Postby OLBC Group » Tue Sep 20, 2022 7:44 am
Yes, your builder is correct.
Solid hardwood will crack pretty quickly.
How it feels underfoot is more about surface preparation? It sounds like you want a more rustic surface finish. These are available in some brands.
You also need to use a flexible adhesive to allow for the differential movement of the floor substrate.
Good luck with the project