Commercial Hardscape Coordination

Why hardscape and planting have to be sequenced

Most problems with combined hardscape and landscape projects are sequencing problems rather than quality problems. Both trades did good work in the wrong order.

Paving after planting means equipment across finished beds and compaction where roots were meant to spread. Planting after paving with no allowance for irrigation means sleeves have to be cut in later, or lines routed the long way round.

Grade is the item that catches people out. Finished paving levels determine where water goes, and planting areas have to sit below them so water runs off the hard surface into the soil rather than the other way.

Getting the sequence right costs nothing. Getting it wrong is expensive to correct and often just gets lived with.

1. Set finished grades for hard surfaces before anything else
2. Install irrigation sleeves under any future paving before it is laid
3. Complete subgrade and drainage work
4. Lay hardscape, with planting areas kept below the finished surface
5. Prepare planting soil, then install irrigation
6. Plant, then mulch to the correct level

The details that decide whether it lasts

A handful of details separate a hardscape and planting interface that stays looking right from one that degrades within two years.

Edge restraint is first. Without it, paving units migrate, gravel spreads, and mulch washes onto the surface. It is inexpensive and it is what holds the whole edge together.

Levels are second. Mulch above the level of adjacent paving washes out with every irrigation cycle and every rain. Beds should sit slightly below the hard surface.

Expansion and movement joints matter where concrete meets anything else, and root barriers matter where a tree is anywhere near a slab. Neither is visible after installation and both determine whether the surface cracks in five years.

Accessibility is not optional

On commercial property, any change to a walking surface has accessibility implications, and landscape work changes walking surfaces more often than people realise.

Slope, cross slope, surface stability, and clear width all have requirements. A path resurfaced in a decorative material that is not firm and stable, or a planting bed that narrows a route, can create a compliance problem out of what looked like a landscape improvement.

Overhanging planting is the version that catches properties out most often. A shrub growing into a walkway reduces clear width, and a branch below head height over a route is a hazard. Both are maintenance items that become compliance items.

This is worth raising at design rather than discovering during an inspection.