Hi all, wondered if anybody had any advice for a small project i'm going to attempt in the next week or so. The roof of our 1930's semi is not felted under the tiles and so we suffer from a terrible amount of dust in the loft space. Which annoys Mrs P when her bags of clothes that she will never wear again and we just ship from loft to loft each time we move get a bit dusty.
I want to put some sort of lining on the inside of the rafters to minimise the problem but am unsure on a few points.
Condensation is the main worry and I'm assuming that I should use some sort of breathable membrane and leave gaps at the top and bottom. But should I fix this membrane taught or leave it slighly sagging between each rafter to aid circulation?
Also, the loft is pretty draughtly with plenty of daylight visible through the tiles - once i've stapled the sheeting to the rafters, should I batton over the inside of the membrane to make it a bit more durable?
It's ok to prevent moisture from your homes interior from reaching the roof timbers by creating a moisture proof envelope to the underside of the rafters, as long as air is able to circulate around the rafters and tile lathes.
Search for Arleflex 2L2 on google, it's a foil bubble wrap, great insulator and you just staple it to the underside of your rafters.
If you think some of the dust is coming from your existing insulation (assuming there is some!) you could cover it over with some more (200mm is the recommended depth now). Using something like the "Pink Panther" low irritant fibre glass which is encased in a Pink coloured poly wrapper that isn't removed when it is installed would help I imagine.
I though it was an Owens Corning product, but I can't find a link. I bought mine from the local Focus store.
