By Steve Duke: Sales Director – Refurbishment & Contracting (Knauf Insulation Northern Europe)
There is an ongoing debate about which is the best solution for the thermal upgrade of existing solid masonry walls. Which is the optimum solution, external wall insulation (EWI) or internal wall insulation (IWI)? The answer could be both, neither, or the installation of both systems as a hybrid solution. The truth is that insulating solid walls can be complicated and the relative merits of the available options should be considered on a project by project basis.