I believe my question is "how do I drill a steel plate so I can screw something to it"
As per a few of my other posts, I'm trying to reduce the gap between my garage door and floor.
The garage door and floor are (now) level with each other, and so I had hoped to include a draft excluder to help keep out most of the water and cold air.
I bought this draught seal.
The problem is, I can't screw these screws into the metal garage door (nor did I expect to be able to). I then looked up how, and it shows use metal drill bits, around 2mm, to create guide or pilot holes.
I've done this, and am unable to pierce the metal. I have a MAKITA DHP485STE 18V 5.0AH CORDLESS COMBI DRILL which I believe is more than powerful enough
I'm beginning to think their term for garage door means wooden, where as I have metal.
Is there any special trick to drilling through metal because, I was able to drill through the metal sheet that holds the plastic draft excluder without issue (the one in the link above). It's just the garage door seems to be made of super strong metal!
EDIT
As per comments, I've added a picture and have a dreadful feeling I can see the issue… That I'm not just going through that front plate (which is about 3mm thick)… I hope you can see the 2 places where I've tried to drill myself. I can get 0.5 – 1mm deep and then the drill bit seems to do nothing else
Best Answer
You need to use self-tapping sheet metal screws. You should be able to find these at any home center or hardware store. The metal garage door is a thin sheet of metal, usually aluminum or steel with a foam core and another thin sheet on the other side. If it's uninsulated, then there is usually only the outside sheet but there should be a "U" at the bottom that gives you a flange to attach to.