Roofing felt (Liskeard PL14)

I have a pop up gazebo with a solid frame and each year I buy a new cover for about £15 and that is fine . This year I thought I would put a solid roof on it and cover it with felt . I need some felt that is at least 2 metres long to see if it works . I dont mind buying a roll and 5 litres of adhesive if it does , but I dont want to buy it and then find that it does not .