The canvas wall tents are quite a bit roomier than your average camping tent, have 4 to 5 foot high walls and are generally 8 to 9.5 feet tall at the peak. The material is made of a lot heavier material than the average camping tent, they are generally treated with fire retardant along with water and mildew protection. These type of tents can be erected with the use of wooden ridge poles or with metal pipe as the structural component. Once the tent is set up, it can be secured to the ground using stakes along the bottom, plus guy ropes running from the eaves of the tent to nearby standing trees, or to more stakes further away from the tent. Most come with what is called a vinyl sod cloth, this is so you can seal the tent to the ground and this helps to keep the wind and small critters out.
If these tents leak at all during a rain storm, it is usually around the peak or eaves, where the canvas is touching the structural poles. The best procedure is to have a fly (or any kind of tarp) that is bigger than the tent itself, this not only helps keep the rain and snow off, but also keeps the sun off in the summer, keeping your tent much cooler. The fly also helps protect the roof from getting sparks from the chimney, and other debris from falling on top of it.
The wall tents also have an opening for a stove pipe to emerge from, called a stove jack, this can be located on the roof, back wall or on one of the sides. This allows you to have a wood cook stove inside of the tent, a bonus feature, especially when the weather starts to cool off.
The sizes range from a 8' X 10' right up to a 16' X 24', you can also get porches and additions as add-on's. The tents weigh anywhere from 35 to 95 pounds, depending on the size you get. The white tents are preferred over the darker colors because they will reflect light so much better, I lived in a brown one for a summer and it became dark in there very early in the day.
If the situation was to ever arise, having the tent set up properly, and protected some what from the wind, this kind of shelter is very livable, year round, making it a very good survival portable home. They also manufacture a lined canvas tent that is a lot warmer in the winter months to live in. As you can imagine, the insulated ones are a lot heavier than the standard ones, weighing from 110 to 195 pounds, making them a lot more cumbersome to pack, but way more comfortable in the colder months.
The picture above is from www.capitalcanvas.ca
The picture above is from www.deluxewalltent.com