What is the best method to prevent tile debonding?
This answer pertains to tile set on a concrete substrate!
Assuming your thin-set is properly mixed with correct water ratio,
the substrate is free of any bond breakers, and it is troweled for
the type of tile your using, the most common problem is moisture
coming up through the slab collecting at the tile/substrate
interface.
If you are in a humid climate the HVAC will pull moisture out of
a concrete into the less humid interior. Water breaks down the
thin-set bond to the tile and emulsifies other mastic's/glues
intended to secure a VCT product.
The best way to prevent moisture from wicking through a slab is
to waterproof the concrete substrate with a product that will will
stop this moisture transfer. It will also prevent the alkali in a
concrete from coming out to a surface where it reacts with an
atmosphere. Alkali burn causes a paint to bubble, peel and blister
off a concrete. With a waterproofed concrete this alkali does not
migrate out and form efflorescence salts. When you stabilize
concrete, contaminates don't enter and moisture doesn't travel to a
surface.