Should pavers be sealed before or after new landscaping?

A landscaping project that adds beds starts with the soil, not a plant, and that first step already touches the pavers nearby.

ICPI lists a source of efflorescence under the pavers, in the sand, base or soil and moving up through the joint sand or the pavers, as one of the conditions under which a sealer may whiten. A new bed dug along a paver edge and then watered in puts freshly moved, wet soil right beside that sand and base. That is a mechanism to weigh, not a finding: none of the documents quoted here measures what a new bed does to the pavers next to it. The other whitening conditions are set out in why sealed pavers turn white.

Once the beds are planted, the pavers next to them have new neighbors that a cleaning or a sealing has to work around.

ICPI's instruction covers both halves of the job: branches, shrubs and plants beside the pavement are tied back or covered so neither the cleaning solution nor the sealer drifts onto them. The makers say the same for their own products. Techniseal's Wet Look label says to cover vegetation, vehicles and adjacent surfaces that are not to be treated, and SEK-Surebond's SB-1300 sheet says to cover or protect nearby landscape from overspray during application.

Acidic cleaners are the other concern. ICPI warns that acidic cleaners may harm vegetation and grass and should not run onto it, and where a strong acidic cleaner might drain onto plants, the vegetation is saturated with water first, a pre-wetting step. The cleaning rules for each paver material are on the materials section of the paver cleaning page.

A landscaping job that adds beds can add or adjust sprinkler heads, and those get run and re-aimed before anyone calls the job finished.

ICPI is direct about what a sealing needs from that system: all automatic sprinkler systems are turned off during cleaning, sealing and drying. Techniseal's label for its NS Protector says the sprinkler system must be turned off, and SEK-Surebond's PolySweep sheet says to turn off irrigation systems when installing that polymeric sand. Heads still being run and re-aimed for coverage are not a system that is off, which is the condition those documents set. Whether irrigation that runs after dark matters is its own question, on sprinklers running at night around a sealing.

Whatever order the two projects run in, a sealer arrives with its own conditions and does not skip them for a newly landscaped yard.

ICPI warns that sediment or cleaner left standing in a low spot can stain pavers, and SEK-Surebond's site preparation bulletin says that if cleaning is skipped, dirt, spots and residue on the surface will be sealed in and look unsightly. Tech Spec 6 notes that rain on the pavement readily shows run-on from adjacent vegetated areas, so runoff from a new bed is something the next rain will reveal on the pavers beside it. Soil or grading that sends water onto the pavers is a question for the landscaper. What a sealer seals in when the surface was not cleaned first, landscaping debris included, is answered on sealing a driveway without cleaning it first.

ICPI's cleaning procedure also starts with inspecting the area for cracked or broken units, which are replaced. Equipment working close to a paver edge is one way a unit gets cracked, and the procedure calls for that inspection whether new beds went in or not.

None of the documents quoted here, ICPI's included, sequences a paver sealing against a landscaping project; the documents describe what each step must cover, turn off and keep dry, not which project goes first.

That leaves two people positioned to answer it: the landscaper, who knows when the soil will stop moving and the irrigation will stop being adjusted, and the sealer manufacturer, whose label sets the moisture and vegetation conditions the surface has to meet on the day. Furniture and other items already on the pavers raise a related logistics question of their own, covered on moving patio furniture for a paver sealing.