2 guys came by in November to check on the house repairs I needed done. They were supposed to get back in touch with me, but I haven't heard from them since. I never heard back from the guy I had used before, who had come by a month earlier, either. So the gutter still hasn't been fixed.
But they did give me another idea of how to deal with rain getting in under the garage door. I had considered putting in a "garage door threshold seal", but that would make it harder to sweep dirt out of the garage. They noted that the water was probably puddling against the door and then seeping under it. Even though the garage is on a rise, the concrete right at the bottom of the door isn't sloped enough. In the past, Qiao had wanted to grind the concrete down some, but at the time we didn't really have the right tools for it. These guys suggested cutting some grooves in the concrete to allow the water to drain away.
So I did some reading. An angle grinder can be used for cutting grooves in concrete, as well as for grinding concrete. But the tool sounds rather dangerous. I decided to first try using an old screwdriver, chisel, and mallet to cut out some grooves. I was surprised at how soft the cement part of the concrete is - moist from recent rains, it could be scratched away with the screwdriver, without even needing the mallet. But the granite chips in the concrete are much harder and difficult to gouge away. They do make lovely sparks though! Yee-ha!
I decided to go ahead and buy an angle grinder
to speed up the process. I bought a flat turbo diamond blade for cutting grooves, and also a diamond turbo cup wheel for grinding some of the concrete down to increase the slope.
I'd never used an angle grinder before, and the instructions that came with this one were somewhat lacking. I did some more reading to make sure that I was attaching the blade correctly. More horror stories about angle grinder accidents
momentarily made me wish I hadn't bought it. But at least the kind of blades I got are supposed to be the less dangerous ones.
Today I got up my courage, along with my safety goggles, dust mask, denim clothes and work gloves, and tested the angle grinder with the flat blade. It really does cut through the concrete easily, including the granite.
I was going to test the cup wheel today too, but that one says to use a full face mask over the safety goggles. I don't have a full face mask, and I'm not going to ignore the safety warnings. So back to the store I'll go. In retrospect, my brother's motorcycle helmets which I just gave away, might have come in handy.