c/concrete-finishers

I think the push for super flat floors on every job is overkill now

I finished a warehouse floor in Dallas last year that called for a Ff/Fl of 50/40, which is crazy flat. We spent three extra days with ride-on trowels and laser screeds, and the client paid nearly double. Six months later, I drove by and the whole space was full of heavy racks and pallets. You couldn't see an inch of the floor. We killed ourselves for specs that didn't matter for the actual use. I see this a lot now, specs written by an engineer who never steps on a site. For a basic shop floor or garage, a good hand finish is plenty. When did we stop asking what the slab actually needs to do? Has anyone else had to push back on specs that just add cost for no real gain?

Shoutout to the guy who told me to try a 1/2 inch bull float on a 4 inch slab

I did it on a garage floor in Denver and the finish was way too wet, had to go back over it with a magnesium. Has anyone else had a tool recommendation backfire like that?

The day I had to fix a cold joint on a 20-yard driveway pour in Spokane

We were finishing a big driveway and the truck got stuck in traffic for over an hour. By the time the last load showed up, the first section had already started to set up hard. I told my helper, Mike, we had to scarify the edge with a grinder and use a bonding agent before we could place the new concrete, even though the homeowner was mad about the delay. It held up fine, but it added three hours to the job. Has anyone else had a truck delay that bad and what did you do?

Update: The city inspection delayed our slab for hours.

We had everything set for the pour, but the inspector was late and picked on small stuff. The mix began to harden before we could get it smooth.

Our quick tarp save during a sudden storm

During a driveway pour, a storm blew in out of nowhere. We had tarps ready and threw them over the wet concrete. It kept the rain off and let us finish once the weather passed. Always keep covers handy, it paid off big time.

Stopped a stranger from ruining their patio with wrong mix tips

I was at the hardware store and overheard a guy telling his friend to use any sand for concrete. I had to step in and explain why that's a disaster waiting to happen. It's crazy how many people think mixing concrete is no big deal. This trade takes years to get right, and bad advice can cost thousands. Do you ever correct DIYers when you see them making big mistakes?

I was wrong about small crews on big jobs

Always thought you needed more hands for a driveway. That three-man pour last month came out perfect and fast.

My handmade concrete birdbath is crumbling at the edges after one season

I built this birdbath as a hobby project last year. The edges are falling apart, probably from the winter weather I didn't plan for. What mix tweaks help with durability in areas with big temperature swings?

Showerthought: Concrete countertops seem to be all over home reno feeds now.

Lots of homeowners are giving it a shot. I'm curious if they realize how tricky the finish can be.

Serious question, I used to let concrete dry out right after pouring, but now I wet cure it for days.

It makes the slab way stronger and cuts down on cracks, which saves me headaches later on.

Vinegar soak fixed my streaky float marks.

Saw a tip in a trade mag. Tried it and the results were spot on.

Now I keep my admixtures on a separate shelf after the great soap incident

Warning: Dubai job made me rethink polymer additives

I always skipped polymer mixes thinking they were a waste. A project in Dubai showed me they prevent shrinkage cracks in the sun. Totally worth it now!