My wife and I had a brick paver patio installed in 2013. Six years later it was a mess – sand had washed away from between the bricks, weeds were growing between the bricks and they were so dirty they had lost their color. My wife had kept an advertisement from Paver Protectors and they came out and cleaned the patio, the front sidewalks and brick trim, restored the sand and made everything look like new again – all for a very reasonable price. We would recommend them highly.