Awesome...so many feelings in this one special shot...I love the unique petal-shaped quarter window, it's stunning...and the mountains in the back, very nice touch!!!
Roofs have such a strong symbolism for us as humans....shelter, home, warmth, and I think the way you've used this one is excellent.
I love the way you've contrasted the roof with the hillside and sky beyond....the hillside/mountain is suggested rather than explicitly shown and this makes the photo much stronger IMHO.