How long will it take to strip and wax 18000 square feett of tile floor?

You have to break this prjoect up into 3 areasL strip, finish and dry time.

Assume that you are only going to strip 1000sq. ft per hour. This includes the actual stripping, wet vacuuming and rinsing, also, you've got to factor in scrapping (edging) and going back over any spot you might miss. If you're taking on a job that may have been potched by other people or neglected for a long time you may not even get 1000 sq feet done per hour. Assume for instance that you've been asked to do a floor that never got stripped but rather just scrubbed and recoated, for seveal years. You could be looking at 5, 8, 10 layers of finish in the floor. Assess jobs beforehand so that you can price them correctly.

Then, laying the finish, assume that you will apply finish at a rate of 8000 - 10,000 sq feet an hour, or course, this number will go down if you have to travel to multiple rooms, have to work in tight spaces, etc...

Then assume 45 minutes drying time per coat of finish. This figure come double or triple if you are work in an area that does not have good ventilation or excessive humidity.

So, the long answer is that no two jobs are the same and to apply a standard per square footage price to floor work is risky and can cause you to cut corners to make the numbers work or it you're like me and care about the finished product you can lose money. Unless you are familiar with the floors in question and now how they have been maintained it may be best to agree to an hourly rate for the first job and then a per square footage charge thereafter.

This was fun, feel free to direct questions to me at nccleanteam@gmail.com