Pipe lagging

[sg1009]

I've noticed that the pipes under my house are mostly bare or lagged with felt pipe sleeving. I was going to buy some more and give it all a proper coating before winter.

My local diy store has 5 options:
Economy pipe insulation
Byelaw pipe insulation
Water regulation pipe insulation
Pipe insulation
Felt pipe sleeving

Is it all down to what I can afford or should I not even consider anything other than regulation? Should I use a combination?

It seems rather expensive!

 

[D_Hailsham]

Is it all down to what I can afford or should I not even consider anything other than regulation?

The thicker the better (that's the insulation )

It seems rather expensive!

But not so expensive as all the heat wasted warming up the earth! Or do you have a basement?

 

[sg1009]

It's all under a suspended wooden floor. About 3 foot of free air.

Pipes include:
lead (water in)
copper / plastic water hot + cold
copper / plastic central heating

 

[D_Hailsham]

It's all under a suspended wooden floor. About 3 foot of free air.

Have you had the floorboards up to do another job or just out of curiosity?

That's a large space to be heated unnecessarily.

Pipes include:
lead (water in)
copper / plastic water hot + cold
copper / plastic central heating

Insulate the cold pipes to stop them freezing and the hot ones to prevent heat loss.

 

[sg1009]

I've had to replace some rotten boards and joists (unrelated) but haven't got around to carpeting again as yet and still have an access hole.

Okay so i'll use regulation which I think is 25mm thick:
http://www.pipelagging.com/tl1525dg1m-15mm-bore-25mm-thick-pipe-insulation-p-707.html

That's £1.55 / M, wickes is even more £1.84!

I should stop moaning and just pay out. I probably only need half a dozen meters. I just wanted the right stuff.

 

[D_Hailsham]

I probably only need half a dozen meters.

No! you need half a dozen metres. A meter is the thing which measures the amount of gas/electricity you waste.

 

[sg1009]