Hidden surprises in bathrooms
Subfloors, leaks, old pipework - what's often found behind old bathrooms.
At a glance
Quick Checklist
Key points at a glance
- 1Budget 10-15% contingency
- 2Expect something unexpected
- 3Old lead pipes may need replacing
- 4Rotten subfloors are common
- 5Asbestos possible in older homes
Questions to ask your installer
Take these to your next conversation with your fitter
- 1What are you likely to find behind my old bathroom?
- 2How much contingency should I budget?
- 3What happens if you find asbestos?
- 4Who decides how to handle unexpected issues?
- 5Will you document what you find with photos?
- 6Are subfloor repairs included in your quote?
💡 Tip: A good installer will welcome these questions. If they dismiss them, that's a red flag.
💡Myth vs Reality
Common Myth
"If nothing is leaking, everything is fine"
The Reality
Slow leaks cause rot and damage over years without visible signs until you investigate.
Common Myth
"It's cheaper to leave old pipes"
The Reality
Old pipes often fail shortly after renovation. Better to replace while everything is accessible.
What to look for
- •Condition of floor joists and subfloor
- •Old lead or iron pipework that needs replacing
- •Previous leak damage and damp
- •Outdated wiring that doesn't meet current regulations
Common mistakes
- •Having zero contingency budget
- •Refusing to deal with issues when they're exposed
- •Covering up problems to 'save money'
- •Not authorising investigation work before the project
Quality considerations
- •Experienced installers can often predict what they'll find
- •Dealing with issues now prevents bigger problems later
- •Photos of hidden work are valuable records for the future
- •Honest assessment of conditions shows integrity
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This guide is written to help you make informed decisions, not to sell you anything. Always discuss your specific situation with a qualified installer.