Removing a wall is one of the quickest ways to make a home feel bigger and brighter. Open-plan kitchens, wider living spaces, and better flow can completely change how a house works for day-to-day life. But if the wall you want to remove is load-bearing, it’s not a simple job. That wall may be holding up floors, ceilings, or part of the roof. Taking it out without proper support can cause cracking, sagging, or serious structural problems. That’s where RSJs come in.

What is a load-bearing wall?

A load-bearing wall supports weight from above. This could be:

• A floor above

• Another wall above

• Roof timbers

• Heavy brickwork or chimney sections

Not all solid-looking walls are load-bearing, and not all thin walls are safe to remove. You can’t always tell just by looking, which is why proper checks matter before any work starts.

Why you can’t just knock it down

When a load-bearing wall is removed, the weight it was carrying still needs support. If nothing replaces that support, problems can follow, such as:

• Cracks in walls or ceilings

• Uneven or bouncing floors

• Doors and windows sticking

• Long-term movement in the structure

This is why load-bearing walls are replaced with structural support, not simply removed.

What is an RSJ?

An RSJ (Rolled Steel Joist) is a steel beam that takes over the job of the wall being removed.

Instead of the weight travelling down through the wall, it’s carried by the RSJ and transferred safely to strong points at each end, usually external walls or solid supports.

Put simply:

• Wall comes out

• RSJ goes in

• The house stays supported

But it only works if the RSJ is the right size and installed properly.

Why RSJs aren’t one-size-fits-all

Every house is different. The RSJ needed depends on:

• How wide the opening is

• What’s above the wall

• How many floors the load passes through

• What the beam is supported by at each end

That’s why structural calculations are often required. They make sure the beam is strong enough and won’t cause problems later.

Using the wrong beam or cutting corners might not show straight away, but issues often appear months or years down the line.

How load-bearing walls are removed properly

When done the right way, the process usually looks like this:

1. Checking the wall

The wall is assessed to confirm whether it’s load-bearing and what it’s supporting.

2. Specifying the RSJ

A suitable beam is chosen based on the structure of the property, often with input from a structural engineer.

3. Temporary support

Before the wall is removed, temporary props are installed to hold the weight safely.

4. Creating solid supports

Strong bearing points are formed at each end of the opening so the RSJ has something solid to sit on.

5. Installing the RSJ

The beam is fitted, levelled, and secured so it does its job properly.

6. Making good

The opening is finished neatly so it blends in with the rest of the home.

7. Building Control checks

Building Control may inspect the work to ensure it meets regulations.

Skipping steps is where problems start.

Building Regulations: why they matter

Removing a load-bearing wall usually falls under Building Regulations. This isn’t just paperwork — it’s about safety.

Building Control checks that:

• The beam is suitable

• The supports are correct

• The structure is safe long-term

Without proper sign-off, you could face issues when selling your home.

Common mistakes to avoid

Problems often come from:

• Using an undersized RSJ

• Poor support at the ends of the beam

• No temporary support during the work

• Rushing the job to save time or money

• Ignoring Building Control requirements

These shortcuts can end up costing far more to fix later.

How much does it cost?

There’s no fixed price. Costs depend on:

• Size of the opening

• Type of RSJ needed

• Access into the property

• Extra structural work required

• How much finishing work is involved

A clear quote that explains what’s included is always better than a cheap price with gaps.

Choosing the right builder

If you’re planning this kind of work, ask:

• Who is specifying the RSJ?

• Will Building Control be involved?

• Is the work insured?

• What’s included in making good?

A good builder will explain things clearly and won’t cut corners.

How TD Property Renovations handles RSJ work

At TD Property Renovations, RSJ installations are treated as proper structural work, not quick knock-throughs.

The focus is on:

• Careful assessment

• Correct support and installation

• Compliance with regulations

• Clear communication throughout

Because we also carry out full renovations, garage conversions, and extensions, RSJ work is planned as part of the bigger picture.

FAQs

1. How do I know if a wall is load-bearing?
You can’t always tell by looking. A proper check is needed before any wall is removed.

2. What is an RSJ?
An RSJ is a steel beam that supports the weight a load-bearing wall used to carry.

3. Do I always need an RSJ to remove a load-bearing wall?
In most cases, yes. Some form of structural support is almost always required.

4. Do I need Building Control approval?
Yes. Removing a load-bearing wall usually requires Building Regulations approval and inspection.

5. Can I remove a load-bearing wall myself?
No. This is structural work and should always be handled by experienced professionals.

6. Will removing a load-bearing wall cause cracking?
Not if it’s done properly. Cracks usually appear when the beam is undersized or poorly installed.

7. How long does RSJ installation take?
Most installations take one to two days, depending on the size of the opening and access.

8. Will my home be messy during the work?
Some disruption is normal, but a good builder will protect floors and keep the site tidy.

9. Does an RSJ need to be boxed in?
Yes. Steel beams usually need to be covered to meet fire and building regulations.

Summary