As good as new!
Your old windows may still look good from the outside. However, they often lead a lot to be desired when it comes to insulation, meaning that you are literally throwing money out of the window. Rising energy costs are doing their utmost to make sure your heating bills go up and up, year in, year out. Replacing your old windows will be a decision you won't regret as the investment only takes a few years to pay off.
Are your old windows secure enough? Will they withstand any attempted break-ins? The majority of break-ins have been proven to start at a window. What more reason do you need to start thinking about break-in-proof windows – before this problem affects you, too. The best safety components available for windows are the safetec inside and bonding inside systems by aluplast.
Passive house: Relatively speaking, not many old buildings are renovated to passive house standard at the moment, though the German government are hoping that this will become standard over the medium to long-term. In the window industry, aluplast is the only system provider to offer a narrow construction depth of just 70 mm, which is certified according to the ift (German Institute for Window Technology) passive house standard.