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Safety Cue
Task-specific safety guidance for ordinary work hazards.
Project 17
Float, Edge, Joint, and Finish a Concrete Slab
Complete the same slab placement begun in Project 16 by floating, edging, jointing, texturing, curing, protecting, and inspecting the surface at the correct concrete-finishing stages, without allowing the slab to miss its finishing window.
Field Cue System
These cues appear at the point of work. They identify safety, code, manufacturer, and measurement issues before they become a torn surface, a failed joint, or a rejected finish.
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Critical Safety Cue
Serious injury, structural risk, or major damage is possible.
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Field Safety Cue
Practical work-area safety: power trowel machines, saws, and wet-concrete footing hazards.
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Code Alert
Local requirements vary. Verify permit, inspection, and jurisdictional rules.
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Manufacturer Cue
Follow product-specific instructions for curing compounds and joint-filler systems.
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Measurement Cue
Reference-point, tolerance, and control-line guidance.
Job Overview
This project qualifies you to complete the slab placement begun in Project 16 by bringing the wet, screeded surface through bull-floating, edging, jointing, hand and machine finishing, texturing, curing, and protection. Project 16 and this project are separate instructional and assessment sections of one continuous slab operation. The concrete placed and screeded in Project 16 does not stop for a chapter break; the finishing crew must be staged and ready before discharge begins so the slab moves directly from screeding into the operations described here.
The finished work product is a floated, edged, jointed, textured, cured, and protected residential concrete slab meeting the surface-finish specification called for by the approved plans, together with a completed Slab-Finish Inspection Record documenting the timing, methods, joint installation, curing start, and any repairs made before the crew left the site.
You will evaluate the concrete's readiness for each finishing operation by its actual condition rather than by elapsed time, bull-float or darby the surface, edge the perimeter and formed openings, tool or plan for sawed control joints at the correct locations, sequence hand and machine finishing passes to the required texture, protect embedded items and drains during finishing, begin curing at the correct surface condition, and inspect the finished slab for tearing, scaling, dusting, and joint defects before turning the work over for continued curing.
Skills You Will Demonstrate
- FN-097 — Bull-float or darby the screeded slab surface using the approved direction and overlap, correcting ridges and low areas while the surface remains workable.
- FN-098 — Edge the slab perimeter and formed openings to the specified radius and depth.
- FN-099 — Cut or tool control, construction, and isolation joints at the planned locations, timing, depth, and spacing.
- FN-100 — Finish the surface texture using hand floats, power floats, trowels, or broom/texture tools as required by the finish specification.
- FN-101 — Protect the slab surface by beginning the specified curing method at the correct concrete condition and barricading against traffic, weather, and early loading.
- FN-102 — Inspect the finished slab for tearing, scaling, dusting, ridges, birdbaths, joint defects, and finish inconsistency, and document the result.
Where This Skill Fits
Project 16 placed, consolidated, and screeded the slab and brought it to the correct elevation and initial surface condition. This project takes over at the exact point Project 16 ends: the same wet concrete, the same crew, the same continuous operation. Nothing in this project may wait for a later work session. The floating, edging, jointing, and finishing sequence taught here depends entirely on reading the concrete's actual bleed-water and stiffening condition, a skill you will use again any time this book calls for timed concrete work.
The curing and protection steps performed at the end of this project connect directly to the curing discipline taught in Project 09 and carried forward through the capstone in Project 20, where the finished slab is inspected one final time before the foundation is handed off to framing.
Scope and Intended Use
This project covers:
- evaluating concrete condition before each finishing operation rather than working solely by elapsed time
- bull-floating or darbying the screeded surface and correcting ridges, low areas, and screed marks while the surface remains workable
- allowing bleed water and sheen to dissipate to the required condition before later finishing
- edging the slab perimeter and formed openings to the specified radius and depth
- tooling joints where the design uses tooled joints, and saw-cutting control joints at the specified timing, depth, spacing, and sequence where the design uses sawed joints
- sequencing hand float, power float, trowel, fresno, and texture passes according to concrete condition and the specified finish
- protecting drains, depressions, edges, penetrations, and embedded items during finishing
- beginning the specified curing method and barricading the slab
- inspecting the finished slab and correcting only conditions that can be repaired without causing greater damage
This project does not authorize the learner to:
- begin finishing operations on concrete that has not reached the required condition for that operation, regardless of schedule pressure
- select a joint location, spacing, or depth different from the approved joint plan
- substitute a curing method different from the one specified without authorization
- attempt a structural-level repair of tearing, scaling, or cracking that exceeds a documentable minor correction; such conditions are referred to Project 18 or to qualified review
- operate a power float/trowel machine or a concrete saw without the tool-specific instruction required in Section H
Any surface condition that cannot be corrected without causing greater damage must be documented and referred for evaluation rather than concealed by additional working of the surface.
