Mice vs cottage

Those spawn of Satan otherwise known as mice are cohabiting where I am doing a bit of renovation, and I am looking for strategies.
A plumber, who cheerfully told me the plastic piping I had just put in was a target (especially the joints), said first thing was find where might be coming in.
There are gaps in floor / wall and I was thinking of expanding foam?
The electronic deterrents seem to come in standard, high and low and varying frequency, any recommendations?
And is it mostly during the cold months they look for a bit of shelter?

 

In the short term, steel wool jammed into the gaps around the pipes will help stop the rodents.

 

Sorry, they'll be with you all year round and will find somewhere cosy to produce their offspring. I had problems with them in a previous house, they were entering through the air bricks near the damp course. I covered all the air bricks with a fine metal mesh which seemed to solve the problem.

 

Thanks. It's stone built on a thick concrete base. I think entry maybe through the odd mortar gap. I can occasionally hear them in the attic but the place they are consistently evident overnight is the kitchen. There is no food left in there so I'm guessing warmth or water in the sink area is what is attracting them.

 

I don't think you will have any choice but to poison them Chris. They multiply very quickly. I would get the mortar gaps filled first though.

 

I used steel wool then sealed the gaps and cracks with resin, you can get the resin in cartridges, below is what I used.

Paslode C-Mix Plus Internal Use Resin - Thomas Graham (thomas-graham.co.uk)

 

Poison, or traps baited with peanut butter. Electronic or bunny hugger remedies do not work

 

Don't forget to get rid of those you have inside your home after you have blocked all the holes up.they breed every 23 days .