CET said "If 3refs knew what he was talking about...." According to Snopes, 3refs is citing a libel of the Parliament of Canada that was originally uttered as a slur of the U.S. Congress, so, plainly he doesn't.

I often work in West Block. It's a glorious old building that was weakened by repair work in the 1960s and '70s. The use of the wrong sort of mortar has proven just short of disasterous.