I C Polytunnels Offer Polytunnels, Polytunnel Construction, Polytunnel Refurbishment, Retail Canopies And Polytunnel Specialist. When you’re seeking trustworthy expertise in the construction and refurbishment of polytunnels and retail canopies, I C Polytunnels is the company to which to turn. While we are based in North Yorkshire, we provide our services nationwide, including for both domestic and commercial clients.