Mesh banner on windows

[Signs2u]

Making and installing a 24' wide by 54' tall mesh banner. Was planning on drilling holes and installing that way but customer just told us we cannot drill into building. LOTS of windows to use --- anyone ever trusted suction cups to hang something so big?

Was thinking about a lot of these: http://www.uline.com/Product/Detail...EyVP7IKoMeydfYDvYQuqxRoCk9jw_wcB&gclsrc=aw.ds

Anyone have ANY experience?!

Thanks!
-Mike

 

[BIG EASY DOES IT]

That's a big sail. I would not trust suction cups. I would tell customer only safe way to install is to drill into the building.

 

[Signs2u]

Outdoor, going to be up for a month.

Sidewalk directly below it, as well.