Should all central heating pipes be lagged ideally?

[MisterBoy]

During some renovations I've exposed some CH pipes that were boxed in. They're modern plastic ones and due to the nature of it being an old house, they seem to loop all over the shop.

Is lagging these pipes before re-boxing going to make a significant difference? I guess the heat that's escaping the pipes is just going into my house one way or the other. I could just put a vent in the new boxing to benefit from the heat instead of lagging?

 

[Tigercubrider]

Lagging makes the pipe larger, so the boxing ends up bigger.

You could lag pipes in an area that you want to keep heat from? Maybe a hall floor or landings. Obviously anything in an attic or waste area.
As you say, pipes are going everywhere, and plastic tends to go into inaccessible ares so I’d only lag where you are accessing anyway. I wouldn’t go lifting boards in rooms that you want warm anyway. Heat is heat.

 

[JohnD]

Lagging pipes means the heat goes where you want it, and not where you don't.

Pipes relating to hot water storage and taps are not intended for heating the house so any heat loss is wasted

Pipes under the ground floor, in the loft and other unheated areas benefit from thick lagging to protect from freezing.

 

[MisterBoy]

These are radiator pipes in the kitchen & family bathroom so it sounds like it doesn't gain me much then.

Thanks

 

[blup]

Lagging pipes has got to help especially under cold suspended ground floors

 

[Harry Bloomfield]

During some renovations I've exposed some CH pipes that were boxed in. They're modern plastic ones and due to the nature of it being an old house, they seem to loop all over the shop.

Lag only where the pipe heat loss might serve no purpose in warming a space, or where less warmth is needed.

 

[Madrab]

If CH pipes run through an are where it won't warm the living space, then any type lagging will always be of benefit to efficiency, reduce wasted heat and speed up warm up times at the rads. Any pipes that are boxed in will just heat ups the internals of that boxing and nothing else, that's just a waste of energy and for all it costs for a few lengths of insulation.