What is shoring in building construction? In simple terms, shoring is a temporary support system. It holds up a wall, floor, ceiling, or excavation while the permanent structure underneath it is removed, altered, or built. Without it, cutting into a load-bearing wall or digging next to a foundation can cause a real collapse, not just a hypothetical risk. Shoring shows up constantly in commercial construction. It’s just as important, and just as often misunderstood, in home renovation projects like basement digouts, load-bearing wall removal, and foundation repair.
This guide covers what shoring actually is and the main types used in construction today. It also covers how shoring differs from scaffolding and underpinning, and when a homeowner is likely to run into it during a renovation.
Quick Answer: What Shoring Does
Shoring is a temporary structural support installed before permanent construction, demolition, or excavation work begins. It carries the load that a wall, floor, or soil bank would otherwise be carrying on its own. Once new permanent support, like a beam, a foundation, or a retaining wall, is in place, it can safely carry that load. Then the shoring comes out.
Why Shoring Matters
Shoring exists for one core reason: to prevent collapse while a structure is temporarily weaker than normal. A wall that’s been cut open to remove a section is not carrying its original load anymore. An excavated trench next to a foundation has removed the soil that used to hold that foundation in place. Both situations are genuinely dangerous without the right support in place.
Beyond worker safety, proper shoring also protects the finished result. Undersized or missing shoring can let framing sag or drywall crack. Doors and windows can go out of alignment before the new permanent support even goes in. In more serious cases, it can lead to actual structural failure.
Types of Shoring in Building Construction
Different projects call for different shoring systems, based on what’s being supported and how much load it carries. Here are the main types used across construction today.
Dead Shoring
Dead shoring uses vertical posts to carry a load straight down to the ground or floor below. It’s the type most homeowners actually encounter. It’s what supports a ceiling or the floor above while a load-bearing wall gets cut open below it. On a smaller residential scale, adjustable steel jack posts often serve this exact purpose.
Raking Shoring
Raking shoring uses angled supports, called rakers, braced against a wall from the ground or floor below. It’s common when a wall needs support from the side rather than from directly underneath. That often happens during a renovation where the wall itself is being stabilized rather than removed.
Flying Shoring
Flying shoring, also called horizontal shoring, spans between two parallel walls without touching the ground in between. It’s used when the floor between the walls needs to stay clear. That’s common in tighter renovation spaces where a raker or vertical post would be in the way.
Vertical and Hydraulic Shoring
Vertical shoring supports the sides of a trench or excavation. It most often uses hydraulic cylinders that adjust to the trench width and keep constant pressure against the walls. This is the type most closely tied to excavation safety. It’s central to any project that involves digging near or below an existing foundation.
Soldier Pile and H-Beam Shoring
This system uses vertical steel beams, called soldier piles, driven into the ground with horizontal boards, called lagging, placed between them. It’s a common choice for deeper excavations and foundation work, since it can be built up in stages as the excavation gets deeper.
Sheet Pile and Deep Excavation Systems
For larger commercial projects, deeper excavations sometimes call for interlocking steel sheet piles, soil nails, or concrete diaphragm walls. These systems are engineered for sites with high water tables or very deep foundations. They go well beyond what a typical residential project needs, but they’re worth knowing about for a complete picture of how shoring scales with project size.
Shoring Versus Scaffolding Versus Underpinning
These three terms get confused often, and the distinction matters if you’re trying to understand what a contractor is actually doing on your project.
Shoring Versus Scaffolding
Shoring carries structural load. Scaffolding gives workers a platform to stand on. A scaffold isn’t designed to hold up a wall or a trench wall, and shoring isn’t designed for workers to stand on. They sometimes appear on the same job site, but they solve completely different problems.
Shoring Versus Underpinning
Shoring is temporary. Underpinning is permanent. Underpinning extends or strengthens an existing foundation, often to allow a basement to be dug deeper for more ceiling height. Shoring is what holds everything up safely while that underpinning work happens. On a basement digout project, you’ll typically see both. Shoring goes in first, then underpinning happens, then the shoring comes out once the new foundation work can carry the load on its own.
When Shoring Comes Up in a Home Renovation
Shoring isn’t just a commercial construction topic. It shows up regularly in residential projects across Northern Virginia, including in Chantilly and the surrounding area.
- Load-bearing wall removal: before a wall carrying floor or roof load comes out, that load has to be temporarily supported. Our load-bearing wall removal cost guide covers this specific application in more depth. It also explains why temporary shoring is a cost homeowners often leave out of their own estimate.
- Basement digouts and underpinning: lowering a basement floor to add ceiling height means excavating next to the existing foundation. That requires shoring throughout the process. Our basement remodeling guide covers what this type of project involves.
- Foundation repair: any work that exposes or excavates near an existing foundation wall needs temporary support first. That soil has been holding the wall in place, and removing it without support is a real risk.
