifying gutters to redirect storm runoff at least 10 feet away from the foundation. Managing moisture around the property is vital, including ensuring proper terrain grading and discontinuing irrigation near the foundation. Additionally, addressing plumbing leaks promptly and allowing sufficient time for stabilization before cosmetic repairs are essential practices.
By prioritizing these measures, homeowners can safeguard their property against foundation settlement issues effectively. With our expertise and proactive strategies, Arizona Foundation Solutions aims to provide long-term structural stability and peace of mind.
