Leveling Subfloor.. How To Do It?? (2nd Floor) - Flooring - Page 3 - DIY Chatroom Home Improvement Forum
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Old 09-12-2015, 07:53 PM   #31
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Sorry to hear you think the job is beyond your capabilities. Maybe after you get the quote you will reconsider. Removing 2 layers of ply is really not much different then removing 1 layer. Just set the blade a little deeper. Make longitudinal cuts between the existing joists. Make cross cuts every few feet and pry up the sections.
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Old 09-18-2015, 04:10 PM   #32
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I was away from town for a week so the project was put on hold. since the contractors never called me back so I decided to start cutting myself to see what the heck is under it. It looks to be old decking from the old porch. how do I remove this stuff? is there another subfloor under that? I'm not sure how the joist is running in this room.

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Old 09-18-2015, 06:31 PM   #33
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Your floor joists are running perpendicular the original porch boards, Set your circ saw depth just enough to clear the board and cut parallel to the joists right in the middle of two joist, make a cut between each joist a few feet at time. Stopping to pull off the short boards.
Start at the farthest away location and work your way back the door.
Pull all the nails as you go.
After you remove the boards, you will only the joists tops to walk on.
A couple planks or some ply wood will help get around
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Old 09-18-2015, 06:56 PM   #34
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i've pulled up the boards and saw just as your described.

a couple of questions:

1. the current joists are 23 inches apart (center to center)... will I need to lay down more joists in between? I recall that they need to be 16 per today's standards.

2. do I need insulation between the floor? there doesn't seem to be anything currently.
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Old 09-18-2015, 07:16 PM   #35
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1) the joists are probably 24" apart, If your joist are deep enough to carry the load, you may be able to keep the spacing at 24" and use a thicker subflooring mat'l.
If you want to use the std 3/4 sub, probably easiest to just run them at 12" OC

2)what is under the floor that you need to insulate from?
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Old 09-18-2015, 10:26 PM   #36
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1) did not measure the beam thickness. will tomorrow. if I want to leave it at 24 OC, what is the thicker subfloor material I'd need?

2. it's another another room underneath. insulation is pretty poor being a patio/porch area before so i'm considering running a wall mount AC/Heat just for this room.

Last edited by vote4Pedro; 09-18-2015 at 10:42 PM.
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