Because of the nature of canvas, it is not inherently waterproof. This is because the fabric naturally has many, tiny gaps where the threads of the fabric intertwine, and until these expand to close the gaps, water may be able to seep through. Weather-proofing is a very easy process, and we recommend it to be done at home in the backyard before your first camping adventure. To do this, assemble the glamping tent as normal, spray over with a hose to simulate a period of rain, then leave to dry naturally. Once this has been repeated a few times, the canvas should be completely waterproof. Exposure to UV radiation reduces waterproofing, and therefore this needs to be repeated from time to time, however if you are leaving the tent erected long-term, we highly recommend using a suitable canvas reproofing product such as Bradproof Reproofing compound, especially in damp, overly humid or tropical environments. Please see our Advice for Longterm Use article.