If you are building a new home, by the time you get to flooring it will be dry.
You need 1 1/4" of subfloor. Typically it is 3/4" of plywood or OSB and 1/2" of mudbase or cement board.
I think you mean sub-floor. There are a few standards. 3/4 plywood or osb. 1 1/8 Plywood. 2 x 6 tounge and groove pine. Each has its advantages. I would consider the 1 1/8 T&G plywood to be the minimum standard.
It will dry just fine... after you remove the flooring...
A subfloor is a structural layer that provides a base for finish flooring to be installed on top of it. It is typically made of plywood or oriented strand board (OSB) and provides a flat, level surface for the finish flooring to sit on. The subfloor helps support the weight of the flooring, distributes loads, and helps with insulation and soundproofing.
under a foundation of a sub.
Usually yes, a well insulated sub-floor will save you lots of money from heating. You can choose to build a sub-floor on 2x4 lumber with moisture barrier or use those sub-floor tiles (usually come in as 2x2).
A subfloor is a base floor for main floor like if you are willing to have under floor heating system then a floor is built first then the main flooring is made so basicall base floor of main floor is subfloor. subfloors are generally made from at least two layers of moisture resistant ('AC' grade, one side finished and sanded flat) plywood or composite sheeting.
OSB stands for oriented strand board. It is made of wood strands and waterproof adhesives. The strength of OSB board is equal to that of plywood.
If someone wanted to purchase an OSB there are a variety of places where someone can do so. Some of these places are Calibex, Fordaq and cheap osb and nsbe.
Dricore
to support the sub floor.
The type of underlay you need will depend on the type of sub floor or floor you are putting the laminate on is made of. If the sub floor is made of concrete, you would want vapor barrier underlay. If the sub floor is made of wood a standard or premium underlay would used.