Interesting comments. I recently learned that most roofers now days do not remove the cellophane. However, when my house was re-roofed, the cellophane was removed on most of the shingles. It was all over my yard. Over the years I have lost a few shingles and all those coming off DID NOT have the cellophane removed. Since there is adhesive under the cellophane, I believe it does give you a better installation. I think the professionals say removing it isn't necessary since it is very time consuming. I would like to hear the unbiased opinion of some older retired roofers on this subject.