Gas pipe under loft insulation.

[Last Plumber]

My understanding is that if it is covered in loft insulation, it is similar to it being installed in an un-ventilated void.

That would be the same for upside down guttering, especially if it was also covered in loft insulation.

It is to prevent any leak from building up in volume and or migrating.

 

[Pat_R_]

My understanding is that if it is covered in loft insulation, it is similar to it being installed in an un-ventilated void.

That would be the same for upside down guttering, especially if it was also covered in loft insulation.

It is to prevent any leak from building up in volume and or migrating.

Thank you. That is very helpful.