Internal Alterations - Supporting Floors and Creating Open Spaces

Many homeowners choose to improve their property by altering the internal layout rather than extending the building footprint. Creating open-plan living spaces, adding stair openings for loft conversions, or forming voids between floors can dramatically change how a home feels and functions.

However, these types of alterations often involve modifying or removing structural elements. That is where structural engineering becomes essential.

At Pavol Zajac Structural Engineers Ltd, we provide the structural drawings and calculations required to ensure these changes are carried out safely and in accordance with Building Regulations.

Altering Floor Structures

Floors in small residential buildings are typically formed using timber joists that span between load-bearing walls. These joists work together to support the weight of the floor and anything placed upon it. When alterations are made, such as creating openings or removing supporting walls, the load paths within the structure change.

Common situations where structural engineering is required include:

• Removing sections of floor joists to create stair openings for loft conversions

• Forming voids between floors for features such as double-height spaces

• Reconfiguring internal layouts where existing structural support needs to be modified

• Introducing steel or timber beams to carry loads where walls or joists have been removed

In these cases, new structural elements must be designed to safely transfer loads back to supporting walls or foundations.

Using Steel/Timber Beams to Support Alterations

One of the most common solutions is the installation of steel/timber beams. These beams can take over the structural role previously performed by walls or joists, allowing spaces to be opened up while maintaining the stability of the building.

Structural calculations determine the correct beam size, the loads it must carry, and how it will connect to the surrounding structure. These details are then presented in clear drawings that builders can follow during installation.

Ensuring the Structure Remains Sound

Internal alterations may appear straightforward, but even small changes can have significant structural implications. Without proper engineering input, issues such as excessive movement, cracking, or long-term structural problems can occur.

By providing accurate structural drawings and calculations, we help ensure that any alterations to floors, joists, or load-bearing elements are properly supported and safe to build.

Planning Internal Structural Changes

If you are planning to open up internal spaces, create new stair openings, or modify floor structures, professional structural engineering input is essential.

At Pavol Zajac Structural Engineers Ltd, we work alongside architectural services and construction teams to deliver structural solutions that are safe, compliant, and practical to build.

If you're considering internal alterations to your home, get in touch to discuss how we can support your project.