This paragraph suggests one way to achieve 100% Total Destruction on Angry Birds Surf and Turf level 15. If you have an alternate strategy please feel free to leave a detailed comment below. We would like to thank Laurence for the video.
The general idea is to use a bird or two to take out the triangular leg of the top tower, causing it to fall leftward and hopefully leaving no debris on the top or right. Use Yellow birds to attack the main structure, and launch the Sardine Can to land either on the structure itself or on the ground.