Membrane for rafters in loft

[daved2424]

I have a cold loft with 300mm of insulation with boards above. The space will only be used for storage. There is no felt under the tiles (1930s house) and as such a lot of dust blows in.

Can anyone recommend a light-weight breathable membrane that I can tack to the underside of the rafters just to keep some of the dust falling onto stuff stored up there but still allowing air to properly circulate?

Many thanks

 

[Doggit]

Try these guys. At the end of the day, as long as it a breathable membrane, then you should be fine. If you're really worried, leaga a gap at the top, and the bottom, but I can't see much moisture getting through 300mm of insulation and boarding. I take it you haven't pushed the insulation down into the eaves and blocked any vent by the soffits.

 

[daved2424]

Perfect. That was exactly the product I was looking at.

Correct, the insulation is clear of the eaves. Ventilation is pretty good.

Thank you.