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Finishing Threshold On Concrete

 
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Old 12-04-2017, 08:24 PM   #1
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Finishing Threshold On Concrete


How do you guys finish the gap on thresholds when the concrete stoop slopes down. I've done caulk, but lately getting some bigger gaps(1/2" - 3/4") and caulk doesn't look good.

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Old 12-04-2017, 09:04 PM   #2
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Re: Finishing Threshold On Concrete


I’ve been using azek to fill spaces under doors


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Old 12-04-2017, 09:10 PM   #3
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Re: Finishing Threshold On Concrete


I would think filling the back with foam and the front with mortar might be the best option
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Old 12-04-2017, 09:46 PM   #4
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Re: Finishing Threshold On Concrete


Do you taper the Azek like a big shim, or just fill the front?? Last few doors have had a large taper on the concrete causing bigger gaps.
Worried that mortar would just crack with footsteps over the years.
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Old 12-04-2017, 09:52 PM   #5
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Re: Finishing Threshold On Concrete


I have used the quickctete mortar repair with good results.
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Old 12-04-2017, 10:07 PM   #6
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Re: Finishing Threshold On Concrete


Quote:
Originally Posted by Jay hole View Post
I have used the quickctete mortar repair with good results.
How big of gaps have you done with that??
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Old 12-04-2017, 10:18 PM   #7
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Re: Finishing Threshold On Concrete


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How big of gaps have you done with that??


I think I've gone up to 3/4" before, I didn't go back later to see how the big gap held up. But I've been back to see 1/4" to 1/2 beads months later and it still looked good. Obviously you want to make sure the threshold is properly shimmed so it doesn't flex.
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Old 12-05-2017, 12:33 AM   #8
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Re: Finishing Threshold On Concrete


I had a project where we bent a flashing that slid under the threshold and covered that space. It wasn't my favourite solution, very annoying to install on 30 doors but it gave some attractive results. I like Jay's idea of the Quikrete product, although I would probably go more towards either the stucco repair or fast set repair mortar.
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Old 12-05-2017, 07:12 AM   #9
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Re: Finishing Threshold On Concrete


The last entry door I installed I made a wood threshold with no slope to support the lip of the metal and extend to the brick mold. I still ended up with a good 3/8 gap that showed my spray foam. Not happy with that.

Not sure why. I really dont examine the bottom of the door like I should prior.
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Old 12-05-2017, 07:27 AM   #10
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Re: Finishing Threshold On Concrete


For 3/8"-3/4" I would cut a wood (or Azek) wedge.
The main thing is to make sure you are supporting the back of the threshold (inside edge) too. Otherwise the threshold collapses when ever the ho steps on it.
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Old 12-05-2017, 07:54 AM   #11
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Re: Finishing Threshold On Concrete


The back edge is supported. There's a 2X in back of the concrete that sits directly under door slab. I do shim the rest out.
That flashing i thought of doing, does sound like a lot of work.
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Old 12-05-2017, 08:49 AM   #12
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Re: Finishing Threshold On Concrete


I haven't seen a piece of Azek in 4 years! How deep is the projection from the concrete? Backerrod and NP1 was how I use to do this. The NP1 holds it's shape and is very workable with a finger dipped in mineral spirits.
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Old 12-05-2017, 09:31 AM   #13
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Re: Finishing Threshold On Concrete


I typically use mortar for that. Fast/easy and gives support for the threshold from flexing when stepped on.
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Old 12-05-2017, 03:35 PM   #14
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Re: Finishing Threshold On Concrete


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How deep is the projection from the concrete?
Varies with jam depth and slope of stoop.
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Old 12-05-2017, 04:44 PM   #15
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Re: Finishing Threshold On Concrete


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I typically use mortar for that. Fast/easy and gives support for the threshold from flexing when stepped on.


Pardon my ignorance, but what kind of mortar? Is it a bag of pre mix stuff?
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Old 12-05-2017, 04:47 PM   #16
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Re: Finishing Threshold On Concrete


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Pardon my ignorance, but what kind of mortar? Is it a bag of pre mix stuff?
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Old 12-05-2017, 06:30 PM   #17
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Re: Finishing Threshold On Concrete


If it were my decision I would put some beautiful stone down on the fugly concrete and make it pretty Superseal could make it look nice!

Otherwise I would cover that flashing with a piece of aluminum to match the aluminum sill plate. Depth could be adjusted. Box could be used. Weld up whatever is needed.
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Old 12-05-2017, 06:42 PM   #18
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Re: Finishing Threshold On Concrete


Normally I would double up the Azek to get out to the edge of the threshold and taper it fit


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Old 12-06-2017, 01:05 PM   #19
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Re: Finishing Threshold On Concrete


Quote:
Originally Posted by goneelkn View Post
How do you guys finish the gap on thresholds when the concrete stoop slopes down. I've done caulk, but lately getting some bigger gaps(1/2" - 3/4") and caulk doesn't look good.

Attachment 420849
You're lucky, usually when I have to deal with it is 3/8" on the right to 1" on the left. Exaggerating mostly, but you get the idea.

I've used Backerrod and Sikaflex for the smaller gaps.

Cut pieces out of PT or Redwood for the larger gaps. Paint to match.

Also have use Non-shrink Precision Grout:

https://www.quikrete.com/productline...isiongrout.asp

Last edited by Lettusbee; 12-06-2017 at 01:06 PM. Reason: Spelling
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Old 12-10-2017, 09:42 AM   #20
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Re: Finishing Threshold On Concrete


put a piece of matching aluminum under there and walk away

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