Loft Floor Feels Bouncy
The floor in a loft conversion feels springy or bouncy when walked on, sometimes with visible flex.
What Is Causing This?
- 1Floor joists undersized for the span and load
- 2Joists not properly strutted or braced
- 3Original ceiling joists used as floor joists without reinforcement
How Urgent Is This?
This should be fixed in the coming weeks. Leaving it may allow the problem to worsen and cost more to repair.
What Needs to Be Done
A loft conversion specialist will assess the joist sizes and spans, and add additional joists, strutting, or steel beams to stiffen the floor.
How Much Will It Cost?
National average estimate
Labour: £16,667 – £33,333 | Materials: £8,333 – £18,333
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Prices are estimates based on typical UK rates. Actual costs depend on the specific issue, accessibility, and your location. All quotes from tradespeople on Tradesfolk are completely free.
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Ask a QuestionHow to Prevent This
Ensure the structural design is done by a qualified engineer. Do not skimp on floor joist specification. Have the floor checked if you notice bounce after conversion.
Related Problems
Other Loft Conversion Specialist Problems
A loft conversion room that is noticeably colder than the rest of the house, even with the heating on.
Moisture forming on windows, walls, or the inside of the roof slope in a loft conversion.
The loft conversion becoming uncomfortably hot in summer, making it difficult to use or sleep in.
The staircase to the loft conversion feels dangerously steep or does not meet building regulations.