How to stop freezing pipes

[Brett Staples]

Hello all, 

So In my rental property I just bought the old owner had the cold pipe put up against the outside wall and it keeps freezing when it snows. It is insulated in the foam case and fiber glass against the wall anything else I can do? 

Second issue. 

The drainage pipe goes through the bulk head (concrete encased staircase with 2 metal doors to the outside). Also freezes and prevents drainage. I tried wrapping in fiber glass insulation and wood boxing it in yesterday so hopefully that fixes that. I'm trying to stay away from plug in pipe wraps as I don't trust that a tenant will maintain them and don't want burster pipes.

Any and all suggestions minus moving pipes would be greatly appreciated. In order to move the pipes I'd have to gut the kitchen and move sink to other side.