timber flooring

[trueee]

I have a vic ash floor that has recently been refinished and coated with polyurethane .I have noticed that is cupping andis this preventable or curable. the floor is about 30 years old with some new timber aswell can anyone help thanking you trueee

[soundman]

check your under floor ventilation. excess moisture may be causiog your problem.
If that is you case fix the moisture problem & the cup mught fix its self