Unfelted roof

kenny000666

Hi guys

I have a 1930s house and the roof, i believe is the original roof. Currently it's unfelted, and I see it has light holes.

At a later date, I will do a house extension and have the roof rebuilt, however for now, as we have just purchased the house, we are low on cash for a complete rebuild. The building survey also mentioned the roof is not in critical condition.

I would like some alternatives to save the inside of my attic from water and dust, so we can use it for storage.

I can think of the below solutions.

1) leave the attic for the time being

2) install a tyvek wrb membrane as an under the joist felt, and put breathable insulation between the joists. (I have left over tyvek supro plus from floor insulation)

3) foam insulation (quoted £3000) !?!?!?

Any advice is appreciated. I'm veering towards 2) as the cheapest way to make the attic usable

Regards

Ken

Mankysteve

Its not leaking then leave it alone, is generally my view. Its the cheapest option, its not a bad idea to insulate between the ceiling rafters though

There must be millions of houses in this country without felt.
You wont keep dust out of your loft unless you make it air tight in which case you'll get dry rot instead.

moneyistooshorttomention

It's my understanding that roof felt is a second layer of protection against rain ingress.

That is, that if rain manages to get through (because of a slipped tile) then roof felt stops it going any further iyswim.

Gloomendoom

The only way to do it properly is to remove the tiles, fit the felt/membrane, and re-tile.

Perhaps the worst option would be the foam.

Do you mean joists or rafters?