Vapor barrier - ret...
 

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[Closed] Vapor barrier - retro fit?

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I'm in the process of re-insulating the loft. Above the bathroom its just plasterboard with insulation between the ceiling joists, no vapor barrier. Do I need to / should I do something to contain the vapor, if so how can I do this (there's no VB elsewhere, but thought that I should at least do this section.

The roof space is ventilated with tile / ridge vents and does get a bit of condensation in the depths of winter, but I've seen worse.


 
Posted : 18/11/2021 8:58 am
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is your bathroom painted or even better tiled.

If so your condensation isnt coming from there.


 
Posted : 18/11/2021 9:24 am
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Bathroom is painted. There is an air gap around the loft hatch which is probably where a lot of the air is escaping in to the loft. I'm going to fit draft excluders and insulate the hatch as well.


 
Posted : 18/11/2021 9:26 am
 piha
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If you do retrofit a vapour barrier you still need ventilation.


 
Posted : 18/11/2021 9:32 am
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Could always use some airtight tape around the loft hatch too, that'll stop any air movement completely.

Edit: Ignore that, you mean a better seal on the hatch itself?


 
Posted : 18/11/2021 9:41 am
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The loft hatch is going to be used occassionally for access, its not square and there's some gaps around it. I'm going to add some beading / draft excluders on the inside to stop airflow through the gaps.


 
Posted : 18/11/2021 9:49 am
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How timely:


 
Posted : 18/11/2021 2:14 pm
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Extractor fan if you haven't got one.


 
Posted : 18/11/2021 5:15 pm

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