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Another thing is to proceed external wall insulation. It will be even larger costs than window, but you don’t have to make it in the same time. There are a lot of hi-tech materials, that will keep your house warm, like external render facades for example. Also, you may arrange some nice team of experts to do it, because it isn’t a piece of cake. The last, and the less expensive is to insulate interior walls, you will be able to do it on your own.
matter which sort of procedure we like to do, sometimes at few materials we may safe many of money. So if you are hiring group of contractors, do not let them to buy supply for it, cause they won’t be thrifty, you better do it on your own. Look in the internet information about fine markets with building materials, maybe some lighter objects you could even order online. When you are planning very big shopping, maybe you consider to visit wholesaler’s?
When you are an owner of big, old building, sometimes you have to spend a lot of cash to improve it. You are tired of each winter’s payment for gas healing? You may reduce it with several procedures: new PCV windows and interior & external wall insulation. Maybe you will spend a lot of cash for it, but after couple years it will get back to you.