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Floor Bounce

Question: When I bought my house, the VA inspected it, and i also paid for a home warranty inspection (not required). Both gave me the thumbs up. I wish I had crawled under the house myself. I would have noticed that the floor joists were 2x8. Well 2x8s on a 10-foot span doesn’t seem kosher to me. Luckily all the plumbing is run below the joists, and I am planning to sister 2x8s to the existing joists with glue and nails, and this will hopefully take the bounce out of my floor. Suggestions or comments.

Answer: It is not going to be easy to maneuver the new joists into position and on to the sill plates. Remember that the crown must face up and the weight of the current floor is forcing the floor joists to flatten at the crown. Although you said that the plumbing would not be a problem, what about the electrical?

Without seeing the actual positioning of piping this suggestion may not be workable. I would run a double joist perpendicular to the old joists down the middle of the floor, so that the old joists were now supported in the middle as well as the ends. Depending on where you are, you may have to put in a footer, but only at both ends.

Additional information on floor construction.