Your paver patio survived another Minnesota winter. Now is the time to give it the maintenance that keeps it looking sharp through summer entertaining season and prevents small problems from becoming expensive repairs. Late May is the ideal window for patio maintenance because the frost is fully out of the ground, spring rains have washed away loose debris, and you have the entire summer ahead to enjoy the results.
This guide covers the maintenance tasks that every Lake Minnetonka homeowner should do each spring, plus the warning signs that indicate your patio needs professional attention. Most of these tasks take a weekend afternoon. The ones that require professional help are noted clearly.
Step 1: Inspect for Winter Damage
Before you clean anything, walk your entire patio and look for damage caused by freeze-thaw cycling, ice melt chemicals, and snow removal. Minnesota's 60-plus freeze-thaw cycles per winter are the primary enemy of every hardscape surface, and catching problems early prevents them from worsening.
What to Look For
Shifted pavers. Individual pavers that have lifted, tilted, or sunk create trip hazards and allow water infiltration into the base. Minor shifting of 2 to 3 pavers can be fixed by lifting them, re-leveling the bedding sand, and resetting. Widespread shifting across a larger area suggests base failure that needs professional diagnosis.
Joint sand loss. Polymeric sand between pavers breaks down over time, especially after winter. If you can see gaps between pavers where sand has washed out or eroded, that is your top maintenance priority. Empty joints allow weed growth, ant colonization, and water infiltration that accelerates base erosion.
Efflorescence. White, chalky deposits on paver surfaces are calcium carbonate leaching from the concrete. This is cosmetic, not structural, and is most common on new patios during their first 1 to 3 years. It fades naturally with weathering and can be accelerated with an efflorescence cleaner.
Cracked or spalled pavers. Salt exposure from de-icing chemicals is the primary cause of paver surface damage. If you used rock salt or calcium chloride on your patio this winter, check for surface flaking and pitting. Damaged pavers should be replaced before they break apart further.
Step 2: Deep Clean the Surface
Once the inspection is done, clean the entire patio surface. The method depends on how dirty the surface is and whether your pavers are sealed.
For Routine Annual Cleaning
A garden hose with a fan-tip nozzle and a stiff bristle broom handle most annual cleanings. Wet the surface, apply a paver-specific cleaner (not bleach, which can discolor pavers and kill adjacent plantings), scrub with the broom, and rinse thoroughly. This removes surface dirt, pollen, and light organic staining.
For Heavy Staining or Algae
Patios in shaded areas — common on wooded properties in Shorewood, Deephaven, and Excelsior — develop algae and moss growth that simple scrubbing cannot remove. A pressure washer at moderate pressure (1,500 to 2,000 PSI maximum) with a wide fan tip cleans effectively without damaging the paver surface. Keep the nozzle at least 12 inches from the surface and work in overlapping passes.
Important: pressure washing will displace polymeric joint sand. Plan to re-sand joints after any pressure washing. This is not wasted effort — it is actually the most efficient workflow: clean the pavers thoroughly, let them dry completely, then apply fresh joint sand to a clean surface where it bonds properly.
Specific Stain Removal
Grill grease. Apply dish soap directly to the stain, scrub with a stiff brush, and rinse. For stubborn grease, an automotive degreaser works but test on an inconspicuous area first.
Leaf tannin stains. Orange or brown stains from wet leaves respond to oxygen-based cleaners (OxiClean or similar). Soak, wait 15 minutes, scrub, rinse.
Rust stains. Rust from metal furniture legs is the most stubborn patio stain. A commercial rust remover formulated for concrete or stone is the only reliable option. Prevent future rust stains by placing furniture glides or plastic caps on metal legs.
Step 3: Replenish Polymeric Joint Sand
Joint sand is the unsung hero of your paver patio. It locks pavers in place, prevents weed growth, resists ant intrusion, and channels water away from the base. When joint sand erodes — and it always does eventually — every other maintenance issue accelerates.
