Garage Paint Calculator Project Checklist

Introduction

Garage painting has two tracks — walls and floors — each with its own sequence. Work this checklist in order with quantities from the Garage Paint Calculator.

Material Inventory with Quantities

Buy everything before Day 1. Mid-project store runs with wet epoxy on the floor are the stuff of DIY horror stories. Quantities below are for a standard 2-car garage (~37 m² / 400 ft² floor, ~50 m² / 540 ft² walls) — scale with the Garage Paint Calculator.

Category	Item	Qty (2-car)	Notes
Walls	Satin acrylic wall paint	1 gal (3.8 L)	2 coats over ~50 m² / 540 ft²
	Primer (drywall or masonry)	1 gal (3.8 L)	Skip if walls previously painted + sound
	Ceiling flat white (optional)	1 gal (3.8 L)	High-ROI brightness upgrade
Floor coating	2-part epoxy kit (2-car)	1 kit	Rated ~46 m² / 500 ft² two-coat
	Extra flake bag	1 bag (4–5 lbs / ~2 kg)	For medium broadcast; kit flakes cover light only
	Clear topcoat (urethane)	1 gal (3.8 L)	Required over flake broadcast; optional otherwise
	Anti-slip additive	1 bag	Mix into topcoat if wet traction is a concern
Prep chemicals	Concrete degreaser	1–2 bottles	Buy 2 — parking spots drink it
	Etch solution or grinder rental	1 gal or 1-day rental	Grinder preferred on hard/previously coated concrete
	Concrete crack filler	2–3 tubes	Polyurethane or epoxy-based, not regular caulk
	Patching compound	1 tub	For spalls and pitting
Tools & supplies	9-in roller covers, 3/8-in nap	6–8	Epoxy ruins them — they’re disposable
	Roller frames + extension poles	2	One for walls, one for floor (don’t cross-contaminate)
	2–3 in angled brushes	3	Cut-in: walls, floor edges, pit
	Painter’s tape (1.5–2 in)	3 rolls	Floor-to-wall line, zone boundaries, masking
	Plastic sheeting	1 roll	Moisture test + masking the house door
	Spiked shoes	1 pair	Non-negotiable for flake broadcast
	Mixing buckets (5-gal) + paddle mixer	3 buckets	Double-bucket mixing method needs spares
	Nitrile gloves, P100 respirator, goggles	1 set each	Epoxy is a sensitizer — protect skin and lungs

Go / No-Go Decision Points

These gates determine whether you proceed, pause, or pivot. Check each before committing materials.

Gate	Test	Go	No-go → action
Moisture	Plastic-sheet test, 24 hrs	Dry sheet, no darkening	Wet/dark → fix drainage or switch to breathable coating; do not epoxy
Concrete soundness	Screwdriver scrape; tap for hollow spots	Hard surface, solid sound	Powdering/crumbling → densifier first; hollow/delaminated areas → patch or consult a pro
Contamination	Water-drop test after degreasing	Water soaks in within seconds, everywhere	Beading/oily film → degrease again; persistent → grind
Surface profile	Water-drop test after etch/grind	Uniform absorption	Patchy beading → re-etch or grind the resistant areas
Weather window	72-hr forecast: 10–30°C (50–85°F), <80% RH	Stable, in range	Out of range → reschedule; do not “hope” the weather holds
Slab temperature	Infrared thermometer on coating morning	10–30°C (50–85°F)	Cold slab → heat space 24–48 hrs and re-check; hot slab → coat early morning
Schedule	Garage empty 4–7 days; vehicles parked elsewhere	Confirmed	Can’t clear it → don’t start; half-garage method only as a planned approach
Kit freshness	Check date codes; inspect for crystallization	In date, components fluid	Expired or crystallized → replace the kit; never gamble chemistry

Planning

• ☐ Measure walls (minus openings) and floor; note surface conditions
• ☐ Run calculator; buy wall paint + epoxy kit + prep chemicals
• ☐ Choose floor system for your use (see material guide)
• ☐ Arrange 4–7 days of empty garage + alternative parking
• ☐ Check 72-hour weather window (10–30°C, <80% humidity)
• ☐ Test for lead if pre-1978

Planning sub-checklist: the week before

• ☐ Run the plastic-sheet moisture test (needs 24 undisturbed hours)
• ☐ Confirm kit date codes and storage condition
• ☐ Line up a helper for epoxy day (mixing + rolling rotation)
• ☐ Confirm grinder rental reservation if grinding (reserve 2 days ahead)
• ☐ Notify household: garage off-limits dates on the calendar
• ☐ Stage alternative parking (driveway, street, neighbor — confirmed, not assumed)

