Damp-proofing bridges and how they occur in terraces
A damp-proof course can be bridged by raised external paving, render carried below ground level, or internal alterations that were never properly detailed, and terraces that have had extensions or patios added are particularly prone to this. Identifying a bridge before fitting flooring avoids trapping the resulting moisture under a new covering.
- Raised external paving is a common way a damp-proof course gets bridged in a terrace
- Internal alterations from previous renovations sometimes miss damp-proofing detail entirely
- A bridged damp course needs addressing at source rather than working around with the flooring choice