The Process
Wait for a dry forecast of at least 24 hours. Sweep polymeric sand across the dry patio surface, working it into joints with a broom. Use a leaf blower on low setting to clear excess sand from paver faces. Then mist the entire surface with a gentle spray (not a jet) to activate the polymer binding agents. The sand hardens into a firm, flexible joint within 24 hours.
Use sand specifically labeled as polymeric joint sand for pavers. Standard play sand, mason sand, and polymeric sand designed for wider joints (like retaining wall caps) will not perform correctly in the narrow paver joints. The investment in the right product — typically $25 to $40 per 50-pound bag — saves repeated applications of the wrong material.
Step 4: Address Weed and Ant Activity
If weeds are growing between your pavers, the joint sand has failed in those areas. Pull existing weeds by hand (pulling is more effective than spraying when the root system is accessible between joints), then fill the joints with fresh polymeric sand. The polymeric binding agent in quality joint sand inhibits future weed germination and creates a surface that ants cannot easily excavate.
For ant colonies that have established between pavers, clear the sand hill, pour boiling water into the joint to kill the colony, then resand. Chemical ant treatments are effective but can discolor pavers, so target the treatment into the joint rather than spraying broadly across the surface.
Step 5: Evaluate Your Drainage
During the next heavy rain, go outside and watch how water moves across your patio. It should flow in a defined direction — away from your house and toward lawn, beds, or a drainage collection point. If water pools on the surface, stands in low spots, or flows toward the foundation, you have a drainage issue that will worsen with every storm.
Minor pooling in a small area often indicates localized settling that can be corrected by lifting and releveling a section of pavers. Widespread pooling or drainage toward the house suggests a grading issue in the original installation or soil settlement that has changed the surface slope. This is professional territory — it requires removing a section of the patio, regrading the base, and reinstalling.
Step 6: Seal or Reseal (If Needed)
Not every patio needs sealing, and over-sealing is a common mistake. Quality pavers are manufactured with dense surface textures that resist staining and maintain color without sealer. Sealing adds a layer of protection against oil stains, makes the surface easier to clean, and can enhance color depth — but it also requires reapplication every 3 to 5 years and can create a slippery surface when wet if the wrong product is used.
If your patio was sealed and the seal has worn (water no longer beads on the surface), resealing in late May is ideal because the pavers are clean, dry, and warm. Use a breathable, water-based sealer designed for concrete pavers. Solvent-based sealers create a heavier film that can trap moisture and cause delamination in Minnesota's freeze-thaw conditions.
When to Call a Professional
Most of the maintenance described above is achievable for homeowners comfortable with a weekend project. Call for professional help when you see widespread paver settling (more than 10 square feet), base material visible between pavers, water pooling against the foundation, or pavers that have shifted enough to create noticeable trip hazards. These issues indicate base or drainage problems that surface-level fixes will not resolve.
We build and maintain paver patios across the Lake Minnetonka area. If your patio needs more than routine maintenance, contact us for an assessment. We will tell you honestly whether it is a simple fix or something that needs structural attention.
Frequently Asked Questions
How often should I clean my paver patio in Minnesota?
A thorough cleaning once per year in late May is sufficient for most Lake Minnetonka patios. Spot-clean spills, leaf stains, and grill grease as they happen throughout the season. Power washing should be limited to once per year at moderate pressure (under 2,000 PSI) to avoid damaging paver surfaces and displacing joint sand.
Do I need to reseal my paver patio every year?
No. Quality paver sealers last 3 to 5 years in Minnesota conditions. Over-sealing creates a thick, peeling film that looks worse than an unsealed surface. Reseal only when water stops beading on the surface, which typically happens at the 3 to 5 year mark depending on sun exposure and foot traffic.
Why is my paver patio sinking in some spots?
Paver settling is usually caused by base material washout from poor drainage, compaction failure in the original installation, or tree root growth beneath the patio. Minor settling can be corrected by lifting individual pavers, adding base material, re-compacting, and re-setting. Widespread settling may indicate a drainage issue that needs to be addressed before releveling.