You get what you pay for! Although £575 isn’t cheap I must say but my shed is just over 16 months old and the roof need replacing already! Long story short the felt is extremely poor quality and has been leaking for god knows how long. My roof needs replacing as the wood is soaking wet, covered in mould and the back corner floor is also wet. The roof is now sagging and the timber supports are now bowing and the entire roof and contents are mouldy. I’d advise anyone buying one to think twice or if you do buy one the go out and buy some top quality roofing material. I fitted guttering when I first had the shed to help keep water away which is a good thing else it would only have been worse. It is going to cost me around £120 to paint the roof to seal it until spring then it will have to be stripped and rebuilt to who knows what expense. Think twice about buying, mine was a ship lap Apex roof shed. I hope this helps someone