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-   -   How to secure door threshold to concrete slab? (

darsunt 02-24-2012 11:19 PM

How to secure door threshold to concrete slab?
I sometimes use those blue plastic coated bolts that you drive into holes drilled into the concrete. But they are too large, and I don't want those bolt heads sticking out of the threshold.
I heard there are nails that can be drive into concrete, are they available at hardware stores? Also if I drill a hole, can a regular screw be driven in there and hold?

joecaption 02-24-2012 11:31 PM

Reguler screw will not hold.
More info is needed. Tap Con screws are avalible in at least 4 differant sizes and will work fine with any threshold I've ever worked on.
Tap Cons are screws not bolts. Are you using flat head Tap Cons?

PaliBob 02-25-2012 02:07 AM

Ditto on using flat head Tapcon screws.
The screw head can be counter bored ¼” and covered with a plug.

For installing a ¾” thick threshold a common Tapcon length is 1-3/4” or 2-1/4”.

Caution on using an extra long screw. They will break, I’ve done it.
Tapcon says the screw embedment s/b a minimum of 1”, maximum of 1-3/4”

oh'mike 02-25-2012 06:24 AM

Is this an exterior threshold?

If interior---use PL premium---drilling holes into the concrete and pounding in wood dowels will allow you to use regular wood screws---but I would not use that for an exterior install--water will eventually soften the wood plugs.

darsunt 02-25-2012 11:23 AM

I thought those blue bolts were Tap con. I better double check. I always tightened them down with a small crescent wrench.

chrisBC 02-25-2012 11:44 AM

Yes sounds like they are, however there are different kinds, have a look to find ones that will set flush with the threshold.

darsunt 02-25-2012 10:24 PM

I got some tap cons in screw configuration. Thanks guys.

Tom Struble 02-25-2012 10:29 PM

what kind of threshold is it? wood/metal?

darsunt 02-25-2012 10:30 PM


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