I am writing this for my uncle. He is more than 80 now.He is now staying with us and we all are planning to reconstruct one of our room for him. But we have the limitation of room space in our home. All rooms are small. And with this limitation, we are planning for windows and door replacement. We wish to place windows that are of 100% lead-free and of natural light availability in that room. I heard from many about this that they adopted lead-free windows in their home. Is this possible to have 100% lead-free windows? And Is it possible to replace the doors without damaging the walls near to it? I am confused to take a decision that whom should I approach for this. Many of my college friends suggested me to search for best door replacement services in Ontario. They are arguing that in Ontario there are many good services providers like north tech windows and doors which are best for such renovation works. But I just need your suggestion too. Do any have experiences from any of such service providers in Ontario?