How to: Screws into concrete?

I have a split foyer and doing some renovations to the lower floor. I need to install some louvered doors on a closet, but flooring is carpet over concrete. What do I need to properly anchor screws into a concrete floor?
Thanks in advance.

 

Get yourself some plastic wedge anchors, drill an appropriate sized hole in the masonry with a hammer drill, and insert the anchor. If you use the right size and length screw that is made for the anchor they should work well. If the anchor wants to spin, you probably either drilled too big of a hole, or you are using a screw that is too large for the anchor.

Be very careful when you drill through the carpet. You should probably slit the carpet with a utility knife to make an opening for the drill bit- otherwise certain types of carpet like to wrap up around a drill bit which will make a giant snag in the carpet.

 

Thanks, but is there any way to use a regular drill? I'm just a regular homeowner guy, no hammer drill. Now off to google hammer drill, since I don't know what that is..

 

While you are at it...........look up tapcon screws. Available at home/hardware stores. You MUST use the correct size masonary drill bit, but it often comes with a packet of screws. And drilling in concrete generally needs a hammerdrill, the concrete is not that hard, but the aggregate stone is VERY hard.

The other alternative is concrete nails, but I don't recommend them. Or, powder actuated(gun) nails...........requires another tool.

 

Hammer drills and bits can be rented. Sorry, there is no magic wand for this.

You could always try skipping the one screw that goes into the floor, press the bracket into the carpet, and hope that the jamb screws and weight of the door keep the bracket in place. That would be preferable to trying concrete nails, IMO.

 

you could attach a small piece of 3/4" plywood (3" x 1") to the concrete to hold the bracket using construction adhesive (liquid nails).

Just cut out carpet so it outlines the bracket . If there is a tack strip in the new hole in the carpet, just flatten out the nails with a hammer and subtract the width of the tack strip from the length of the plywood. After the bracket is installed the carpet should then cover the plywood.

Put a good amount of weight on the plywood as the adhesive drys.

Then you can screw into wood. Just make sure the screws are no longer than the bracket and plywood thickness combined.