It was the most difficult job I've ever asked in my entire life. Many American companies refused to do it. Basically I felt badly to ask Deck Professionals to do such a horrible job. They had to cement the floor under my porch because groundhogs had made big holes, the size of my body! I needed to go sometimes under this long hot tunnel to get an animal stuck in the vent (mice, rabbits, snakes and so on...). I was afraid of the animals or falling thru the holes where the ground was not stable. Yet Deck Professionals came on time to do the job in 1 day 1/2. They had to squat to spread both gravels and cement since the long tunnel was less than 3 ft tall. I'm flabbergasted that they managed to do the job in this horrible "inferno" where one could hardly breathe.
Before hiring Deck Professionals, I did read one client's bad review (I always read bad reviews). However I decided to hire them, among others, because the other companies wanted to cut corners. I went thru youtube to understand what was necessary to install cement. I learned that one has to first install gravels and then put cement. All the other companies refused to do so. They tried to persuade me that the heaps of dust would be enough to fill the holes and flatten the ground. I told them that if gravels were not used, groundhogs could come back and eventually make the cement collapse! Those shiesty companies tried to say the contrary!