If you’re renovating, you’ll hear these terms constantly:

“First fix” and “second fix”

Most people nod along… but don’t actually know what they mean.

What Is First Fix?

First fix is all the hidden work—done before walls are finished.

Includes:

• Electrical wiring (cables, back boxes)
• Plumbing pipework
• Heating pipework
• Structural prep

At this stage:
You won’t see much—but it’s critical.

What Is Second Fix?

Second fix is everything visible and usable.

Includes:

• Sockets and switches
• Light fittings
• Radiators
• Taps, sinks, toilets
• Doors, skirting, finishes

This is when the house starts to feel “finished”.

The Key Difference

• First fix = behind walls
• Second fix = final finishes

Why It Matters

Getting this wrong leads to:

• Rework
• Delays
• Higher costs

Example:
If you plaster before first fix is complete—you’ll end up ripping it back out.

Real Insight

Most renovation delays happen:
Between first and second fix
Because trades aren’t coordinated properly.

Bottom Line

First fix = structure and systems
Second fix = finishes and fittings

Get the order right, and your project runs smoothly.