By the early 1990s, Rwanda, a small country with an overwhelmingly agricultural economy, had one of the highest population densities in Africa. About 85 percent of its population is Hutu; the rest is Tutsi, along with a small number of Twa, a Pygmy group who were the original inhabitants of Rwanda.
1 Power sanding, stain and seal â This is a very aggressive procedure normally used on decks that have not been well kept or are changing color. The average cost is $2 to $4 per square foot.  Light sanding, stain and seal â This is a general annual treatment for a deck.
At this price point, you are comparing against wood flooring ($8-$10 per square foot) and a range of ceramic and quarry tiles ($10-$12 per square foot). Adding decorative sandblasting or engraving to the advanced stain application ($15+ per square foot).