20ft Wide Polytunnels

The below downloadable construction guides have been put together specifically to help you construct the First Tunnels 20ft polytunnel system. Whether you go for the Base Rail or Trenching version, you’ll find our guide extremely helpful. It even comes complete with QR codes which you can scan on your phone to access video instructions. Download the 20ft polytunnel construction PDF today and feel free to ask our construction team for phone assistance by contacting them here.

In order to view and print a PDF document, you will need to download the free PDF viewer from the Adobe website. Most computers come with the free Adobe Reader ® software as standard.

They're called QR codes, and we're using them to give you easy access to our construction videos...

Using the latest QR code* technology we have updated all our construction guides to give you instant access to all our construction videos.


No typing, no searching for the right video, just a simple scan (1) of the code with your smart phone and you’ll be instantly connected to that construction video (2). Perfect for when you’re outdoors and could do with the reassurance of seeing what you’ve got to do next.