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If your house is historical, you can’t change it from the outside, only inside. Fortunately we may use dedicated blocks, which must to be glued to the layer of each wall. After renovation like that, you’ll observe even 70% smaller costs on heating. Another relevant concept of insulation is replacing old windows with modern ones. Plenty of hot air is going away trough the glass, that is why you better do something about that. It isn’t really big expenditure, and it refresh the interior. When your house is not vintage, but very easy in design, you can do external wall insulation. You are able to buy dedicated sort of panels, which will change the design of house and protect it from outside. No matter which option you wish to choose, each of them require additional help. Fortunately nowadays plenty of specialists are offering their talents. You can find them online, just use the browser. And remember, skills are more important then price.