Quarter Round (QR) Transition From Hardwood To Metal Door Threshold? - Flooring - Contractor Talk

Quarter Round (QR) Transition From Hardwood To Metal Door Threshold?

 
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Old 12-15-2017, 09:37 AM   #1
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Quarter Round (QR) Transition From Hardwood To Metal Door Threshold?


Hi folks,

Flooring newbie here. I just finished my first engineered hardwood installation. Prior to that I'd only done a little tile.

The owner of the flooring store where I bought the hardwood sold me a quarter round (QR) to cover the expansion gap between the flooring & the metal edge of the exterior door threshold. (I did show him a picture, BTW.)

Obviously I can't attach the QR to the flooring itself, as the expansion/contraction of the floor will tear it up and/or leave a gap between the QR & the metal door threshold. If anything, the QR will have to be attached to the metal threshold.

So here are my questions:
1. Was I sold the wrong trim piece? In researching this, a baby threshold seems like it's maybe a better option than QR. But installing one now will mean cutting back the flooring to make room for it. Not a big deal, but a little time-consuming.

2. If QR is indeed a good option, how do you securely attach it to the metal threshold? I'm assuming I shouldn't drill holes into the threshold (i.e. pilot holes for finish nails)? Would construction adhesive or some other type of glue be best?

FWIW, I'd really like to do this right - I want to end up with a quality installation.

Thanks, for the help!

Steve
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Old 12-15-2017, 09:48 AM   #2
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Re: Quarter Round (QR) Transition From Hardwood To Metal Door Threshold?


Expansion/contraction of engineered flooring is minimal. If you've got a 21 guage pinner, pin the QR to the floor & use a bead of silicone where the QR meets the threshold. Silicone will stretch as much as the floor contracts. If it expands, the pins will bend allowing for floor movement that direction.

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Old 12-15-2017, 10:03 AM   #3
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Re: Quarter Round (QR) Transition From Hardwood To Metal Door Threshold?


No step height greater than 1/4" is allowed. Any rise more than that has to be no more than 1" rise in 2" run. I don't think quarter round ever meets code in this application.
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Old 12-15-2017, 10:06 AM   #4
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Re: Quarter Round (QR) Transition From Hardwood To Metal Door Threshold?


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No step height greater than 1/4" is allowed. Any rise more than that has to be no more than 1" rise in 2" run. I don't think quarter round ever meets code in this application.
You've obviously not seen some of the jobs I've worked on
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Old 12-15-2017, 10:13 AM   #5
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Re: Quarter Round (QR) Transition From Hardwood To Metal Door Threshold?


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Originally Posted by pinwheel View Post
You've obviously not seen some of the jobs I've worked on
LOL, I know what you mean.

Even custom cutting thresholds, It's impossible to meet code with wonky floors because you're allowed 1/2" for the interior threshold thickness. I'll get the step height and the slope to code and the thickness is whatever works.
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Old 12-15-2017, 10:39 AM   #6
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Re: Quarter Round (QR) Transition From Hardwood To Metal Door Threshold?


Quote:
Originally Posted by pinwheel View Post
Expansion/contraction of engineered flooring is minimal. If you've got a 21 guage pinner, pin the QR to the floor & use a bead of silicone where the QR meets the threshold. Silicone will stretch as much as the floor contracts. If it expands, the pins will bend allowing for floor movement that direction.
Thanks for the reply!

Is this true even if the fllooring material isn't man-made?

It's advertised as "engineered hardwood". Near as I can tell the flooring is made of actual wood, it's only "engineered" in that man has put it together in cross-grain layers like plywood. So it's basically 3-ply plywood with the top layer being a very nice finished oak. In other words, the materials themselves aren't man-made like a laminate. So unless I'm wrong, it'll expand/contract like a plywood. This is still much less than than solid wood, but probably more than a man-made material.

Does that change anything regarding your suggested approach, or do you think it would still work?

Oh, BTW: the room is only 11' wide, in case it matters for understanding total expansion & contraction. The flooring was allowed to acclimate for 5-7 days or so before installing.

