Joist span and why bounce is not a flooring problem
Springiness underfoot in a terrace usually comes from the joists themselves, whether that is span, spacing, previous notching for pipework, or simple age-related sag, rather than anything to do with the board or covering above. Flooring cannot correct a structural joist issue, so it needs identifying separately during the survey.
- Notching for old pipework or cables can weaken a joist over time
- Joist spacing in original terrace construction sometimes falls short of what current guidance expects
- A structural opinion is worth getting where bounce is pronounced rather than fitting over it



