It's been a while! After a lot of growth and growing our home business and lots of hobby stuff being wedged into an overcrowded schedule, I decided 2020 will be the year of the garage. I'm finally moving toward completing the vision I had for this space. I bought a small Axiom 2'x4' CNC two years ago and found some success making/selling parts and signs off that unit and I knew all along that I would want to upgrade to a 4'x8' CNC at some point. Opportunity came knocking with a friend who buys/sells from industrial auctions and I acquired an older, but lightly used, ShopBot unit. It needed some upgrades and I first thought I was going to fix it up and turn it around for a buck but I was pretty impressed with it's relative accuracy and decided to keep it. The problem was that I pushed all my tools to the side and plopped the behemoth smack dab in the middle of the garage thinking it would only be there temporarily before I resold it. Now that I decided to keep it, it needed to be placed in it's final home but I certainly didn't want to move it before I had the long-since-planned-and-purchased tile installed on the floor under it. Once the router is in place, it will start making all the cabinetry that will go through the shop. The tile project finally started a couple of weeks ago and it feels good to be making some pretty big improvements toward finishing the place and getting the shop back in good working order.
Since I'm going with a 24"x24" through-body porcelain tile and a 1/16" grout line, and a goal of near 100% thinset contact/fill under the tile for rigidity (I rarely make it easy!), the subfloor needs to be very flat - and it's not. Each 12'x12' pad between relief joints is dished out with a variance of about 5/16" with the most severe slope at the relief joints and the walls. I ground down the high spots with an 8" side grinder and a diamond cup disk (dust collection shroud worked very well) and filled with self-leveling compound. This took an entire weekend and a couple of week nights to complete. On the next slabs, I'm going to lean toward more leveling compound and less grinding to make this a little easier.
Next up was my $100 craigslist tile saw. It was cutting like garbage. The blade would oscillate as soon as it touched tile and cut erratically and chip the edge. A new $39 arbor and $60 blade later and it's making super crisp and straight cuts.
Next up, fill the relief joint with backer rod and some cheap caulk - this is mostly just to keep thinset from getting into the relief joint. The tile will NOT be laid over the relief joints so the slabs can continue to move. This will leave a 5/16" space between tiles on pads and that gap will be filled with a grout matching caulk - again, to allow movement.
Schluter ramp profiles installed on the tile where it goes under the garage door.
And one (of six!) slabs is now tiled. These tiles weigh 18lbs apiece. They're heavy. It took four 40lb bags of thinset to do this section. My knees and hands are pretty raw this morning but I'm really pleased with how it's turned out so far. As far as my tiling skills go - I'm absolutely a novice but getting faster and cleaner. I have a good bit of cleanup to do on this section tonight.