This has been posted in the past to explain what 'Capturing Max Expansion" means....
"I will try to better explain 'capturing the expansion' ; This is the best example of what I am trying to explain -
Let's say we are in Arizona and in the center of a large parking lot with no obstructions. If we take a floor that is 25'x25' place it in the center of the lot in the early am and park two cars on it, one on each end, let's also say it's around 50 degrees this morning. By mid day we are seeing temps of 90+ degrees and the floor now has a huge wave in it.. The reason, the floor has expanded and can not push the cars out, so it goes up ( the path of least resistance).
Now let's try this again, We place the floor out in the center of the lot in the early morning, but we do not park anything on it. Later in the day we come back and the floor is flat and perfect. Now we drive the same two cars on the floor at mid day when its 90+ degrees out and have no issue, we come back in the morning and it's still perfectly flat, we come back at mid day again and yes! it's still flat...Why? Because in the middle of the day when it was 90+ degrees out and nothing was on the floor, it was at max expansion. When we rolled the cars on it and later cooled, the floor could no way contract and pull the cars in.
This example is the same if we had placed heavy objects like cabinets, tables, lawn mowers, boxes, bikes, chests, lifts, etc... when it was hot. The smallest items can cause an issue ( like up against garage door rails. lag bolts stick out from concrete, trimming too close when tiles cold, etc) ".
My personal garage floor has been in for nearly a decade, faces west, sees temp swings in the summer of more that 30-40 degrees each day, has a 4 post lift, and cabinets. I have zero expansion issues.