And here I have been calling it the Trampoline effect all these years.

Now I know the real term.

I see that trend here as well, the "good" builders seem to use better materials than then the new builders starting up

Bounce to the ounce!

Never would have guessed that one!

Interesting.  Majority (like close to 99%) here use solid and I so prefer it.  Solid has fewer call backs and lasts way longer and looks way better.  Engineered is basically only used over concrete.  And, yes, I get tons of people in the new nicer (i.e. Million $+ condos) calling all the time w/ issues in the engineered flooring which can not be fixed.  They usually need to be completely replaced in the whol apartment.

Thanks for the deflection lesson.

Not familiar with the term. Thanks!

Thanks for the education, Barbara.

Knew it from watch Mike Holmes bounce on kitchen floors. Didn't know that you could go further than 16" on engin. wood.

Can't remember ....

zero if it's concrete!

Are you posting the answers to the questions right away? Seems I can never get to answer then because the answer is there already LOL

As soon as you mentioned the word --- I remembered --- thanks for the reminder and the explanation.   

No shrinkage is a good thing ... right Michael Jacobs 

Our builders use engineered wood in our area too. It does prevent call backs.

Spring

No idea.

I would have to look it up. What if the floor is both bouncy AND sloped

Barbara Todaro - this is something I remember from my science lessons....lol!

Once again you have taught the masses

I personally don't like a lot of deflection but also like a little give. Much of our construction is moving away from floor joists to poured concrete.