@ElenaGilbert said in What is the most important in renovation?:

Hello there! I think that windows replacement is the most effective and good start for the beginning. But to choose best windows manufacturer is quite difficult, I am paying attention to price and speed of their work. I just started a renovation and checked sliding window price, which is quite affordable for such a window option. It is a perfect composition, has a light design and really convenient in use.

I agree, the prices are affordable and good quality.