How do you keep broom finish consistent on a large patio pour?

Sep 29, 2026 Last reply: 16 hours ago 5 Replies

First reply

IronWalker

Fourteen yards with only two guys on the tools is right on the ragged edge of what you can finish uniformly, expecially if the dispatch times between trucks were tight. If you try to wait and broom the entire slab in one continuous go, the finish will almost always look like…

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We poured about 14 yards for a backyard patio yesterday and tried doing a standard broom and zoom finish with two guys on the tools. The symmetry on our control joints turned out pretty clean, but the surface texture itself is bugging me. By the time we got the bull float off the far end, the first truckload was already flashing off way faster than expected. The first section has deep, gritty broom lines where it dragged the aggregate a little, while the last section we hit is almost smooth because we barely touched it before it crusted. Should I have waited longer on the wet end or hit the early stuff with a spray mist? Just wondering how solo crews or small teams balance the timing across that much mud without the finish looking like two completely different slabs.


Fourteen yards with only two guys on the tools is right on the ragged edge of what you can finish uniformly, expecially if the dispatch times between trucks were tight. If you try to wait and broom the entire slab in one continuous go, the finish will almost always look like two completley diferent pours.

Whatever you do, don't spray raw water on it to buy time or soften up a stiff section. Adding water to the surface weakens the top cream, washes out the paste, and leaves you with flaking or spalling down the road. If you're dealing with wind or sun that makes the top skin over while the bleed water is still underneath, keep a pump sprayer handy filled with an **evaporation retarder**. It locks in the surface moisture without ruining the water-cement ratio. For small crews, the trick is staging the pour in sections rather than treating it like one massive pad. Ask dispatch for a 45-minute gap between trucks. Once that first load is screeded and bull floated, one guy stays on placing the second load while the other guy starts edging, cutting joints, and pulling the broom on the first section as soon as it's ready. If you wait til the last truck is floated before touching the broom, the front end is alredy gone.

If you ever get caught with the surface crusting up faster than the slab is setting, run a **fresno** or a wide hand mag back over it lightly. That breaks the crust and pulls up just enought cream to take a light broom stroke without gouging out aggregate.

That fresno trick definately saves slabs, but one small thing to watch out for is your broom bristles. Once you hit that stiff side and drag a little aggregate, dried paste loads up in the head fast.

If you don't dunk the broom in a bucket and vigorously shake the excess water out on a scrap 2x4 between every couple passes, those caked bristles will gouge the wetter sections. Keeping the broom clean and slightly damp makes a massive difference when you're fighting uneven set times across 14 yards.

Two guys on fourteen yards is how you earn gray hair before forty. Seen it happen plenty back in the 80s when dispatch didn't give a damn and stacked trucks right on top of you.

When a pour gets away from you and the broom starts chattering on the stiff end, ditch the bristles and pull a damp burlap drag instead. We used to keep a ten-foot strip of wet burlap tacked to an old 1x3 in the truck bed for days like this. You pull that across the whole pad slow and steady. It gives you a clean, gritty traction finish without pulling out the aggregate on the hot side or leaving bald spots on the green end.

Get yourself a Marion Brush Chameleon Trac II setup. It has interchangeable color-coded bristle strips that slide right into the channel. When one end is stiffening up way faster than the other, you can run their stiff black bristles over the crusty section to get a bite, then swap to the ultra-soft green strip for the wet mud so you get a uniform line depth across the whole slab.

Costs a bit up front, but it completely solves the mismatch issue when you're short-handed.

Next time you run that much yardage short-handed, fix it at the batch plant before the trucks leave the yard. Call dispatch and ask for a 4,000 PSI mix with a 20% Class F fly ash replacement, or tell them to dose the drum with 2 to 3 oz/cwt of MasterSet R 100.

Straight Type I/II cement will flash off and burn you every time if you have even a five-knot breeze or low humidity. Setting up the chemistry right in the drum buys you an easy 45 minutes of open time so you aren't sweating the broom.

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