Mounting shades into exrerior Lanai header beams, New home Fenney
It seems the header support beams in the lanai of newer concrete homes is concrete surrounded by some sort of mesh metal. I've had terrible success drilling through the mesh metal. Once I break through the metal the concrete is no problem. I've been given all kinds of advice ranging from hammer drilling, going fast, going really slow and of course all the different metal choices (cobalt, titanium etc). I'm sure somebody who does this for a living doesn't use 6 bits to get through this mesh. Can anybody give any solid advice? Need a 1/4' hole.
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Try using a smaller bit and then increase to a larger one.
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Hammer Drill & Masonry bit worked for me also.
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Yes, all these ideas work to a degree but it still takes 1/2 hour to drill a 1/4" hole including a lot of backbreaking force. I was told by an installer today that the carbide drill bits dull quickly if you go to fast and/or once you hit the masonry. That might explain why I have varied success. He suggested using self-tapping screws to drill through the metal and then follow up with masonry bit to complete the hole. Throw away the self-tapping screws and use a new one on each hole. I'm going to give this a try. Also, I failed to mention I am drilling very close to the beam edge so the metal mech may be of higher density.
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Maybe I'm missing something but if you are trying to get through some kind of metal before you hit the concrete then you can't use a masonry bit first. I had this same issue but my beam was square metal box incased and filled with concrete so I used a regular carbide tip bit at low speed to get me through the metal then the masonry bit to finish the hole. I used tap-cons to mount my shades and complete the job.
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Hammer Drill
If you are using a hammer drill that makes a lot of noise and goes nowhere, rent a real percussion hammer drill. The bit will go through the metal and concrete with ease.
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Yep it was tough and required a lot of pressure in an awkward position on a ladder. I made eight holes and it took quite a while. I must say I never went through that many bits.
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