Mains pipe in wall

[JohnD]

BS lagging for outdoor pipes is as thick as your arm. Climaflex is a good brand but for outdoor use I think you need Armaflex.

I would be thinking about a plastic trunking to box it in, I only know the stuff sold for Electrical work, which has a removable cap and is rigid UPVC. You can paint it with non-drip gloss to blend or tone with the colour of your wall.

 

[ServiceNumpty]

Is the chase vertical or horizontal, chase must be at least 45/50mm deep, not much left of the outer skin brick itself.

 

[nearlythereyet]

Cheers. Haven't tried it as yet, but if I have to, could I get away with thinner lagging for the inside of the pipe (where it will need to sit in the chasing) and thicker on the outside (where I'll box it in - and where I guess it needs to be most protected)?

Its a mixture of vertical and horizontal. Would say its prob not much more than 30mm deep...

 

[JohnD]

I'm beginning to think you should reconsider quite how "impossible" it would be to run the pipe inside the house.