I forgot the mandatory 3/8 gap around the outside edges

Q: I got half way through laying down my hardwood when I realized that I hadn’t left the ‘mandatory’ 3/8′ gap around the outside edges. Obviously, this is necessary for expansion.

I will finish the job leaving the gap. Am I doomed to see warping or lifting in the section without the gap?

A: Not necessarily. If you feel humidity is a problem, buy a dehumidifier.