Yes, thank you for the question.
Mr. Chair, the design of the roof was provided by world-class Canadian architects. They have looked at other examples of glass roofs elsewhere in the world, in fact, in a number of countries, and they've actually also used a louvre system in order to control light. This is not something new.
The glass roof was also challenged by the design review committee. As I mentioned earlier, we had a design review committee that brought in Canadian architects from all walks of life, the private sector, universities and so on, who came in and challenged these designs. The design that was put forward was not only accepted by the design review committee, but it was also accepted by the National Capital Commission, our House of Commons, and the Public Works people. Various stakeholders were involved in the decision-making process and the design that was put forward was accepted by all.
The glass roof will actually have some benefits as well. It will recapture heat. Up to 10% of the building's energy needs will be captured. During winter months when you have the sun shining in through that glass roof, we will be drawing that warm air from that area at the top of the roof and recirculating it through the building. This is a sustainability measure. There are a number of advantages. The glass roof is also allowing what is a courtyard at this time to continue to be a courtyard in the design of the West Block. This was one of the visions that all of the stakeholders had for this project as well.