75mm Duct Insualtion?

[Marko]

I've gone through the BPCV instructions, and I can't find anything that specifically says whether the 75mm ducting needs insulation in a cold loft. I'm assuming it doesn't as long as you can place the ducts under the loft insulation. Can anyone confirm this? TIA 

[Mike]

Under the loft insulation is good.

[Marko]

  On 10/10/2024 at 14:17, Mike said:

Under the loft insulation is good.

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Thanks Mike 👍

[gregcope]

Mine is all under 470-500mm of loft insulation.   Logic being it should be near to room/house internal envelope temperature.

[arbennett]

Ours is under the insulation but we do notice on very cold days some loss of temperature. It’s a degree or two.