A lot of companies have a limit of 15kts for SFH particularly in the R22. This is a sensible limit for low timers.
There are of course other limits, ie wind speeds/gusts for start up and shut down. I don't know about now but i do recall R22 handbook limiting speeds to 25 knots or gust spreads of over 10kts. Maybe mistaken?
Once airborne, with no gusts, the helicopter doesn't know how windy it is. It's all just relative airspeed isn't it?
Obviously every type will have a different limit, depending on rotorhead config etc.
Find your own comfort zone and fly with someone who is experienced if you don't have the experience. I found that american trained pilots (florida etc) came back to the UK and got a shock with the difference with weather. Some had never experienced more than 10kt winds.
Nothing like landing an R22 in 40kt winds, behind a hangar, if you get caught out on a nav ex. TT 25hours!!!
