You could only do this if there is sufficient space between the existing slab and your door (otherwise the flooring would prevent the door from opening). You would then place your wood porch flooring over the sleepers. Another option of course, is to remove the concrete entirely and rebuild the porch from the ground up
To improve the look of a concrete slab porch a layer of solid brick pavers can be added on top of the existing slab. Watch this video to find out how
Aug 17, 2017 . repairing wood paneling . Building a Roof Over a Deck or Patio . If local codes allow setting the overhead directly on an existing slab but the concrete is not thick enough to support the overhead's weight, you will have to pour new footings around the slab's perimeter or break out sections and pour deeper..
Mar 7, 2018 . But the nutshell version is that I'm building a wood porch over my existing concrete front porch. So to do that, I had to install wood risers using pressure treated 2 x 4's rated for ground contact (ripped to the correct height to level the final porch floor), attached to the concrete with exterior construction adhesive..
Install a ground-level deck over a concrete patio. . A sleeper system is a substructure comprising joists that sit between a solid surface (such as concrete) and the decking. Ground-level (and rooftop decks, . Pressure treated wood and recycled plastic lumber are both considered excellent choices for durable sleepers