Build an Exposed Aggregate Walkway: Step-by-Step Guide

Unlike patios or driveways, an exposed aggregate walkway doesn't require extensive excavation or footings. Work at your own pace—complete sections over multiple weekends. Masonry dealers offer regional aggregates: pea gravel, river pebbles, granite chips, etc. Timing is critical: don't scrape until aggregate holds firm (typically 1½–6 hours). Test by kneeling on a board laid on the surface—if it leaves marks, wait longer. If aggregate dislodges during brushing, let concrete set more. Slow curing gives strength; wait a week before walking on it and dampen daily during cure.

What You Need

• 2×4s
• Sand
• Wire reinforcing mesh
• Wood sealer (optional)
• Concrete mix
• Aggregate
• Masonry tools
• Wire brush
• Goggles, gloves, protective clothing

Instructions

Step 1: Form and Pour. Excavate, build 2×4 forms, pour sand, lay wire mesh. If leaving forms as decorative dividers, apply sealer and cover with duct tape. Pour concrete with aggregate mixed in, a few frames at a time. Strike off concrete.

Step 2: Brush to Expose Aggregate. After concrete firms, scrape with brush/broom to expose aggregate. Spray water, brush again. Repeat until exposure is uniform and water runs clear.

Step 3: Use Acid if Needed. If a section hardens too fast, scrub with 1:10 muriatic acid solution. Wear protective gear. Rinse well once aggregate is exposed.

Step 4: Finish. After at least a week of curing, brush on waterproofing solution for a lacquer-like sheen and rain protection. Remove tape from decorative forms.