Reference Conventions
Establish these references before any finishing operation begins, and evaluate concrete condition continuously rather than assuming it from the previous check.
| Term | Definition |
|---|---|
| Bleed water | Water that rises to the concrete surface after placement; finishing operations must not begin until it has dissipated to the condition required for that operation |
| Workable condition | The concrete condition at which a finishing tool can still correct surface irregularities without tearing or displacing the surface |
| Tooled joint | A control, construction, or isolation joint formed with a hand or walk-behind groover while the concrete is plastic |
| Sawed joint | A control joint cut into the hardened or early-hardened surface with a saw at the specified timing, depth, and spacing |
| Finish specification | The approved surface texture and flatness requirement — for example, broom, float, or trowel finish — controlling which tools and passes are required |
| Curing start | The point at which the specified curing method may be applied without damaging the surface; this point is determined by surface condition, not elapsed time |
Finishing and Joint Record
Before beginning bull-floating, record the specified finish and joint method directly on the Slab-Finish Inspection Record:
Site name/address: ______ Specified finish: ______ Joint method (tooled/sawed): ______ Specified curing method: ______
Date/placement continued from Project 16 log: ____________ Finisher name: ____________
Prerequisites
- Completed Project 16 placement, consolidation, and screeding, with the slab turned over to the finishing crew at the correct surface condition
- Access to the approved surface-finish specification, edge-profile detail, joint plan (tooled or sawed, with location, timing, depth, and spacing), curing method, and weather-protection requirements
- All finishing tools, curing materials, barricades, and lighting staged before Project 16 concrete discharge began
- A functioning power float/trowel machine and concrete saw, if required by the specification, inspected and fueled or charged before placement began
- A continuous finishing crew present for the full duration of placement through curing start; work may not pause at the end of Project 16
Common Field Fundamentals
Every finishing operation in this project follows the same discipline: evaluate the concrete's actual condition, perform the operation only when that condition is met, protect embedded items and joints throughout, and record the timing and result before moving to the next operation. This discipline connects directly to the continuous-placement requirement carried over from Project 16 and applies again in the Chapter 20 capstone, where the same slab is inspected one final time before handoff.
Bull-float / darbyCloses the screeded surface and removes ridges while workable
Edge and jointForms the perimeter radius and installs joints at the planned locations
Float and trowelSequenced passes bring the surface to the specified texture
Cure and protectCuring begins the moment the surface condition permits it
Reading Concrete Condition
Evaluate the concrete's condition before every operation in this project rather than relying on elapsed time since placement. Ambient temperature, humidity, wind, sun exposure, mixture, and slab thickness all change how quickly concrete becomes ready for each finishing step. A thumbprint or firm foot-pressure test on an inconspicuous area of the slab is the required method for judging readiness for edging, jointing, and troweling.
FN-097 – FN-102
Slab Finishing / Jointing Qualification
Float, Edge, Joint, and Finish a Concrete Slab
A. Finished-Project Specification
Deliverable: one completed Slab-Finish Inspection Record documenting the specified finish, edge profile, joint locations and method, curing method, weather controls, access restrictions, finishing times, joint installation, curing start time, defects identified and corrected, and protection measures in place when the crew left the site.
