Fireplaces, chimneys and flues

6.8.26DPC

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.