Concrete Finishing: How to Finish Concrete in 7 Steps

How to finish concrete, in short: screed and bull float right after the pour, stop and wait until the surface sheen is gone, then edge, cut joints, hand float, and finish with a broom (outdoors) or steel trowel (indoors). Every step below has a timing cue—a look, a finger press, or a footprint—that tells you when to start it.

The Finishing Stages (In Order)

Concrete finishing follows a strict sequence:

The critical insight: You're not following a clock—you're following the concrete. Temperature, humidity, and wind all affect timing.

Stage 1: Screeding

Screeding levels concrete flush with your forms immediately after pouring.

Technique

1. Use a straight 2×4 (or metal screed) that spans both form edges
2. Rest board on forms with slight downward pressure
3. Pull toward you using a sawing motion (side to side as you pull)
4. Fill any low spots and re-screed
5. Work in sections if the slab is large

Tips

• Two people make screeding easier (one on each end)
• Keep the board wet to prevent sticking
• Don't push concrete forward—you'll create an uneven buildup
• Multiple passes are fine; perfection isn't required yet

Stage 2: Bull Floating

Bull floating closes the surface and brings cement paste (the "cream") to the top.

Technique

1. Extend bull float across the slab with handle
2. Push away from you with leading edge raised slightly (15°)
3. Pull back toward you with float flat
4. Overlap passes by half the float width
5. Work perpendicular to your screeding direction

Tips

• Keep movements smooth and consistent
• Don't press too hard—let the float ride the surface
• For large slabs, use a magnesium float (lighter, less sticky)
• Complete within 10-15 minutes of screeding

Stage 3: The Critical Wait

This is where most DIYers fail. After bull floating, water rises to the surface (bleed water). You must wait for it to disappear completely.

Signs Bleed Water Is Gone

How Long?

For a full timing chart by temperature, see the concrete finishing timing guide.

What happens if you don't wait: Finishing over bleed water traps moisture below the surface. This creates a weak layer that scales, flakes, and dusts within months.

Stage 4: Edging

Edging creates rounded edges that resist chipping and damage.

Technique

1. Run edger along the form edge with slight pressure
2. Keep tool flat against the surface
3. Work in one direction, then smooth return passes
4. Create a consistent 1/4" to 1/2" radius

Tips

• Work back and forth until edge is smooth
• Clean tool frequently if concrete builds up
• Rounded edges are especially important for driveways (tire impact)

Stage 5: Jointing (Control Joints)

Control joints create weak points where concrete cracks predictably instead of randomly.

Technique

1. Mark joint locations (every 8-10 feet, or per plan)
2. Use a straightedge as a guide
3. Run groover along the guide with firm pressure
4. Depth should be 1/4 of slab thickness (1" for 4" slab)
5. Smooth edges after cutting

Joint Spacing Rules

Stage 6: Hand Floating

Hand floating further smooths the surface and prepares for final finishing.

Timing Test

Press your finger into the surface. If it leaves a 1/4" impression without water coming up, it's time to float.

Technique

1. Work on kneeboards to distribute your weight
2. Move float in sweeping arcs
3. Keep float flat—don't dig in edges
4. Work backward toward your exit point

Stage 7: Final Finish

The final finish determines appearance and texture.

Broom Finish (Recommended for Beginners)

The easiest finish, providing good traction for outdoor surfaces.

Technique:

1. Wait until surface water has disappeared and concrete is firm
2. Drag a stiff-bristled broom across the surface
3. Pull in one direction (perpendicular to traffic)
4. Keep consistent pressure for even texture
5. Clean broom between passes if buildup occurs

Best for: Driveways, sidewalks, patios, pool decks—anywhere slip resistance matters.

Trowel Finish (Smooth)

Creates a dense, smooth surface. More difficult to master.

Technique:

1. Wait longer than for broom finish (surface should be quite firm)
2. Use steel trowel with blade flat to surface
3. Work in overlapping arcs
4. Multiple passes, increasing pressure slightly each time
5. Final pass should "ring" as steel glides over hardened surface

Best for: Garage floors, interior slabs, surfaces that will be covered.

Warning: Smooth finishes can be slippery when wet—not ideal for exterior use.

Decorative Finishes

Stamped, exposed aggregate, and other decorative finishes require specialized timing and techniques. See our stamped concrete guide for more on decorative options.

Concrete Finishing Techniques Compared

The final-finish stage is where you choose a technique. Five techniques cover nearly all residential flatwork:

For step-by-step instructions on each one, see concrete finishing techniques compared.

Concrete Finishing Tips

These are the habits that separate a clean pro finish from a DIY slab that dusts or crazes in its first winter:

1. Order a mix you won't need to water down. A 4–5 inch slump is workable for flatwork. Adding water at the truck or sprinkling it on the surface weakens the top layer.
2. Never "dust" the surface with dry cement to soak up bleed water. It creates a thin, paste-rich skin that crazes and flakes.
3. Check the weather, not just the forecast high. ACI 305R treats an evaporation rate above 0.2 lb/ft²/hr (hot, dry, windy) as the threshold where the surface dries faster than it bleeds. Plan windbreaks, shade, or an evaporation retarder for those days.
4. Use a magnesium or wood float on air-entrained concrete. Exterior mixes are usually air-entrained for freeze-thaw resistance; hard steel-troweling them can seal the surface and cause delamination.
5. Limit steel-trowel passes to about three. Each extra pass pulls more paste to the surface.
6. Work off kneeboards and finish toward your exit so you never step back onto finished concrete.
7. Groove joints at 1/4 slab depth (1 inch in a 4-inch slab) and no more than 8–10 feet apart on a 4-inch slab, or saw-cut within 6–18 hours.
8. Start curing within 30 minutes of the last pass. Spray an ASTM C309 curing compound or cover with plastic and keep the surface moist for at least 7 days.

Common Finishing Mistakes

Finishing Too Early

Problem: Working over bleed water traps moisture, creating a weak surface layer.

Fix: Wait until the surface is matte and footprints don't fill with water.

Finishing Too Late

Problem: Concrete becomes too hard to work. Tools leave marks but don't smooth.

Fix: Work faster, or accept the texture as-is. There's no going back.

Overworking the Surface

Problem: Excessive troweling brings too much paste to the surface, weakening it.

Fix: Limit trowel passes. Three passes is usually plenty.

Inconsistent Technique

Problem: Visible lines, waves, or uneven texture.

Fix: Maintain consistent pressure and overlap passes properly.

Fixing Finishing Problems

Key Takeaways

• Follow the sequence: Screed → Bull float → Wait → Edge → Joint → Float → Finish
• Wait for bleed water—this is the #1 mistake DIYers make
• Watch the concrete, not the clock—conditions vary
• Broom finish is easiest and best for exterior surfaces
• You can't undo finishing mistakes easily—get the timing right

After finishing, your concrete needs proper curing. See how long concrete takes to cure and consider sealing your concrete for long-term protection.