My house is the only one in the neighborhood with icicles - why?

[micky]

I'll bet you it's not. Have both halves always been owned by the same person? If not, one added insulation and the other didn't. How old is it?

[Ed Pawlowski]

Also can vary with sun load. One side sunny, the other not.

Insulation and attic ventilation are big factors but even the temperature in the living space is a factor. Higher temps means more heat to the attic.

[Leo Isenteze]

[Rod Speed]

By using that f***ed site which doesnt make it very obvious to those who don't read it carefully how old most of the posts are.