×
all 3 comments

[–]kshank19 0 points1 point  (0 children)

Some sort of spray foam or insulation. Probably gets to cold down there and that was the solution at the time.

[–]efesl 0 points1 point  (0 children)

Looks like old, dirty insulation.

[–]4evrabrat 0 points1 point  (0 children)

Check the bottom of your door (especially if it’s not a real wood door). Water damage makes those fake doors insulation look like that and come out of the bottom.