Response from LEGO SHOP
8 August 2016
Haley - Consumer Service Speciliast, Consumer ServicesYour grandma sounds like a fantastic lady for getting you this awesome set as a gift! We're really glad that you like the set. I'm sorry to hear that it's coming apart pretty easily. The pillar bricks aren't the only of the build that hold up the roof. The walls of the building should also be supporting the roof as well. I'd recommend rebuilding the set and ensuring all the pieces are snug to see if this helps. Thanks for your feedback!