Getting ready to start writing up plans for the city, wanting to enclose/finish covered patio into small family room. Wondering the best course of action for the foundation, current slab is about 6″ thick and in good shape. Was thinking of pouring a 6×6 concrete raised edge around perimeter of existing slab to match the homes foundation and for the bottom plate of 2×6 framing, and running 4×6 floor joists with 3/4 ply subfloor. Or am I likely gonna have to tear out old, and pour new slab with footings, attached photos of current layout. TIA!
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Speak to your building department and ask what they require. Most likely you can keep the slab on grade but you will need to open up and pour footings at load bearing points