Sealing a Metal Building

[LDO]

Looking for advice on how to seal up my 30x50 metal building. Trying to keep bugs and critters out of it.

Here is a picture of the areas I would like to seal. You can see daylight there even though there is a corner flashing/trim piece on the outside.

 

[readhead]

You need outside closure. You can buy it at HD or Lowe's. You will have to remove the corner trim, install the closure and install the trim. Try to find closure with a sticky side. It will stay in place better. If you have a metal roofing supply near you it will probably be less expensive.