Shingle Recycling Program To the Editor: The comments by James Glover and Eric Borden (Letters, 7/99) concerning reroofing over asphalt shingles were much appreciated. In northern Vermont, where the weather is quite cold in winter but the sun is also a factor, the experienced roofers I have dealt with will not add a second layer of shingles over an old one. Regardless, all contractors involved in reroofing should be made aware of a recycling program for asphalt, fiberglass, felt, and even nails from a tearoff. Contact your local solid waste district to find out if there is one in your locale. Not only will this save landfill space and avoid tipping fees, but it also contributes in other ways because