I have a 14 x16 foot 9" thick cement patio with tiles on it. I want to make it into a sunroom. Right now the floor is sloped away from the house and the difference from the house to the edge of the patio is at least 3 1/2 inches sloped downward for drainage.
I looked into leveling compound but the cost to do that large of an area is cost prohibitive. Is there a good method of doing it. I was told if I used bevelled wooden floor sleepers to correct the slope, there would be too little air space beneath without ventilation and the wood would eventually rot.
Has anyone corrected something like this or does anyone have some ideas?
Thanks, Spirock