The Natural Philosopher wrote in news:i6rbum$bqe$2
@news.albasani.net:

Better is to cover the insulation with something windproof.

Boarding, or simply plastic sheet maybe.

Fixing holes in eaves that were always built that way is a thankless
task IMHO.

Thanks for the suggestions. I was wondering how wind-proof rockwool is...
One thing I was thinking of covering the existing rockwool with the so-
called "space-blanket" rolls seen at B&Q - a layer of rockrool covered on
each sode by reflective plastic material.

Al