Hi Robm, welcome to the forum. A subject very close to my own heart, and after some research I have decided the best way to secure boards all year round is the safelinks units as described by Frederik and also seen on other threads. You don't mention what area you are working in but working in the West coast of Scotland with amongst the highest wind codes in the country we were always happy securing our boards from October to March or there about. This year has seen the strongest winds that I can remember with January gales regularly blowing at different times right up to June. Here we are mid-summer and we are still fitting the units on all our jobs. The old original guidance I think stated that a 13" board should have sufficient self weight to withstand wind up-lift or words to that affect, but as Rigger has stated it's all down to individual risk assessment which in short is just another way of making it a simpler for Mr hse to bring a successful prosecution against you should things go awry. Another benefit from using these units that we discovered by accident is that daft roofers seem to be a bit more reluctant to lift the inside boards to use on their roof brackets. The only guidance I can remember off the top of my head regarding fixing boards is short boards for ladder access and the like must be fixed down all the time.
