Installing Solid 3/4″ Brazilian Cherry

Q: I will be installing solid Brazilian Cherry, 3/4″. I want to install parallel to the longest outside wall. However, this would be parallel to the floor joists. Most of what I have read indicates that it should be nailed perpendicular to the floor joists. Installing it perpendicular would not look great. So, do I need to put down 3/8″ ply over the existing 1/2″ & 1/4 ” luan sub flooring. This is an above grade installation.
Question two: I have also read that Brazilian Cherry may split if nailed, I thought I might need to pre-drill and hand nail. Is this true?
Would using a pneumatic nailer instead of a manual make a difference? If I have to hand nail, what type of nails do I use? Thank you for your help
Robert
A: When installing a floor if you install parallel to the floor joists you reduce the strength of the floor by about 50%. In the flooring industry running perpendicular to the flooring joists is standard because it makes a floor stronger and more stable – so basically put running parallel to the joists is a no-no when it comes to ensuring your floor is optimal.
Now this being said you can install parallel to your joists if you prefer this appearance, but I would suggest avoiding very heavy furniture over the floor or you might cause the floor to sag in the areas this furniture sits.
As far as nailing is concerned I would suggest using a pneumatic nailer. Nail roughly every 6 inches at a 45 degree angle through the top of the tongue. All wood flooring has the potential to split, but by nailing through the tongue you will prevent any small splits that occur from being seen. I would not suggest drilling and hand nailing as this will not provide as much holding power as using a pneumatic nailer. Using a pneumatic nailer will make a difference as the design of the nails helps to minimize splitting as well as maximize holding power.