- Second-story additions: adding a full story above an existing structure sometimes requires temporary shoring at the first-floor level while new structural support is installed. Our second-story addition guide covers the structural side of this project type.
- Egress window installation: cutting a new window opening into a foundation wall for a legal basement bedroom requires temporary support too. That support goes around the opening during the cut.
How Shoring Is Designed and Installed
Shoring isn’t something a crew improvises on site. On any project involving structural load, a structural engineer calculates exactly how much weight needs support. The engineer then specifies the shoring method, materials, and post spacing needed to carry it safely. That plan gets built and inspected. It stays in place until the permanent support, whether that’s a beam, a new foundation wall, or underpinning, is complete and can carry the load on its own. Only then does the shoring come out.
In Virginia, structural work involving shoring has to comply with the Uniform Statewide Building Code. Most jurisdictions require an engineer’s stamped drawings before issuing a permit for this kind of work. Our guide to Virginia building permits and codes covers what to expect from that process.
Common Mistakes and Misconceptions About Shoring
- Assuming shoring is only for large commercial sites. Any residential project that removes a load-bearing wall or excavates near a foundation needs it too, just at a smaller scale.
- Treating temporary shoring as optional or skippable. It’s not a nice-to-have. Skipping it, or underestimating what’s needed, is one of the more dangerous shortcuts in residential renovation.
- Assuming a homeowner can install shoring themselves to save money. Structural engineering and shoring installation aren’t DIY-appropriate. An undersized or improperly installed system can lead to real structural problems that cost far more to fix than doing it correctly the first time.
- Confusing shoring with the permanent fix. Shoring holds things up temporarily. It doesn’t replace the beam, foundation work, or underpinning that actually solves the structural problem.
What Shoring Adds to Project Cost
Shoring cost depends heavily on the project. A simple dead-shoring setup for a single load-bearing wall removal is a relatively small part of the overall project cost. A basement digout requiring underpinning and vertical shoring around an entire foundation perimeter costs considerably more. It involves more engineering, more labor, and more time. For actual cost ranges on the projects where shoring most commonly applies, see our load-bearing wall removal cost guide and our basement remodeling guide.
Why Choose JBL Construct for Projects That Require Shoring
JBL Construct is a design-build contractor serving Chantilly and the rest of Northern Virginia, led by Jay Nath. He holds an active Class A contractor license through the Virginia Department of Professional and Occupational Regulation, DPOR #2705196687. Jay brings 10+ years of hands-on residential construction experience. He treats proper shoring as a non-negotiable step on every project that requires it, not an optional upgrade.
That attention to detail matters most on the exact projects covered above: load-bearing wall removal, basement digouts, and foundation work. Jay personally oversees these structural decisions rather than leaving them to a rotating crew. JBL Construct’s work carries 5-star Google reviews. The company has managed shoring and structural support on renovation projects throughout Fairfax, Loudoun, Arlington, and Prince William counties, including homes in Chantilly.
Frequently Asked Questions
What is shoring in building construction?
Shoring is a temporary support system that carries structural load while a wall, floor, or excavation is being altered, demolished, or built. It prevents collapse until permanent support is in place.
What are the main types of shoring?
The main types are dead shoring, raking shoring, flying shoring, and vertical or hydraulic shoring for trenches and excavations. Larger commercial projects sometimes use soldier pile, sheet pile, or diaphragm wall systems for deeper excavations.
What is the difference between shoring and underpinning?
Shoring is temporary support. Underpinning is a permanent extension or strengthening of an existing foundation. On a basement digout, shoring holds everything safely in place while the underpinning work happens. It comes out once the new foundation can carry the load on its own.
What is the difference between shoring and scaffolding?
Shoring carries structural load, like the weight of a wall or the soil in a trench. Scaffolding is a platform for workers to stand on. They serve different purposes, even though both can appear on the same job site.
Do I need shoring to remove a load-bearing wall?
Yes. Before the wall comes out, the load it carries has to be temporarily supported. This is a required step, not an optional one. It’s also one of the costs homeowners most often leave out of their own project estimate.
Is shoring only used in commercial construction?
No. It’s just as necessary in residential renovation, specifically in load-bearing wall removal, basement digouts, foundation repair, and second-story additions. It’s simply done at a smaller scale than a commercial excavation or high-rise project.
Can a homeowner install shoring themselves?
It’s not recommended. Structural engineering and shoring installation require calculating actual load and specifying the right system to carry it safely. An undersized or improperly installed shoring system can lead to serious structural problems.
Now you know what shoring in building construction actually is, and where it comes up in a real renovation. That puts you in a better position to ask the right questions before a wall comes out or an excavation starts. Does your project involve a load-bearing wall or a basement digout? See our load-bearing wall removal cost guide or our basement remodeling guide for what to expect. Or schedule a free consultation to talk through your project with JBL Construct.