HI Gents, Some advise please, I live in a 160yr old cottage with only a 900mm high loftspace, ceilings have been moved up into the apex of the loft long time ago. We live in a flight path where the noise is getting worse, loft has old insulation, it's not boarded out either. Basically plaster board ceiling, fiber glass insulation then 900mm and less to roof tiles. I want to replace the insulation with soundproof insulation and wondered what people recommend? Rockwool WRA45 comes up on the searches is this the best option? I intend to board over it after to use as storage. Cheers for your help.