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On 01/07/2019 at 09:03, PeterW said:

 

No

 

Just fit it... CT1 (or cheap sealant if it’s coming out in the next 24 months) to the wall and be done with it, but bear in mind you should really have a fall on the duct to an outside vent so any condensation that forms inside runs to the outside not the inside. Bit of fibre insulation around the first part of the duct will help stop it initially. 

 

How about this stuff?

 

FDAD4.jpeg.f55822e23dbba0cca6ebb01fd8dc95fa.jpeg

 

https://www.tlc-direct.co.uk/Products/FDAD4.html

 

Pretty sure I have occasional visitors running along the eaves where this duct goes through so I see a potential chewing issue. If they get into the duct they can get into the void in the wet room corner!

 

Many holes to block still!

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46 minutes ago, Onoff said:

 

How about this stuff?

 

FDAD4.jpeg.f55822e23dbba0cca6ebb01fd8dc95fa.jpeg

 

https://www.tlc-direct.co.uk/Products/FDAD4.html

 

Pretty sure I have occasional visitors running along the eaves where this duct goes through so I see a potential chewing issue. If they get into the duct they can get into the void in the wet room corner!

 

Many holes to block still!

 

Cos it’s crap and not designed for what you want to do ..?? You’ve no chance of attaching that to a spigot on a fan and turning it 90 degrees up. Use convoluted aluminium duct, and buy a roll of 100mm rockwool and use the rest to insulate over the top of the ceiling. 

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