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Old 10-27-2013, 07:18 PM   #16
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New Construction Flooring Question


I suppose with new construction, these wouldn't be 2x floor joists. But with 2x floor joists one often sees low spots and high spots because the framers didn't crown the joists and/or throw out the very bad joists.

I did some work on a house which had footings which simply had a low spot. So there was a big low spot on the basement slab, then (you guessed it) a low spot on the main level. I imagine the roof had a dip in it in that area as well.

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Old 10-27-2013, 07:46 PM   #17
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Originally Posted by joecaption View Post
How about some pictures of the joist from the basement.
I'd be down there pulling some strings to see what's off.
If the boards are really cupping then there's a moisture issue.
Here are some pics directly below where there is some waviness in the floor.
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Old 10-27-2013, 07:48 PM   #18
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Curious what you mean by this statement.

What size are the floor joists? Pics from below?
I mean that it seems like the wood floor is expanding causing the boards running parallel to almost form a subtle peak, causing the waviness. I've attached some posts from the basement. Hopefully it'll help shed some light.
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Old 10-27-2013, 07:50 PM   #19
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Is it me, or did the plumber cheat and use Crimp on fittings for all that Copper. Also they most likely set the floor joists, so that bow was set down, not up towards the flooring.
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Old 10-27-2013, 07:51 PM   #20
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Very few hardwood floors are perfectly flat. They respond to changes in the environment.

It's also been very dry this October - I'm in MA too. If anything, the boards should be shrinking and gaps opening - especially if you have the heat on.

What is the humidity level in the house? Are you running a humidifier?
This is the exact assumption I've been working under. During the summer with all the moisture here in New England, the boards would have expanded at that point and casued some waviness. Now with the dry winter months approaching, I'd expect the boards to "shrink" back down and there to be no waviness. But now the waviness seems to be more prominent than before.

Not sure of the humidity level. It's forced hot air and central air, so the humidity should be well controlled throughout the year.
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Old 10-27-2013, 07:53 PM   #21
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Is it me, or did the plumber cheat and use Crimp on fittings for all that Copper. Also they most likely set the floor joists, so that bow was set down, not up towards the flooring.
You're correct, all the plumbing is crimp fittings...
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Old 10-27-2013, 07:57 PM   #22
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I keep our home Relative Humidity between 49-65, depending on the season. Right now it is at 58 upstairs, 55 down in the basement. Temp upstairs 72f, downstairs 65f. We keep our heat around 68 during the day, 65 at night.

I find that any drier or any warmer, my wife's allergies act up and my sinusitis also starts to act up. Even at my workplace, it is about the same during Winter, so that static stays down, and everyone is a lot more comfortable.

gilbo125, I use a Radio Shack Indoor/Outdoor Weather monitor, with one sensor in our basement, the main unit where I sit all the time, and another up in the attic. No humidifier on our hvac, no dehumidifier used in the basement, since we have the rh kept at a pretty good point. If it does start getting too dry in the Winter, we will fire up a portable humidifier to get some moisture in the air, once the temps start dropping down to low 20's.
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Old 10-27-2013, 08:00 PM   #23
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You're correct, all the plumbing is crimp fittings...
Lets hope that you do not run into any problems with them leaking in a few years.
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Old 10-27-2013, 09:58 PM   #24
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Wow! You do have 2x floor joists.

So I would say that they didn't crown the joists.

The funky fittings on the copper are another indication that things are screwed up. If you see one mouse, you know there are 50 in your house.

As gregzoll mentioned, I would certainly be monitoring the humidity. If you have wood floors, you want to keep the humidity constant. Do what you want, but I prefer a humidifier on the furnace.
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Old 10-30-2013, 07:49 PM   #25
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At least they didn't cheap out on the subfloor (advantech) Why on earth would someone use 2x joist and buy the most expensive subfloor out there? Crazy....

I didn't see any cupping either. If the humps and bumps bother you that much, you could scab in another floor joist beside the one with the dip in it.

Discount Hardwood Flooring

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