I am looking for advice from this forum please. We have just moved into a new house, which has integral garage that faces North. Over the last few days I have noticed that any rain blowing onto the garage door falls onto a short length of concrete under the door and flows into the garage. The Site Foreman has looked at this and tried to fob me off with a couple of excuses; they will fit a metal/rubber strip behind the door to stop water flowing inside garage, and that NHBC rules do not consider the garage to be an inhabitable part of the house. Further more, any rain is allowed to fall through garage wall will drain into the cavity wall. This last point scares me!
There is a drainage gulley at the end of the drive next to pavement, but nothing next to garage door. The driveway is flat with no slope, so any surface water will find its own level (through the garage door?). We only have the coarse tarmac at the moment, and any rain drains into this. I am proposing that a gulley be installed infront of garage, and that the front concrete section of garage floor is lowered to make water flow into the new gulley.
Are there any Building Regs that can support my request, or better, refute the Foreman's view that water is allowed to drain into cavity walls.
Thank you for taking time to read this.