OT: House flooring Q's, Sub-floor? Options

[Kerrys914]

(IMG:http://www.914world.com/bbs2/html/emoticons/smash.gif) I am/will be pulling out some old carpet and vinyl flooring out of a living room and kitchen.

Is/could there be an extra layer of sub-flooring under the vinyl flooring in the kitchen? I am putting in some hardwood/laminate flooring in both spaces and want a seamless look to the two spaces.

I am not in the house yet so I can't pull the flooring up to look. I thought it might be a common practice thang to use an extra layer of sub-flooring???

Garage will be done after the 1st floor is done.. (IMG:http://www.914world.com/bbs2/html/emoticons/driving.gif) (IMG:http://www.914world.com/bbs2/html/emoticons/aktion035.gif)

Cheers

[Dead Air]

QUOTE (Kerrys914 @ Mar 24 2006, 05:18 PM)

(IMG:http://www.914world.com/bbs2/html/emoticons/smash.gif) I am putting in some hardwood/laminate flooring in both spaces and want a seamless look to the two spaces.

[QUOTE]

When you say "hardwood/Laminate" do you mean a flooring like "Purgo"? A floating floor? Or plywood planks that have a finished surface that will nail or staple?
Depending on the space you may be able to leave the kitchen floor.
Hear me out.

I have know idea what your layout is but regardless you'll have to put some type of threshold at the areas I've colored red. If your boards run in the direction in the illustration and they have any flex to them at all, you can use thin set floor leveler to build up to the high spot in the area indicated in grey.
If you're using 3/4" hardwood planking it won't work because the butt ends won't sit flush together.
I think you'd save alot of time. Just make sure to "prime" the plywood with "Levelquick" latex primer to make sure you get good adhesion under the floor leveler.