Lightmaps Have White Color Bleeding Around Edges

Hi! Can anyone please explain why I am getting these white color bleeds around my edges? The lightmaps were baked in 1024 resolution with the presentation preset.
The top and bottom (roof and floor) are separate meshes, and the bottom floor mesh is even intersecting with my wall. All of my materials are set to double sided. I am only using a skylight for my lighting because I dont want any hard shadows.
The lightmap channel seems to be unwrapped correctly (inside UE4) and the resolution seems to be sufficient. Why am I getting these glowing edges, how can I prevent this? Please help.

This issue here was that my walls were 2D and didnt have anything around them to prevent light bleeding in. I fixed it by adding thickness to the walls.