I don't like it, for a number of reasons- it's generally proposed as a solution to slate slippage due to nail fatigue/ corrosion of fixings on older roofs. Looks great in principle but if you get a leak (via a cracked valley, cracked or loose slate etc) water will find its way into the roof space and will be concealed behind the spray on insulation where it may go undetected for years, until timbers rot and extensive damage has occured. Secondly this material does not allow your roof timbers and the roof space in general to breathe and unless you take appropriate alternative steps to ventilate the space you may have problems with condensation and mould in the roof. Any product worth using should be a BBA or Irish Agrement Cert. approved.
Yeah our roof wll be an open type apex if I am describing this right, When we look up to the ceiling will will see the apex of the roof shape, does that make sense??
Hard to know what to do really, will check out the companys and see what they say.
Thanks all