Some materials used to be better. The workmanship has varied over the decades. But one thing is for sure: We have learned about construction materials and they do become less risky and safer over time. We have noticed that 1990 is a really useful year in Calgary real estate. Homes built since that time, tend to, for example have full ensuite bathrooms. They function for modern life. Further, we don't have to be concerned with construction materials like asbestos, for example.