Fireplaces, chimneys and flues


Materials for damp-proofing shall adequately resist the passage of moisture into the building.

The following are acceptable for use as DPCs:

  • Bitumen to BS 6398.
  • Polyethylene to BS 6515 (not to be used in the chimney stack above roof level).
  • Proprietary materials assessed in accordance with Technical Requirement R3.