B. Assessed Finishing Schedule
| Operation | Readiness Condition | Standard | Purpose |
|---|---|---|---|
| Bull-floating / darbying | Surface workable, screed marks correctable | Approved direction and overlap; ridges, low areas, and aggregate exposure removed | Close the screeded surface |
| Edging | Bleed water and sheen dissipated to required condition | Specified radius and depth along perimeter and formed openings | Protect slab edges from chipping and provide a finished edge profile |
| Jointing (tooled or sawed) | Plastic condition for tooled joints; specified early-strength window for sawed joints | Planned location, timing, depth, and spacing per the approved joint plan | Control cracking at planned locations |
| Floating and troweling | Sequenced by concrete condition, not elapsed time | Meets the approved finish specification | Produce the required surface texture |
| Texturing | After final floating/troweling pass, before surface hardens | Specified direction and uniformity | Meet slip-resistance or appearance requirement |
| Curing start | Surface can receive the specified method without damage | Begun immediately when condition permits | Prevent rapid moisture loss and early-age damage |
C. Document and Tool Takeoff
- Controlling documents: approved surface-finish specification, edge-profile detail, joint plan, curing method, weather-protection requirements, and access restrictions, assembled before Project 16 placement begins.
- Finishing tools: bull float or darby, hand floats, power float/trowel machine where specified, steel trowels, edging tool, groover, straightedge, broom or texture tool, staged and inspected before placement begins.
- Jointing equipment: hand groover for tooled joints, or early-entry or conventional saw with the specified blade for sawed joints, fueled or charged and tested before placement begins.
- Curing and protection materials: curing compound, wet coverings, plastic sheeting, insulation blankets, and barricade materials, staged and ready before the surface reaches curing-start condition.
D. Acceptance Standards
| Check | Standard |
|---|---|
| Surface flatness | Ridges, low areas, birdbaths, and screed marks corrected during bull-floating and floating passes; matches the approved flatness or slope requirement |
| Edges | Specified radius and depth achieved continuously along the perimeter and every formed opening |
| Joints | Straight lines, consistent depth, correct intersection details, located, timed, and spaced per the approved joint plan |
| Surface finish | Matches the approved finish specification (float, trowel, broom, or other specified texture) in direction and uniformity |
| Slope and drainage | Matches the approved plan; verified while correction remains possible |
| Curing and protection | Begun at the correct surface condition; barricades in place against foot traffic, equipment, rain, freezing, rapid drying, contamination, and early loading |
| Finish defects | No uncorrected tearing, scaling, dusting, ridges, birdbaths, joint defects, or finish inconsistency; correctable conditions repaired, others documented for later evaluation |
E. Preparation — Confirming Specifications and Readiness
- Confirm the specified surface finish, edge profile, joint locations, joint method, flatness or slope requirements, curing method, weather controls, and access restrictions. Record each specification on the Slab-Finish Inspection Record before concrete discharge begins in Project 16.
- Evaluate the concrete condition before each finishing operation rather than working solely by elapsed time. Use a thumbprint or firm foot-pressure test on an inconspicuous area before every operation in this sequence.
F. Bull-Floating and Initial Surface Correction
- Bull-float or darby the screeded surface using the approved direction and overlap. Work in overlapping passes across the full slab area immediately after screeding is complete.
- Correct ridges, low areas, aggregate exposure, and screed marks while the surface remains workable. Stop and correct any area that will not close properly before moving to the next section.
- Avoid trapping bleed water, overworking the surface, or adding dry cement or unauthorized water. Do not continue floating an area that is still yielding visible water at the surface.
- Allow bleed water and sheen to dissipate to the required condition before later finishing. Check the surface at regular intervals using the thumbprint or foot-pressure test rather than a fixed wait time.
G. Edging and Jointing
- Edge the slab perimeter and formed openings using the specified radius and depth. Run the edging tool continuously along every perimeter form and opening before jointing begins.
- Tool construction, isolation, and contraction joints at the planned locations where the design uses tooled joints. Use the straightedge to guide the groover and match the joint plan exactly.
- Maintain straight joint lines, consistent depth, intersection details, and edge condition. Recheck each tooled joint against the straightedge before moving to the next.
H. Floating, Troweling, and Texturing
- Use hand floats, power floats, trowels, fresnos, brooms, texture tools, or other equipment only as required by the finish specification. Confirm the specified finish before selecting a tool sequence.
- Sequence floating and troweling passes according to the concrete condition and desired finish. Do not begin a troweling pass before the surface has reached the condition required for that pass.
