Foundations & Slabs


  • A man with a shovel is working on a concrete wall

Foundations & Slabs in Tonica, IL

Concrete foundations and slabs form the structural base for most residential, commercial, and agricultural buildings. At Aldana Bolton Concrete, we specialize in constructing durable, code-compliant foundations and flat slabs throughout Tonica, IL. Whether you're building a home, a garage, a pole barn, or a commercial facility, our experienced crew ensures your project starts on solid ground.

Each foundation we pour is tailored to the site’s soil conditions, load requirements, and layout. From traditional spread footings to monolithic slab-on-grade designs, we provide precision forming, reinforcing, and finishing that aligns with Illinois building codes and local engineering standards.

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Types of Foundations We Build

The soil and climate conditions in Tonica make foundation design a critical aspect of construction. We offer several foundation systems based on your site, structure, and intended use.

Spread Footing Foundations

This system uses poured footings beneath load-bearing walls, providing a wide base to distribute weight evenly. It’s ideal for homes and small buildings in areas with stable subsoils.

Slab-on-Grade Foundations

A popular option for garages, sheds, and pole barns, slab-on-grade combines footing and slab into one continuous pour. This reduces labor and provides a durable, low-maintenance base.

Pier and Beam Foundations

Used in areas with unstable soil or uneven terrain, pier and beam foundations raise the structure off the ground and support it with vertical piers and horizontal beams.

Basement Foundations

For homes requiring livable or storage space below ground, we excavate and pour full-depth basement foundations with properly reinforced walls and floors.

Each type of foundation is designed with drainage and frost protection in mind, helping prevent settling, heaving, or cracking during Tonica’s seasonal changes.

Structural Concrete Slabs

Concrete slabs serve as the floor structure for many buildings. They must be properly formed, reinforced, and poured to carry both dead load (the weight of the structure) and live load (furniture, machinery, or vehicles). We construct high-performance concrete slabs for:

Garage Floors

Garage slabs are reinforced with wire mesh or rebar and poured with control joints to prevent cracking. We ensure proper slope toward floor drains for water management.

Commercial Interiors

Warehouses, shops, and retail spaces require level, high-strength slabs that can withstand equipment and high traffic. Our commercial slab installations meet both load-bearing and flatness specifications.

Agricultural Buildings

Barns and storage buildings in Tonica need slabs that resist moisture, chemical exposure, and animal waste. We offer custom slab thicknesses and finishes suited for farm structures.

Pole Barn Slabs

For pre-engineered buildings, we pour slabs with accurate anchor bolt layouts and edge control to match the structure’s specifications.

Reinforcement and Subgrade Preparation

No slab or foundation will last without proper base preparation and reinforcement. Before we pour any concrete in Tonica, our team completes the following steps:

  • Excavation and Compaction

    We excavate to proper depth and use mechanical compactors to ensure a firm, stable subgrade. This reduces the risk of cracking and settlement after construction.

  • Gravel Base Installation

    A layer of compacted gravel improves drainage and provides a uniform surface for concrete placement.

  • Vapor Barrier Placement

    To control ground moisture, especially in basements or garages, we install a vapor barrier beneath the slab.

  • Steel Reinforcement

    Rebar or welded wire mesh is added to reinforce the concrete and reduce cracking from tension forces.

These steps are essential for structural integrity, particularly in Tonica where freeze-thaw cycles and high groundwater can compromise poorly built foundations.

Concrete Pouring and Finishing

Pouring a foundation or slab requires careful timing, skilled labor, and weather monitoring. Our crews work efficiently to ensure proper placement and surface finish. During a pour, we:

  • Place concrete evenly across the formwork
  • Use screeds and vibrators to consolidate and level the mix
  • Install control joints at specific intervals to control shrinkage cracking
  • Apply surface finishes (broom, trowel, or smooth) based on use


Once poured, the concrete is cured using moisture retention techniques to ensure strength development. We conduct final checks for flatness, edge quality, and joint placement before the slab is turned over for framing or building.

Frost Protection and Drainage Planning

Tonica’s winters make frost protection a key component of foundation design. We build below the frost line and install foundation insulation or thermal breaks where required. Drainage planning is also essential to keep water away from foundations, especially during spring melts or heavy rainfall.

Our team installs:

  • Footing drains to direct groundwater away
  • Downspout extensions and splash blocks
  • French drains or perimeter trench systems as needed


These measures protect your investment by preventing erosion, basement flooding, and frost heave.

Permitting and Code Compliance in Tonica, IL

Every foundation or slab project must comply with local zoning, soil testing, and code regulations. Aldana Bolton Concrete manages permitting, inspections, and coordination with engineers when needed. We follow Illinois residential and commercial building codes, ensuring that our work meets all strength, anchoring, and safety requirements.

Our Services

Who We Serve

Our foundation and slab services are available across Tonica and neighboring towns in LaSalle County. We work with homeowners, general contractors, commercial developers, and agricultural clients to provide start-to-finish concrete solutions.


From small residential pads to large industrial slabs, every job receives attention to layout accuracy, structural detail, and long-term performance. No shortcuts. No cut corners.


To request a quote or schedule foundation and slab services in Tonica, IL, contact Aldana Bolton Concrete today. Our team is equipped and experienced to handle everything from base preparation to final finish—ensuring your structure starts with a foundation built to last.

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