Thanks,

Steve
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Last edited by svankirk; 12-15-2017 at 10:45 AM.
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Old 12-15-2017, 10:47 AM   #7
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Re: Quarter Round (QR) Transition From Hardwood To Metal Door Threshold?


Quote:
Originally Posted by svankirk View Post
Thanks for the reply!

Is this true even if the fllooring material isn't man-made?

It's advertised as "engineered hardwood". Near as I can tell the flooring is made of actual wood, it's only "engineered" in that man has put it together in cross-grain layers like plywood. So it's basically 3-ply plywood with the top layer being a very nice finished oak. In other words, the materials themselves aren't man-made like a laminate. So unless I'm wrong, it'll expand/contract like a plywood. This is still much less than than solid wood, but probably more than a man-made material.

Does that change anything regarding your suggested approach, or do you think it would still work?

Thanks,

Steve
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That's what engineered wood is. Instead of solid hardwood, it's a veneer on plywood. It doesn't move much. If it's floating click together style, then it may move a decent amount. Nailed down, not so much.

There are many ways to skin this cat. Glue to the threshold as you say, or nail it through the QR into the sub floor, missing the hardwood.
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Old 12-15-2017, 10:48 AM   #8
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Re: Quarter Round (QR) Transition From Hardwood To Metal Door Threshold?


Quote:
Originally Posted by svankirk View Post

Does that change anything regarding your suggested approach, or do you think it would still work?

Thanks,

Steve
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He'll tell you it doesn't change anything.
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Old 12-15-2017, 10:49 AM   #9
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Re: Quarter Round (QR) Transition From Hardwood To Metal Door Threshold?


Cross post....
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Old 12-15-2017, 11:00 AM   #10
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Re: Quarter Round (QR) Transition From Hardwood To Metal Door Threshold?


Quote:
Originally Posted by Golden view View Post
If it's floating click together style, then it may move a decent amount. Nailed down, not so much.
This is a floating installation, FWIW.

Also, I saw hdavis' reply "cross post..." Not sure what that means. Was there another post I should have read first? Did I post this question in the wrong area? My apologies, if so.

Thanks,

Steve
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Old 12-15-2017, 11:24 AM   #11
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Re: Quarter Round (QR) Transition From Hardwood To Metal Door Threshold?


Just nail it to the subfloor and be done.
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Old 12-15-2017, 12:46 PM   #12
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Re: Quarter Round (QR) Transition From Hardwood To Metal Door Threshold?


Quote:
Originally Posted by svankirk View Post
This is a floating installation, FWIW.

Also, I saw hdavis' reply "cross post..." Not sure what that means. Was there another post I should have read first? Did I post this question in the wrong area? My apologies, if so.

Thanks,

Steve
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I wrote an answer in case Pinwheel couldn't get back to you right away, but he was answering you at the same time I wrote mine. That's the cross post, he posted his before I posted mine that was just in case.
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Old 12-15-2017, 10:58 PM   #13
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Re: Quarter Round (QR) Transition From Hardwood To Metal Door Threshold?


Transition has been installed.

Brought the quarter round back to the store & got an end cap. It worked great & also happened to match the flooring better. In my opinion it also looked a little more professional than the QR. Had to trim it a bit on the table saw (i.e. rip cut), but other than than, no hiccups. Laid down some construction adhesive & nailed it to the subfloor.

BTW, in this particular case the QR would only have overlapped the flooring by about 1/8". I didn't feel comfortable with that, which was one of the main reasons I brought it back. The other is that it was vinyl & didn't do the hardwood justice.

Thanks for all your help, folks - I really appreciate it!

Steve
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Old 12-15-2017, 11:40 PM   #14
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Re: Quarter Round (QR) Transition From Hardwood To Metal Door Threshold?


If someone would give me vinyl to match hardwood I'd probably slap them, no thanks I'll just make my own.
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Old 12-15-2017, 11:54 PM   #15
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Re: Quarter Round (QR) Transition From Hardwood To Metal Door Threshold?


Quote:
Originally Posted by avenge View Post
If someone would give me vinyl to match hardwood I'd probably slap them, no thanks I'll just make my own.
Thanks for confirming that. I look back now & wonder why he suggested such a mediocre transition for such nice flooring. Live & learn, I guess...

Steve
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