pipe insulation using silver 'bubble wrap' and standard foam

[piper64]

My boiler is in the outhouse, which is unheated. This cold weather has highlighted the need for some insulation!

The pipes mostly run along together, the cold feed, hot water and the flow+return for the CH.

I was going to foam wrap the cold feed, then foil 'bubble wrap' the other hot pipes, but would it make sense to wrap them all together so the warmth from the hot pipes keeps the cold pipe warm too?

Or, should i keep the cold pipe foam wrapped separately to the hot ones?

Does it matter?

 

[ChrisR]

SUre insulate the hot pipes from the world and I'd thermally "join" the hot tap water and CH pipes pretty well. Not the Cold main though so much, because you don't want the cold getting warm. If it's in the area it won't freeze assuming the CH is on.
You will need frost protection of course, which is separate, if it could all go off.

 

[piper64]

Thanks for that.

Not sure that the cold pipe would get THAT warm, but that's what I'll do I reckon. I'll foam wrap the cold feed, as normal and put this foil 'bubble wrap' on the hot pipes on their own.

Odd that it says on the installation instructions for the foil to put the silver side facing outwards so that it acts like a mirror, reflecting radiant heat AWAY?

1)It's silver both sides
2) You want to reflect the radiant heat INWARDS to the pipes I'd say?