Hello, Thanks in advance for any replies.

I have just had a new boiler fitted in the loft and the person who
installed it did not insulate the plastic water pipes but did the
copper ones. Is this an issue or dont you need to insulate plastic
pipes ?. The pipe in question is going to the overflow unit to top up
the rads and looks to be coming from the mains feed which feels up the
water tank.

Thanks in advance
Steve