Everyone seems to think this is a good idea.Well lets think.. the most successful covers are on the market already.Shingles have oil in and on them..(poison).When singles get hot you can see,smell the oil.When bare feet animal,or human touch this black tar what will it do?Burn that's what ...Ever see road crew putting hot tar down, making new street ? Most important it leaches into the ground.Worms live in the ground birds eat worms.Cats eat birds.Shingles are also flameable There are regulations in some states.There are shingle recycling places in Oakland at least three.So no .....shingles !! Are used and made for a roofs otherwise they'd be sold in the garden department #%#*&%$.