I did two slabs last week in Toledo. Same mix, same weather. One I finished by hand, the other I ran the power trowel over. The hand troweled one came out way denser. Less dusting. The power trowel one looked good at first. But after three days the surface felt softer. I think power trowels burn the cream too fast. Am I crazy or does hand work still beat machines for durability? Anyone else notice this on their flatwork jobs?
I used to swear by hand finishing for everything, but I finally tried a power trowel on a 30x40 garage floor in Akron yesterday. It cut my time in half and the surface came out way flatter than I ever got by hand. Has anyone else gone back to hand tools for something specific or am I the only one?
I was out on a job near Columbus last August, pouring a 30x40 foot garage floor. Got so caught up in setting forms I completely spaced wetting the subgrade before the truck showed up. Ended up with a bunch of spider cracks from the concrete drying too fast on top. Anyone else learned this lesson the hard way, or was it just me being careless?
I was picking up some rebar wire at the supplier in Denver and this retired finisher, must have been 70, saw me loading up. He just walked over and said "son, you're dragging your mag too slow on the edges." He showed me how to speed up the float pass by about a third and get a smoother finish without extra labor. I tried it on a garage slab the next week and it cut my edge work time by almost 15 minutes per pour. Has anyone else gotten advice from a stranger on site that actually stuck with you?
We were finishing a 40-yard driveway and the stuff made the surface slick as ice - couldn't get a decent broom finish no matter what we did. Ended up having to power wash the whole thing the next day and re-spray it with a different agent. Has anyone else dealt with a release agent that just doesn't work right with their mix?
Poured a 10x12 patio slab for a lady in Arlington and everything looked perfect when we finished. Next morning I drove by and there was a hairline crack running right through the middle, maybe 8 feet long. I think I went too light on the control joint cuts since I was trying to make it look seamless for her. Has anyone else had a crack show up that fast and what did you do about it
I used to always start my broom finish way too early when the concrete was still too wet. The lines would just smear and look terrible every time. About 2 years ago I started waiting until the water sheen was completely gone before even touching it with the broom. Now I get clean straight lines every pour. Anybody else struggle with timing on this or is it just me?
I did a driveway last week in Omaha that reminded me of jobs I did back in 2008 with my uncle. Back then we'd wait for the bleed water to burn off naturally no matter what. Now everybody's out there with a blower or a rake trying to speed things up. Has anyone else noticed the finish just doesn't hold up as well when you rush that initial set?
I had a guy with 30 years in the trade tell me I needed to keep my driveway slab wet for a full week without letting it dry out even once. I followed his advice exactly, soaked it every few hours with a hose and covered it with wet burlap. After day 4 I noticed some surface crazing starting to show up, tiny hairline cracks all over. I stopped after day 5 and let it dry normally, and now at 3 months old that slab has more surface checking than a neighbor's job that only cured for 3 days. Maybe it was the mix we used or the weather being too hot that week, idk. Has anyone else seen wet curing backfire like that on a residential pour?
Was finishing a 40 yard driveway slab and the blade just seized up, threw me off balance and messed up the edge something awful. Had to grab a hand trowel and fix it by eye... anyone else had a tool crap out at the worst possible moment?
He told me to use a speed square to check my riser heights before every pour instead of trusting the forms, and after trying it on a 16-step front porch in Austin last month I only had to grind down one tread. Anyone else got a weird tool they use for steps that isn't standard?
I was dead set on never going back to hand-buggying after we got a pump, but watching the crew rally and get that slab poured before the sun set made me realize there's something to be said for the old way when the equipment fails.
I used to always wet the control joint line before cutting, thought it helped the blade last longer and made a cleaner cut. Then a guy with 30 years on me watched me do it and said I was just making mud that would gum up the works and slow me down. Switched to dry cutting last summer on a big driveway job in Phoenix, and I'm never going back - anyone here ditch the water trick too?
Last month I had a 12,000 square foot warehouse floor to pour and the customer wanted it done in 3 days. I had to choose between spraying on a membrane curing compound or going with wet curing and burlap. I went with the wet cure because the rep at the supply yard warned me about surface dusting with compound in that heat. It took 4 days of constant watering and I had to hire an extra guy just to monitor moisture. The final surface came out at 4,500 psi with zero cracking, but I lost a full day to the extra work. Has anyone else dealt with curing failures from rushing to meet a deadline?
I figured a magnesium float would just smooth things out faster, but the darker color surprised me, has anyone else seen this happen with certain mixes?
Back when I started finishing 12 years ago in Phoenix, I used to spend 45 minutes bull floating every slab until it felt like my arms would fall off. Then I watched a seasoned crew at a warehouse pour just use a heavy roller to knock down the high spots in 10 minutes flat. I tried it on a 30x40 garage floor last August, and it cut my leveling time by half with way less strain. Now I only pull out the bull float for small patches or tight corners where the roller can't reach. Has anyone else made this switch, or do you still swear by the float for everything?
I bought this premium sealer from a supplier in Phoenix last month because the guy swore it was the best for desert climates. Spent a whole Saturday applying it to a new driveway, followed the directions to the letter. Next morning it had turned this awful milky white color instead of clear, looked like a mess. Called the supplier and they said I must have applied it wrong, no refund. Anybody else get burned by a sealer that looked promising but ended up being total junk?
The mix came in way too wet because the plant forgot the water reducer, and I ended up having to bullfloat everything twice just to get the surface right. Has anyone else had a supplier screw up a load and leave you scrambling to fix it?
I was pouring a garage slab in El Paso about 6 months ago and everything looked perfect when I floated it. The homeowner came out with his laser level and showed me a 2 inch dip right near the overhead door track. I had been bull floating the same way for 5 years, always starting at the same corner and working straight across. Turns out I was pushing too much material to one side without realizing it. He wasn't even mad, just pointed it out and asked if I could fix it. We had to chip out a 4x4 section and patch it, which took 3 extra hours. I started alternating my float pattern after that and my slabs have been dead flat ever since. Anyone else have a moment where a simple habit was screwing up their work?
I've always used a regular wood float for that initial pass, but a buddy at the supply house in Waco talked me into trying a magnesium one. The difference was crazy - it closed the surface way faster and left almost no drag marks. I finished that 20x24 slab in about 45 minutes less than usual. Has anyone else switched floats and seen a big difference in their finish time?
I had been doing flatwork for about 4 years and thought my edges were decent. This one foreman on a warehouse job in Oklahoma City walked over and pointed to a corner I had just finished. He said "look at that edge roll, you're floating too flat into the corner." He showed me how to work the corner with a margin trowel first before the edger. Now I hit every corner twice and the finish looks way sharper. Anybody else have a tough foreman that taught them something they still use?
I used to always go back and forth with the float until it was glass smooth, thought that was the mark of a good finisher. Then this old foreman in Phoenix pulled me aside after a big slab job and said look at the crazing lines forming. It hit me that all that extra travel was pushing fines to the surface and making it weak. Now I do 2 passes max and let it set faster, way less cracking issues. Anyone else fight the urge to keep troweling?
Had this house on a hill where the concrete was sloping like crazy. Tried my normal stamping sequence and the pattern kept slipping and smudging. After three messed up sections I grabbed some scrap plywood and cut it into a few flat platforms to stand on. Used those as stable spots to work from and it kept my weight even. Finished the whole job without a single blowout. Has anyone else found a weird fix for slopes that doesn't involve full reshoring?