Punched Tin Frame Using Recycled Tin Cans -- this shows how to cut and flatten the cans, so can be used for shingles on doll house. Description from pinterest.com. I searched for this on bing.com/images
Years before, Van Os Keuls had seen a truck run over a discarded soda can and suspected it would make a wonderful aluminum shingle. Description from eco-artware-notes.com. I searched for this on bing.com/images
Instead of drilling holes. Use the center hole with those roofing nails that have a rounded plastic washer on them and the have ridges on the nail to help prevent "Creep" where the nail tends to come back out do to weather changes. I would also an appropriate sealant on each washer. Now you have NO holes. In windy conditions water defies gravity and will blow "up" and under...
How to Construct Houses with Plastic Bottles
In Celebration of Earth Day: Amazing Recycled Architecture