"Pete C" wrote in message
...

One way to stop wind blowing through the loft is stapled or batten a
vapour permeable membrane like Tyvek Housewrap under the rafters.

I have always wondered about this approach.

1. Would be be better to remove any felt with a Stanley knife, install
Tyvek under the rafters in the loft and seal off the eves vents.

or

2. Leave the felt, install Tyvek under the rafers and right down sealing
the eves vents.

Of course in both cases install a vapour barrier on the loft floor.

This way a gale will not blow through the loft and it will still be
breathable.