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Old 03-13-2013, 08:40 AM   #1
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Firring a basement ceiling for drywall


I am finishing my basement and will be drywalling my ceiling.

I will have one area of my ceiling approx 10ft wide by 40ft long that I will need to pad the floor joist height down the entire 40 ft length to clear 3/4 inch water pipes. I have already moved everything else out of my way, but these can't be moved.

I was planning on using 2x4's on the flat, but have been told two different ways to do it.

I was told to simply pad the bottom edge of each floor joist in the same direction as they currently run and another person told me to run 2x4's perpendicular across the floor joists on the flat and just put them end to end to span the 40 ft.

I was told running the 2x4's perpedicular would be the easiest and would help strengthen the floor joists.

Was is the correct method?

Are 2x4's acceptable as it will only support the weight of 1/2 lightweight drywall?

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Old 03-13-2013, 09:53 AM   #2
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Firring a basement ceiling for drywall


2x4's perpedicular is the way to go.
The butt joints need to meet in the middle of the joist, not just hang out in the air.
Use 3" ring shank nails or screws.
Have you pulled a masons string yet to see if the joist are fairly flat all the way across the room?

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Old 03-14-2013, 10:01 AM   #3
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Firring a basement ceiling for drywall


I used 2x2's running with the joists. Any issue with that?
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Old 03-14-2013, 10:12 AM   #4
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Firring a basement ceiling for drywall


Near impossible to find a straight 2 X 2, there going to split everywhere a fastner goes in, and may sag between the joist.
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Old 03-14-2013, 10:18 AM   #5
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Firring a basement ceiling for drywall


I used 2x4s perpendicular to the joists. This also gives you the opportunity to make sure the ceiling will be perfectly level, where sheetrock directly on the joists may suffer some ups and downs of imperfect joists.
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Old 03-14-2013, 08:07 PM   #6
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Firring a basement ceiling for drywall


Who told you the flat 2x4 method would only support lightweight drywall? As far as I know 2x4's on the flat only spanning across 16" OC joists will hold normal weight drywall no problem - assuming they are adequately attached to the joists.
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Old 03-15-2013, 07:18 AM   #7
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Firring a basement ceiling for drywall


Quote:
Originally Posted by joecaption View Post
Near impossible to find a straight 2 X 2, there going to split everywhere a fastner goes in, and may sag between the joist.
When they get screwed to the joist every foot or so it straightens them up nicely. You think they'll sag if they're screwed every foot?

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