Npower in conjunction with Build Center are selling Rockwool DIY loft insulation for £3 a roll which includes delivery to your door and a free safety kit (dust mask, gloves and goggles).
Roll calculator, terms and conditions and online purchase.
Recomended depth 270mm.
100mm and 170mm rolls available.
Maximum 100M2 of each.(Average 3 bed semi~45M2).
Existing homes only, no new Builds or extensions