- Apply broom or other texture in the specified direction and uniformity. Complete texturing immediately after the final floating or troweling pass and before the surface hardens further.
- Protect drains, depressions, edges, penetrations, and embedded items during finishing. Work around each protected feature without displacing it or filling it with finishing residue.
I. Verification Before Sawing or Curing
- Check slope, drainage, surface plane, edge condition, joint location, texture, and transitions while correction remains possible. Complete this check before the surface hardens past the point of correction.
- Saw-cut control joints at the specified timing, depth, spacing, and sequence where the design uses sawed joints. Begin saw-cutting only within the specified early-strength window; do not delay past the window or cut before it.
J. Curing, Protection, and Cleanup
- Begin curing immediately when the surface can receive the specified method without damage. Do not delay curing start once the surface condition permits it.
- Install wet coverings, curing compound, plastic, insulation, weather protection, or other specified controls. Apply the specified method continuously across the full slab area.
- Barricade the slab against foot traffic, equipment, rain, freezing, rapid drying, contamination, and early loading. Post barricades before leaving the area unattended.
- Inspect for tearing, scaling, dusting, ridges, birdbaths, joint defects, and finish inconsistency. Walk the full slab and formed openings and record every observed condition.
- Correct only conditions that can be repaired without causing greater damage; document defects requiring later evaluation. Refer any condition beyond minor correction to Project 18 or to qualified review.
- Clean tools and equipment using an approved washout method. Prevent cement residue from entering soil, drains, or waterways.
- Record finishing times, operations, weather, joint installation, curing start, defects, and protection measures. Complete every field on the Slab-Finish Inspection Record.
- Complete the slab-finish inspection and continued-curing handoff. Sign and date the release section of the record before leaving the site.
Common Finish Inspection
Inspect every finishing item using the same checks regardless of which operation produced it.
- Flatness check: confirm ridges, low areas, birdbaths, and screed marks were corrected while the surface was workable.
- Edge check: confirm the specified radius and depth are continuous along the perimeter and every formed opening.
- Joint check: confirm every joint is straight, consistent in depth, correctly intersected, and matches the planned location, timing, and spacing.
- Finish check: confirm the surface texture matches the approved finish specification in direction and uniformity.
- Protection check: confirm curing began at the correct surface condition and that barricades, coverings, and weather protection remain in place and continuous.
Complete the Slab-Finish Inspection Record in the Inspection Checklist section below before turning the work over for continued curing.
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Failure Points and Troubleshooting
Cleanup
This project ends with a finished, jointed, cured, and barricaded slab, not a cleared job site.
- Clean bull floats, hand floats, trowels, edging tools, groovers, and power-float equipment before concrete residue hardens on them
- Wash out saw-cutting equipment and dispose of slurry using an approved washout method that does not discharge cement residue into soil, drains, or waterways
- Confirm curing coverings, compound, or insulation are continuous across the full slab area before leaving the site
- Confirm barricades are posted and stable against foot traffic, equipment, rain, freezing, and early loading
- Return the Slab-Finish Inspection Record and photographs to the project record with the Project 16 placement log
Field Terms
- Bull Float
- A large flat tool used to close and level the screeded surface before hand finishing.
- Darby
- A hand-held straightedge tool used for initial surface leveling, typically on smaller slab areas.
- Bleed Water
- Water that rises to the concrete surface after placement and must dissipate before further finishing.
- Tooled Joint
- A control or isolation joint formed with a hand or walk-behind groover while the concrete is plastic.
- Sawed Joint
- A control joint cut into the slab surface with a saw within a specified early-strength window.
- Fresno
- A long-handled steel finishing trowel used for smooth or hard-troweled finishes.
- Curing Start
- The point at which the specified curing method may be applied without damaging the finished surface.
- Birdbath
- A shallow depression in a finished slab surface that collects standing water.
- Slab-Finish Inspection Record
- The document recording finishing times, operations, joint installation, curing start, defects, and protection measures.
- Continuous Operation
- The requirement that Project 16 placement and this project's finishing proceed without pausing at the chapter boundary.
Skill Check
- Why must concrete condition, rather than elapsed time, control the start of each finishing operation in this project?
