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.
High-End Estimate: $5,000 Many variables are used by deck staining professionals to determine an overall cost-for example, how big of an area needs to be cleaned with a pressure washer, how many spindles and railings are there, does the underside of the deck need to be stained, what is the condition of the deck, what type of wood is the deck, and so ...