We will continue the process described above until we show up one year and get a sense that we’re not gaining ground any more. Then we stop and talk. Generally it is not much of a challenge to get 20+ years out of a medium shake roof and 30+ years for heavies, provided it is maintained as appropriate. I have personally been on two roofs that were over 40 years old and doing great. I have also been on 12 year-old roofs that were pretty much firewood. The choice is yours.