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Old 07-07-2018, 04:18 PM   #1
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Leveling living room floor


Looking for some input on leveling my living room floor: The slope is too much for self leving compound and I want the living room floor level with the kitchen floor as it is now 1 large open space.

-The living room was added to the house in the mid 1920’s and has a stone foundation.

-The North side rests on the original foundation of the house that was built in the mid 1850’s! All stone foundation.

-The east side is connected to the kitchen that was added in the mid 1990’s

-The span of the room is 16X24. The floor joists are true 3X8x16. None are cracked or broken.

-The floor has a bad slope towards the oringinal foundation. And part of the living room floor is about 1/4 an inch higher than the kitchen floor.

- The sill plate is solid doesn’t have any rot or bug damage. It appears the slope is all due to age of the house and settling of such.

-The crawlspace beneath the area is as dry as can be no matter how much rain/water we get.

Can I take conventional 2X8s? 2x6s? Lvl? and sister them to the existing floor joists in orded to level it the necessary amount? I plan on installing pillars beneath the floor as extra precation for long term. The current subfloor is tongue and groove oak 1” boards. I also plan on removing these and using them for projects around the house and replacing with 3/4” subfloor. Which will help make up the few high spots throughout the floor.

Thanks in advance for any help
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Old 07-07-2018, 04:22 PM   #2
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Also the current floor joists are 18” oc. I plan on using 3 1/2” nails courtesy of my air nailer to attach them. With either carriage bolts or some type of adhesive to keep them in place. Any thoughts there?
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Old 07-07-2018, 04:59 PM   #3
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Re: Leveling living room floor


Sounds like a plan, glue and 3" nails will be fine. The old lumber will be hard and the gun may not want to sink them.
As you are over 16" OC I would move up to a thicker Advantech subfloor
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