- What is the risk of bull-floating or troweling an area of the slab while it is still yielding visible bleed water?
- Why must the finishing crew be staged and ready before concrete discharge begins in Project 16, rather than after screeding is complete?
- What is the difference between a tooled joint and a sawed joint, and what timing consideration applies to each?
- What is the required response when a defect is found that cannot be corrected without causing greater damage to the finished slab?
- Why must curing begin immediately once the surface reaches the correct condition, rather than after cleanup is complete?
- What safety precautions apply specifically to operating a power float/trowel machine?
- What are three possible causes of blisters or delamination appearing after finishing, and how does the learner confirm which one occurred?
- Why must drains, depressions, edges, penetrations, and embedded items be protected throughout every finishing pass?
- Why does this project's inspection explicitly separate correctable conditions from conditions requiring referral to Project 18 or qualified review?
Competency Rubric
| Competency | Independent Pass Standard | Not Demonstrated | With Assistance | Independently |
|---|---|---|---|---|
| FN-097 | Bull-floats or darbies the screeded surface using the approved direction and overlap, correcting ridges and low areas while the surface remains workable | |||
| FN-098 | Edges the slab perimeter and formed openings to the specified radius and depth continuously | |||
| FN-099 | Tools or saws control, construction, and isolation joints at the planned location, timing, depth, and spacing | |||
| FN-100 | Finishes the surface texture using the correct tool sequence to match the approved finish specification | |||
| FN-101 | Begins the specified curing method at the correct surface condition and barricades the slab against traffic, weather, and early loading | |||
| FN-102 | Inspects the finished slab for tearing, scaling, dusting, ridges, birdbaths, joint defects, and finish inconsistency, and documents the result |
Mark one column per competency. Only Demonstrated Independently awards the competency; Demonstrated with Assistance authorizes additional supervised practice but does not complete the requirement.
Inspection Checklist — Slab-Finish Inspection Record
| Item | Specification | Actual/Observed | Pass (Y/N) | Correction (if any) |
|---|---|---|---|---|
| Bull-float / darby completion time | ||||
| Edge profile (radius/depth) | ||||
| Joint method (tooled/sawed) | ||||
| Joint location/spacing/depth | ||||
| Saw-cutting window (if sawed) | ||||
| Surface finish/texture | ||||
| Slope/drainage | ||||
| Curing method | ||||
| Curing start time | ||||
| Barricade/protection in place | ||||
| Defects observed (tearing/scaling/dusting/birdbaths/joint defects) |
Weather during finishing: ____________ Defects requiring later evaluation: ____________
Slab-finish inspection declared complete: ______ (Pass/Fail) Date: ____________ Finisher name: ____________ Released by: ____________
Performance Check
With bull-floating, edging, jointing, floating, troweling, texturing, curing, and protection complete, review the finished record against the Acceptance Standards table and confirm the surface is free of uncorrected ridges, low areas, and screed marks; every edge and formed opening matches the specified radius and depth; every joint matches the planned location, timing, depth, and spacing; the surface texture matches the approved finish specification; slope and drainage match the approved plan; curing began at the correct surface condition; and barricades and protection are in place. Complete the Slab-Finish Inspection Record and refer any uncorrected defect for evaluation before turning the work over for continued curing. If an item fails, identify whether the error occurred in timing, tool selection, joint layout, or protection before recording the correction and re-running the affected check.
Project Closeout
You have completed the second half of the continuous slab operation begun in Project 16: floating, edging, jointing, texturing, curing, and protecting a residential concrete slab. This project required you to bull-float or darby the screeded surface (FN-097), edge the slab perimeter and formed openings (FN-098), cut or tool control joints at the planned locations (FN-099), finish the surface texture to the approved specification (FN-100), protect the slab surface by beginning curing at the correct condition (FN-101), and inspect the finished slab for defects (FN-102).
You now have a finished, jointed, cured, and protected slab with a completed Slab-Finish Inspection Record. That finished slab carries directly into the next project: evaluating and repairing any minor cracks, spalls, or localized surface defects that require attention as the concrete continues to cure.
Maintain curing and barricade protection exactly as recorded. Do not remove coverings, saw-cut protection, or barricades before the specified curing period is complete.