The Roof

The Building
The roof exists on top of the fictional apartment building at  2311 No. Los Robles Avenue where Sheldon, Leonard and Penny reside and has been used as a location for various TBBT episodes.

Significant appearances in episodes
In "The Lunar Excitation", the guys are bouncing a laser off the moon that is set up on the apartment building roof. Penny joins them and brings her date, the dim witted Zack Johnson. Sheldon is forced to go ona date with Amy Farrah Fowler because Raj claims that he held a dirty sock form the roof in his apartment.

In "The Countdown Reflection", Howard and Bernadette have an quick wedding on the roof so that Howard can make his tripinto space and so that the Google satellite will photgraph their wedding. The roof is decorated with a hearst and arrow pattern and is seen in fullas the view pulls bacl from the building to the neigborhood and finally thorugh Californai and up to the whole earth.

In "The Nerdvana Annihilation", the guys are bringing their time machine upstairs blocking Penny's ability to go downstairs. She ends up going up, crossing the gap between The Building and the one next door and ending up having lunch with an Armenian family.