My house, and the others on the estate, built in the last 4 years, doesn't have any vents beneath the floor on the outside. I see a lot of houses elsewhere of a similar age with vents on the outside at ground level. I just wondered why some houses had them and others didn't? I assume it varies depending on the floor base used?
Curiously, I also notice that two thirds of the estate use blue engineering bricks for their DPC, whereas the other third (including my house) uses the black plastic sheet instead for the DPC. Other than running out of engineering bricks part way through building the estate, I wondered why this might be. The houses that use the engineering bricks are closer to the SUDS balancing lagoons so I wonder if it's something to do with flooding, but I doubt it.
I know these questions are a little random, but the original builder has moved on and isn't around to answer these questions
Curiously, I also notice that two thirds of the estate use blue engineering bricks for their DPC, whereas the other third (including my house) uses the black plastic sheet instead for the DPC. Other than running out of engineering bricks part way through building the estate, I wondered why this might be. The houses that use the engineering bricks are closer to the SUDS balancing lagoons so I wonder if it's something to do with flooding, but I doubt it.
I know these questions are a little random, but the original builder has moved on and isn't around to answer these questions