Slab Foundations

Slab Foundations by Legacy General Contractor

DURABLE SLAB FOUNDATIONS — COST-EFFECTIVE SOLUTIONS FOR GARAGES, SHOPS, AND HOMES

Slab foundations combine the footing and floor into a single pour, providing an economical and durable foundation solution. We offer both monolithic slabs with thickened edges and raised slab foundations depending on your needs and site conditions.

Starting at $6 per square foot

5 Highlights on Slab Foundations

Monolithic pour construction

We pour footings and slab in a single operation for monolithic slabs, creating a seamless foundation.

Proper subbase preparation

Compacted gravel base and vapor barriers ensure your slab stays dry and stable.

Thickened edges for support

Slab edges are thickened to serve as integral footings, supporting wall loads.

Wire mesh and rebar reinforcement

All slabs include appropriate reinforcement to control cracking and add strength.

Control joint placement

Properly located control joints manage cracking in predictable locations.

Why Choose Our Slab Foundations

Slab foundations offer an economical, durable option for many applications. Legacy General Contractor has poured slabs for garages, workshops, pole barns, and slab-on-grade homes.

We understand the specific requirements for slab foundations in Minnesota's climate, including proper frost protection and insulation where needed.

Our slabs are finished to the appropriate specifications for each application — smooth for garages, broom finish for outdoor use, or ready for floor covering installation.

Signs You Need Slab Foundations

1. Building a detached garage or shop

Slab foundations are the most common and cost-effective choice for garages and outbuildings.

2. Constructing a pole barn

Pole barns often use slab foundations for the floor, with thickened edges where walls are located.

3. Building on a tight budget

Slab foundations typically cost less than full basements while still providing a solid, durable base.

4. Existing slab has failed

Severely cracked, settled, or heaved slabs may need complete replacement.

Our Slab Foundations Process

Step 1 — Site Prep

The building footprint is excavated to remove topsoil and reach stable subgrade.

Step 2 — Subbase Installation

Compacted gravel is placed and leveled to provide drainage and uniform support.

Step 3 — Vapor Barrier

Polyethylene vapor barrier is installed to prevent moisture migration through the slab.

Step 4 — Form and Reinforcement

Edge forms are set, and wire mesh or rebar is placed at the proper height.

Step 5 — Concrete Pour

Concrete is placed, screeded to grade, and finished to specification.

Step 6 — Control Joints

Joints are cut or tooled while concrete is still workable.

Step 7 — Curing

Slab is protected during curing to ensure proper strength development.

Brands We Use

Legacy General Contractor works with industry-leading brands to deliver slab foundations that meets professional standards for strength, durability, and finish quality.

CEMEX — ready-mix concrete

Vulcan Materials — aggregate and subbase materials

Quikrete — concrete products

Stego — vapor barriers

We use these brands because they perform consistently under field conditions. Proper material selection is part of delivering quality work.

FAQs About Slab Foundations

How thick should a slab foundation be?

Standard slabs are 4 inches thick, with thickened edges (12-18 inches) serving as footings. Heavy-use applications may require 6-inch slabs.

Do slab foundations work in Minnesota?

Yes, with proper frost protection. Options include frost-protected shallow foundations, thickened edges below frost line, or heated slab systems.

How long before I can use my new slab?

Light foot traffic is usually fine after 24-48 hours. Vehicle traffic should wait 7 days. Full cure takes 28 days.