Very poor after sale service. The insulation was installed in November 2018. The earthwool fibre falling through tiny gap between cornice and brick wall in July 2021. I rang the company many times , at last the installer came to check the insulation and said that fibre falling through the gap is not uncommon and refused to fix the problem. Now my house is cold in winter and hot in summer. The Kitchen bench looks dirty because of the falling fibre.