Wall Phase

• ☐ Clear walls; remove hooks, shelves, outlet covers
• ☐ Fill dings; sand patches
• ☐ Mask floor edges, ceiling line, door frames
• ☐ Prime bare spots (full prime if new drywall)
• ☐ Two topcoats, 4-hour recoat minimum
• ☐ Paint ceiling while at it (optional, high ROI)

Wall phase sub-checklist: quality gates

• ☐ After coat 1: check coverage in raking light — thin spots get flagged for coat 2, not touched up wet
• ☐ Between coats: 4-hour minimum recoat (check the can — some satins need 6)
• ☐ After coat 2: remove tape while the paint is slightly tacky for the cleanest line
• ☐ Reinstall outlet covers and hooks only after 24 hours

Floor Prep Phase

• ☐ Degrease twice, scrub parking spots aggressively
• ☐ Etch or grind; rinse thoroughly
• ☐ Let dry 24–48 hours
• ☐ Moisture test (plastic square, 24 hours) — must pass
• ☐ Fill cracks; let filler cure
• ☐ Final vacuum/tack of entire floor
• ☐ Mask walls at floor line

Floor prep sub-checklist: verification

• ☐ Water-drop test passes everywhere (no beading) — GO/NO-GO
• ☐ Floor fully dry: tape a plastic square for 2 hours — no condensation = dry enough to coat
• ☐ Crack filler cured hard (fingernail test — no dent)
• ☐ Dust check: wipe a dark cloth across the floor — it should come up nearly clean
• ☐ Masking complete: wall bases, door thresholds, drain grates, anything not being coated
• ☐ Exit path planned: you must leave without stepping on wet epoxy — walk it dry first

Epoxy Application Phase

• ☐ Stage all tools: rollers, brushes, spiked shoes, flakes, mixing buckets
• ☐ Mix first batch (20-minute supply)
• ☐ Cut in edges with brush
• ☐ Roll field in sections, wet edge
• ☐ Broadcast flakes into wet epoxy
• ☐ Mix and apply subsequent batches without delay
• ☐ Second coat per kit instructions (if applicable)
• ☐ Exit without walking on coated areas (plan your route!)

Application sub-checklist: batch discipline

• ☐ Confirm mix ratio (volume or weight per label) before opening anything
• ☐ Mechanical mix 2–3 min, scrape sides, double-bucket method
• ☐ Start a timer per batch — discard at pot-life limit even if material remains
• ☐ Helper mixes batch N+1 while you roll batch N — no gaps
• ☐ Flakes broadcast into wet epoxy only — if a section skins over, stop flaking it
• ☐ Spiked shoes on before entering the wet field — no exceptions
• ☐ Note the time the last section was coated — the re-coat window starts now

Cure Phase

• ☐ No foot traffic 24 hours
• ☐ Light use 48–72 hours
• ☐ Vehicles back at 72 hours minimum (7 days ideal)
• ☐ Maintain temperature/humidity through cure

Cure phase sub-checklist: monitoring

• ☐ 24 hrs: touch-test an inconspicuous corner — should be hard-dry, not tacky (tacky = cure problem; investigate before proceeding)
• ☐ 48 hrs: check for amine blush (waxy film) — wash off if present before any second coat
• ☐ 72 hrs: second coat / clear topcoat within the re-coat window, or confirm window timing
• ☐ If re-coat window missed: sand entire first coat (80–120 grit) before re-coating — GO/NO-GO
• ☐ Day 7: vehicles return — park on cardboard/plywood for the first week if cautious
• ☐ Keep the space ventilated but within temperature spec for the full 7 days

Post-Project

• ☐ Photograph the finished floor (documents condition for any future warranty discussion)
• ☐ Save leftover paint/epoxy touch-up quantities, labeled with date and color
• ☐ Save kit labels / technical data sheets (recoat specs live here)
• ☐ Dispose of waste properly: hardened liquids to solid waste, solvents to hazmat collection, epoxy rags cured flat outdoors first
• ☐ Calendar reminder: 6-month inspection (adhesion spot-check, tire-lane condition)
• ☐ Calendar reminder: maintenance clear coat at year 4–5 in high-traffic lanes

Related Guides

• Complete Guide — full walkthrough.
• Pro Tips — technique details.
• Common Mistakes — what this prevents.
• FAQ — quick answers.

Get Your Number

Walls then floors, prep then product — start with the Garage Paint Calculator.

Disclaimer: Adjust for your garage’s specific conditions.