In article .com,
says...
Hi,

Last night I saw Rogue Traders about dodgy roofers. Which reminded me
that I had to start looking for someone to fix some torn felt in the
roof space and lay down thicker insulation.

Would anyone have an idea of how much approximately it would cost for
such a job to be done? My house is semi-detached with concrete slate
tiles, and as mentioned felt which is torn in several places.

Is anything coming in through the holes in the felt? If not, why worry
about it? As for insulation it's a job pretty much anyone can do with a
bit of care - why pay someone else to do it?