Cut Floor Joist High Spot

The joist on the other side of the crowned joist was properly level meaning it was in plane with the end joist.

Cut floor joist high spot. Start by cutting out a small 1 2 in 2 5 5 1 cm section of the floor joist with a reciprocating saw. Essentially a hump on the floor was created by the excessively crowning joist. I noticed the high joist when i removed the old carpet. The most basic method is to take a piece of tar paper fold it in half and then push that.

Then use pry bars and your reciprocating saw to pry and cut the floor joist away from the subfloor. I cut out a span of plywood over 3 joists total the high one in the center planed it down with my electric planer and was able to reset the same subfloor i cut out. Minor high spots for hardwood and laminate floor installations are easily fixed with tar paper shims. The joist underneath the hump may appear thicker than the joist on either side of it because of moisture.

Use a circular saw to remove the subfloor to expose the high joist. We considered it but we just weren t going to do that. Step 2 look at the joist. I pulled all the nails first then cut the path the nails were on with a saw set to depth of the subfloor.

Shear is what would cause the joist to break in half and the floor to collapse an unlikely outcome unless the joist is extremely overspanned overloaded or heavily modified. If the cut outs are too large or in the wrong location the joist can be weakened and unable to support the load it was designed for. Bending however is a more realistic concern because it takes much less load to exceed the allowable deflection of a floor. It s a sign of a high spot.

Fixing a low joist is pretty straight forward. To address this unique area of the floor we decided to remove the existing 5 8 inch osb plane the joist using a standard handheld planer and install. To remove the existing floor use a circular saw. Cut only the area where the hump is not the entire floor.

This will create a weak spot. A floor joist will bow upward creating a heaved area on the floor above. What we found is that one technique is to pull up the subfloor and shave down the top of the joist. Back to addressing the high spot.

High areas in the floor are called heaves and low areas are called dips. A high joist is a different conundrum. Jack it up and sister join another joist to the original one.