I've had a builder in twice in the last two weeks.....and he's coming again tomorrow...why? to stop those evil creatures (i hate them) getting in to my extension, where the kitchen and bathroom is.
I live in a terrace house......but the problem started with next door....a single mum on her own with kids....not looking after her property....she had holes in her eves on her single storey extension....which is built against my single storey extension....pitch roof above them....so they found a way in her side and found they could get into my loft from her loft.....
So the builder (paid by me, coz i thought i was onto a no go asking for money from nextdoor) blocked up all the holes in her eves and also blocked up any holes in my loft leading to her loft.
Problem solved you may think!! Apparently not!
One rat or possibly more ....must have been my side when the builder blocked up my side of the loft....coz since then i've heard scratching in my loft and an inspection of his work by me yesterday in the loft.....cement has been chewed

and a hole has appeared by the backdoor on an internal brick wall

(its got down the cavity to do this)
And this must be one clever rat.....coz the rat poison i'd left in the loft hasnt been touched.....
Its also blooming destructive......chewing thro' brick walls to get out

So the builder is going to block up the hole its made in the brick wall tomorrow....in the meantime the internal door to the kitchen (from the backdoor/bathroom) i close at night or when im out.....and a rat trap laced with part of a mars bar sits by the back door....
Its seems to me rats.....once used to be able get somewhere.....will chew thro anything to get there if they want to

I dont care how much this costs me.......i will get rid off them......tho it doesnt help i suggested to next door several times she stops putting food out for the birds.....but she still does.......bird food after dark is rat food!!!