Extending the life of your polytunnel and adapting it to perfectly suit your needs is the secret to success for growing undercover. Repairing splits and rips before they are worsened by the wind, cleaning covers to keep the light transmission at a maximum and adding gutters to perfectly suit your gardening needs are unfortunately jobs that must be done after your tunnel is erected. 
We have curated a collection of useful sundries for any polytunnel owner, including gentle yet effective cleaning materials, tapes for every occasion, guttering and groundcover.