Our house is a 1930s semi. A few decades after it was built, a timber porch was added (with clay tile roof). Although that timber porch had a lockable front door, the more secure original front door of the house remained, so one had to open the porch door and then the front door to get in. As part of our renovation/extension project we are knocking down the old timber porch, building a cavity wall porch, and doing away with having two lockable doors. Instead we will just have one door withi