Where's the Budweiser? To the Editor: I continue to enjoy your magazine and its editorial content. Compared to most of the industry press, your work is very refreshing and innovative. The May, 1990 cover gave us all a few chuckles, so I thought I'd let you in on the joke. Our shipping person has been a roofer for a number of years and I was a general contractor for many years, so when we saw the cover, we both had the same reaction: First, what is this guy doing with a tube of caulk on this new flashing? Caulking can't be expected to last in a roof environment beyond about three years, and its use is poor