As determined pest controllers we carryout a survey of both your property and any adjoining ones to determine if there is a simple solution. If we don't find anything we are able to run a CCTV camera through the sewer system to detect a hidden fault underground, for us, its about how rats get into your home and not using rodenticide to merely mask the issue. 

This was a job where our customer called us out as she had rats in her kitchen; the loft was checked and droppings were found. We checked the drains and marked her's and her neuigbours with different coloured tracking dust - no defects were found anywhere around the house.