Lally Column Replacement and Installation: Tips for New England Homeowners

If you live in New England, you’ve probably heard about Lally columns, even if you’re not quite sure what they do. These sturdy basement supports hold your home safely above ground, protecting you and your family. But how can you tell if your columns need attention? We’re here to answer that question and help you keep your basement safe and strong.
Understanding Lally Columns: What Are They?
A Lally column—sometimes mistakenly spelled “lolly column”—is a steel column filled with concrete that’s installed in basements or crawl spaces to help support the weight of your home. Originally invented by John Lally in the early 1900s, these columns have become essential components in homes across New England, providing reliable structural support to beams and floors.
Why Do New England Homes Have Lally Columns?
Homes throughout New England often rely on Lally columns due to their sturdy design, affordability, and long-lasting durability. Basements in this region commonly experience interior leaks and high humidity, conditions that can lead to rust and corrosion in structural supports. Lally columns can resist these conditions for many years, but even they will deteriorate over time.
How to Tell if Your Lally Column Needs Attention
Knowing when a Lally column repair or replacement is needed is critical to maintaining your home’s safety. Common signs include:
- Rust or corrosion, especially near the bottom of the column
- Visible cracks in the concrete or steel
- The column appearing bent or leaning slightly
- Crumbling or damaged concrete footing beneath the column
- Sagging or failing floor joists above the column

If you’re noticing any of these signs, it’s important to consult a professional who understands structural issues common in New England homes.
The Replacement and Installation Process Explained
Replacing a Lally column typically involves several careful steps, usually completed by a professional contractor:
- Assessment and Temporary Support: Temporary supports are placed to safely carry the load of your home’s beams during replacement.
- Lally Column Removal: The damaged column is carefully removed, sometimes requiring breaking out concrete around the base.
- Installing a Permanent Lally Column: A new column is positioned precisely on a stable footing, then securely attached to the beam above.
- Final Inspection and Finishing: After securing the column, concrete flooring is repaired, ensuring the basement returns to a safe and finished condition.
Replacing or repairing Lally columns involves precise structural calculations and careful handling of heavy materials. It’s critical to ensure any work on these important structural supports is done correctly and safely. Consulting a professional ensures you receive guidance tailored specifically to your home’s needs.
Alternative Solutions to Support Your Basement

While Lally columns are a strong and reliable option, there are other ways to support your basement. If you’re looking for more ways to fix or strengthen your basement, here are some helpful solutions.
Options such as steel I-beams, wall anchors, and carbon fiber reinforcements can effectively support your basement walls and foundation. Each of these solutions offers unique benefits and can address specific structural issues your home might face.
Want to learn more about basement wall repair solutions? Read our guide: 4 Steps for Repairing a Basement Wall.
Groundworks: Your Trusted Experts in New England

Groundworks specializes in comprehensive basement and foundation repair solutions designed specifically for the unique challenges faced by Northern and Southern New England homeowners. Our knowledgeable local experts provide guidance and custom solutions tailored to your home’s specific structural needs. If you have questions or concerns about your home’s basement or structural health, reach out to Groundworks—your trusted partner in maintaining a safe and stable home.
Lally Column FAQs
Adjustable columns are designed for temporary use and shouldn’t replace permanent supports. For lasting stability, always use properly installed permanent Lally columns or other structural solutions.
Yes, many homeowners finish basements around existing Lally columns. Just make sure they remain accessible for inspection and aren’t covered in a way that traps moisture.
Yes, proper anchoring at both the top and bottom is essential to keep the column stable and ensure it carries the load safely. This is a key part of professional installation.