But first thing you need to think about is your windows. Maybe you got, old, wooden ones? They are looking very cute, surely, but it isn’t enough. If you will exchange it for any modern, PCV pieces, you will have a chance to keep many of warm air inside of your rooms. You do not need to replace each piece at ones, you could do it in couple steps, to avoid too much expenditures in one month. Different relevant case is your roof. If you will cover it with some fibreglass mesh, it could also keep your house a lot warmer in the time of winter, cause a lot of the air is going away trough it, perhaps.
Then, you may invest some of cash in external wall insulation. It could be really giant cost, but it is worth it, more information here – external wall insulation. Within several years, costs of it would come back to you into the warming expenditures. Also, if you like, you could at the end prepare some interior insulation as well, using also fiberglass mesh – it is the nicest product for all this sort of works. But where you may buy all the materials? It is very easy, go to the closest building store. You will localize there all the stuff you need, from screwdrivers to fibreglass mesh.
If you are afraid of winter, thanks to giant expenditures for healing, there is a great solution. You need to organize an external wall insulation and replace old windows with PCV ones, you may also like – fibreglass mesh. It should help you to spare many of cash, and it is great for environment, because you would waste much less energy. And the best season to start renovation like this is spring. So possibly you may consider it?