Since I wanted to focus completely on the pattern of the snow on and in between the roof tiles, I went with this hard contrast conversion based on the film noir 2 preset from NIK Silver Efex Pro 2. Removed some distracting things under the roof in GIMP.
I tried correcting perspective in DxO, but that did not yield usable results (I think this is a little manually corrected version for verticals). Shot taken at an awkward angle because the house is not standing freely, this was the only angle I could really take. I like how it turned out, what do you think?
Roof, Snow, Wind