Deck or Groundsheet?
Decks can be expensive to build correctly, but are very worthwhile. Groundsheets are an instant easy to transport, relatively cheap flooring system. You can make a deck to the size of your yurt or larger to give a seating area. If you make a large deck you will need some way to prevent rain water running into the yurt, the simplest way to do this is to use a groundsheet with a welded wall. This means you can also take your yurt away with you if you wish. Decks made to size need to be sealed from the ground to prevent boards opening up and allowing warm damp air to be drawn up into the yurt. Its best to use marine grade ply for this and perhaps insulate the floor as well the old camping principle of more insulation under you than over you equally applies here.
