I had a huge problem with a smell coming from inside the wall and I was recommended by a neighbor to call Bio-Tech. I called them and they sent Raymond out to find the source of the smell. Well, who would have thought it was BATS! They had a nice little nest behind the bricks. I had them do an exclusion of the whole house to keep all pests out and had to call a bricklayer to remove the top layer of brick. Raymond found the nest, he proceeded to clean it out, disinfected it and went well above my expectations to get rid of my problem. I would recommend Bio-Tech for your pest needs if you want a very thorough job done! Maria B.