Would anybody have any contact details for a blown in loft insulation company, that might cover S.W. Herts. I'm struggling to find anybody.

I'm having a cold roof, due to height restrictions. I will obviously protect the 50mm eaves ventilation path. The problem is that thw total height of the loft space will only be about 1200mm. Hipped on all sides, with a large crown roof. I intend having MVHR, and although the unit will not be housed in the loft, the semi rigid duct work will be snaking around the loft to the individual rooms. I will be having a loft hatch, and thinking that having a 400mm layer of blown in insulation, via the loft hatch when all the pipes are completed. It will be a trussed roof so access to get up and lay fluffy stuff afterwards, just ain't gonna happen. Thanks in advance.

Could you leave the ceiling till later and fit fluffy from underneath?

@Mr Punter That might not be a bad call. Still a total pain in the arse to do. But might actually be doable. Good call.