Advice on how best to insulate around water inlet

[deb10]

When we brought the house the garage had already been converted into a room. It's always been a cold room as I don't think they did the best when constructing and insulating it. As you can see it's literally the outside wall, a cavity and then plasterboard backed with foam insulation.
As it was a garage, the water inlet to the house and electrical boards are in the walls, with cut out access panels. When we get really cold spells, like this week, sometimes the water inlet freezes. A quick blast with a hairdryer sorts it out but we are looking for a better permanent solution. The pipes are insulated as much as they can be, but is there anything else we can do. Anything we can wrap or cover this area to prevent freezing? Thanks

 

[ChrisJP]

The quickest action would be to leave open the access "door" that you have opened to take the picture, when outside temperatures get low. That'll keep it at "garage room" temperature, but also make the garage room a bit colder I guess.
I don't think insulation on its own over the water entry point will help, because this point is still in the cold area between garage wall and the inside insulated wall, and will have no source of heat so that, even if insulated, will still get down to the outside temprature.
The only other thing I can think of is to get some electrical trace heating tape and apply it to the water entry point and switch this on during cold weather.