Dweller on the Threshold

The 42" front exterior door had a very worn down wood threshold originally. Ed later replaced that with another oak threshold. Since the floor was being replaced, and the threshold out of whack due to the uneven surfaces and tilted door, Ed's threshold was also tossed. I decided to look for a more commercial (READ: durable, can take a beating) solution. Even though they are not building vintage or aesthetic, a shallow aluminum threshold was the answer. I ended up purchasing the threshold from AB Supply online. They have a pretty amazing selection of hard to find hardware. The big box stores only sold up to 36" aluminum thresholds, and not a big selection of widths.

Since the limestone sill was slightly higher than the floor, I added an additional strip of walnut to make up the difference. On a great suggestion from Eric, I routed the walnut about 1/16th of an inch to create a groove for the threshold leg to sit. This prevents the piece from sliding in and out, giving it some horizontal stability.

You can't see it in this photo, but I used 'Liquid Nails' to adhere the wood threshold to the aluminum threshold.

Here's the before picture of the door threshold.

You can see the original holes where they inserted some 1/2" dowel pieces to hold the threshold nails. This was the 1896 method before they had masonry fasteners such as Tapcons.

After marking the 4 new holes, I used the MAKITA hammer drill with a masonry bit to predrill the holes for the Tapcon screws.

Here's the installed threshold. I used some 'roll caulk' on the underside of the front part to keep any water out coming from the exterior side. I didn't use any glue (yet), in case I want to be able to simply unscrew and pull up for some reason.

We'll see how it holds up the rest of the winter. Big storm coming Tuesday.

I'll have another post about the 'automatic door sweep' i'm putting on the front of this door soon.


  1. Hey Jerry I am getting ready to Duplex down also. I wanted to ask you a few questions. Could you email me at. andyholcomb@hotmail.com or andy.j.holcomb@gmail.com. i wanted to email you through your blog but i cant find an email link. your place is looking really good

    1. hi Andy,
      i'm still not done with my project, but there's light at the end of the tunnel. how's your project going?

  2. you have a great door threshold tips here,thanks


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