We just put on a 30 year Timberline roof. It was a volunteer project and it was done wrong.It was high nailed.The weather exposure was set at the red nail line and the nails are above the seal strips. We can not afford to replace it. Would it help to renail by pealing back the shingles and renailing them about 1/2 in. above the red line? Would this weaken the seal by pulling them up to nail? Is there any way to fix this? Please help!