What I like is the variation of reds on the house and roof. Also the roofs texture is great. It's also well exposed and crisp.
To me the association to the challenge topic is a littlebit difficult, even with the title. Maybe you should have focused more to the roof edge in the title as well as in the image.
I really like how you have included your 'edge' in the photo. it creates nice angles and framing as well. I'm trying this with different croppings, and I think I like this with the ugly roof (the rusty dirty green roof on the house in the upper left) cropped off. The shadows make this interesting. I like how it adds depth. You look down and can't see the ground, makes the 'on the edge' seem more *gasp*. lol. Focus and clarity are good. I like this image.
Hvar á Íslandi? Reykjavík er mjög líklegt en hmmm gæti svo sem verið annar staður. Get nú ekki sagt að það sé mikið varið í þessa mynd en þú reyndir þó :)