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franw01

Floor Joists Leaning and Floors Bouncy

FranW01
9 years ago

Wood frame house, two stories, about 18 years old (so legal, har har). Foundation is full basement poured concrete.

For some reason, I've noticed a increase in the bounce of my floors, and general vibration caused when someone walks across them. Today I got the bright idea going in the unfinished portion of my basement and checking how straight the floor joists are. These are enginereed i-joists. I put a right angle on the underside of the subfloor, and butted against the top edge of the i-joists. The bottom edge is almost 1/4 inch away from the straight edge. It seems that all my floor joists are leaning a good deal and I guess this is cause of my bouncing floors. Sound plausable?

What would cause this? Foundation shows no cracks and is in good shape all around. I have 2 ideas, but I know little about construction and I'd like to hear from some pros before I start with my theories.

Thank you for reading this and I could use some help!

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