Best way to seal windows

[boilerdoktor]

hi all, had new windows fitted few years ago. After a couple of years the inside seal went a bit awol and on very windy days I could feel wind getting in the house. We do live very close to the sea, Cornwall so strong winds are a problem.
I used decorator caulk last year but this year looks like it needs doing again. Cold air getting back in !

Is my mistake using caulk ? Should I have used silicone ? Or is there something better to use out there.

 

[Doggit]

If the winds getting in, it means the seal outside has gone as well, so you need to do boths sides - and the outside to stop any water getting in. And yes, you need silicone, not decoraters caulk.

 

[Gazman16]

have you got trims around the windows? They may not have used expanding foam around the window behind the trim.
Maybe take a bead off and see if nothing is in there.

Other than that caulk is fine.