Timber stairs rotten

Cause

Moisture is trapped at string/tread junction

Repair

  • replace damaged timber – where the timber has insufficient treatment further damage will occur, so consider replacing the stairs

Cause

Wrong level of treated timber 

Repair

  • replace damaged timber – where the timber has insufficient treatment further damage will occur, so consider replacing the stairs

Cause

Stair string in ground contact 

Repair

  • trim back bottom of string if rot is minor and mount on a metal bracket set into concrete pad