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Search this topicNo. Unilock’s edging guidance places the restraint on the prepared compacted base, with loose bedding material removed from underneath. A restraint sitting on loose sand can move instead of holding the edge firmly. The restraint must also suit the base: plastic edging that relies on spikes gripping aggregate with fines is not automatically appropriate for an open-graded stone base.
Use a complete, compatible installation system. Unilock’s open-graded approach pairs larger clean angular base stone with a specified smaller chip-stone bedding layer; it is different from a dense-graded base and sand bed. Random substitutions can change drainage or allow fine material to migrate. Confirm the aggregate sizes, separation requirements, and edging with the paver supplier for your site.
Remove the rails and fill their grooves with the same specified bedding material, carefully smoothing it to the surrounding surface. Avoid walking on the finished bed, which can create depressions that show up in the pavement. Place pavers from the already laid area as the system allows. Screeding establishes an even bedding layer; it does not repair an uneven or poorly compacted base.
It should be even underfoot but normally needs a planned fall so water drains away from the house instead of pooling. Unilock’s on-grade guide uses a slope around 1.5 to 2 percent, with the actual layout determined by the site. Check thresholds, drainage destinations, and local requirements before digging, and arrange utility locating. A string line and measured elevations help establish the intended grade.
Check whether your particular paver or slab permits plate compaction, then use the manufacturer’s approved equipment and protective pad or roller system. Clear grit and debris from the surface before compacting. Large or thin slabs may require a different method from smaller interlocking pavers. Follow the specified compaction and joint-filling sequence rather than assuming every paving product uses the same order.
Blot or absorb the spill promptly with a suitable granular absorbent instead of rubbing it across the surface. Remove the absorbent as directed, then use a cleaner approved for that stain and paving material. Test an inconspicuous area first and follow the cleaner’s instructions. Aggressive scrubbing of a fresh spill can drive it deeper or spread it to neighboring pavers.
Yes. Excessive force can erode the surface and expose aggregate, while careless washing can disturb joint material. Begin with the paver manufacturer’s cleaning method rather than the washer’s highest setting. Use compatible cleaners and equipment settings, test a small area, and inspect the joints afterward. A stronger jet is not necessarily a better way to remove a stubborn stain.
Some products do. Techniseal’s SMARTSAND instructions explain that its joints can soften when wet and become firm again as they dry. That alone does not prove installation failure. Check your exact product’s behavior and whether the paving bed drains properly. Joints that remain persistently wet, wash away, or never set need investigation rather than repeated watering.
Do not dilute the product unless its manufacturer expressly specifies that mixture. Techniseal prohibits mixing SMARTSAND with other sand, cement, or other materials because the supplied formulation is designed to work as packaged. Choose a suitable jointing product and calculate the required quantity instead. A cheaper mixture may fail to perform as the original product is intended.
Check the product instructions, but dry-application products such as Techniseal RG+ require dry surfaces and joints. Moisture can activate the binder before the sand reaches its proper position, leaving poor filling or residue on the pavers. Wait for suitable weather and genuinely dry conditions; an apparently dry top surface does not establish that the joints below are dry.
No. Apply water using the exact jointing product’s activation procedure, working in the specified sections and checking that water reaches the required depth. Techniseal’s RG+ directions caution against flooding and runoff. Too little water can leave binder unactivated, while excessive water can move material. Hardening is a curing process, not something achieved by endlessly increasing the hose flow.
First identify the residue: polymeric binder haze and natural mineral deposits are not the same problem. Ask the paving and joint-sand manufacturers for a compatible cleaner and test it discreetly. Follow its dilution, surface preparation, and waiting period for new joints. For example, Techniseal’s Paver Restorer instructions require a waiting period after new polymeric joints; immediate acid washing can damage the installation.
A sealer can trap moisture or mineral deposits beneath the coating, producing an unwanted cloudy appearance. Clean the surface with compatible products and allow the pavers to dry to the sealer manufacturer’s requirements before application. Check the weather and nearby sprinklers as well. Do not add another coat over cloudiness without identifying its cause and consulting the coating supplier.
Only after confirming that the existing coating and new product are compatible. Identify the old sealer if possible, follow the new manufacturer’s preparation instructions, and test a small inconspicuous area. Different coating systems may require removal rather than direct recoating. Choose a product suitable for the paving material and intended finish; extra coats can change appearance and performance.
Not necessarily. Unilock describes sealing as an optional treatment that can change color or sheen and help resist staining, rather than a requirement for every paver’s durability. Check your product’s factory finish and care instructions first. Decide whether the appearance and maintenance commitment suit you, and use a compatible sealer if you choose to apply one.
It may be efflorescence, a mineral deposit that can appear as moisture moves through concrete. It does not automatically mean the pavers are defective, and it often diminishes with weathering. Confirm the cause before treating it, especially if the patio was recently sealed or jointed. Use only a manufacturer-approved removal method; ordinary dirt cleaners may not address mineral deposits.
Identify both the surface material and the likely stain before buying a cleaner. Oil, leaf marks, paint, and other residues can require different treatments. Check compatibility with the paver and any existing sealer, spot-test, and follow the label’s dwell and rinsing instructions. A general cleaner that removes ordinary dirt may not remove a deeply absorbed oil stain.
Keep a small labeled supply if you have space. Matching units make it easier to replace a cracked or permanently stained paver later, especially if a color or size is discontinued. Store them where they will remain sound and accessible. Save the product name and purchase details too, since appearance alone may not identify the exact replacement.
Read the cleaner’s plant-protection and runoff instructions before starting. Shield landscaping from spray where directed, test the cleaner on a discreet paving area, and avoid letting chemical runoff collect around plants. Different cleaners need different precautions, so do not assume a product is harmless because it is sold for outdoor use. Follow the specified rinsing procedure rather than improvising a mixture.
A plastic blade is generally less likely to scratch decorative pavers than scraping with a sharp metal edge. Push or lift snow carefully and avoid chopping bonded ice directly against the surface. Check the paver manufacturer’s winter-care advice before using deicers, since approved chemicals vary. Surface texture and joint condition also affect how easily a shovel moves across the patio.
Clear leaves, needles, and other debris that can stain when left wet on the surface. Check whether downspouts or other runoff concentrate water onto the paving where it may freeze. Correct drainage appropriately rather than simply spreading more deicer. Inspect the surface and joints for maintenance needs, and follow the paving manufacturer’s winter-care guidance for your particular product.
They serve different jobs. The specified bedding layer supports and levels the pavers over the prepared base; jointing material fills the spaces between units. Polymeric jointing products contain binders and are installed and activated according to their own instructions. Do not assume a bag labeled for joints is suitable underneath the patio, or that loose bedding sand meets every joint specification.
No. A blower disperses fine construction dust instead of capturing it, exposing people and contaminating nearby areas. STIHL specifically excludes plaster, cement, concrete, and similar dusty material from ordinary blower cleanup. Use a collection method suited to the material and its hazards, such as appropriately rated dust extraction, rather than treating a renovation site like a pile of leaves.
No. Operating a blower from a ladder, roof, tree, or other unstable position adds a serious fall risk. Use only a manufacturer-approved reach attachment from stable ground and follow its instructions, or choose professional gutter cleaning. Keep proper eye and hearing protection on; a longer tube does not make an unsafe standing position acceptable.
Source checks for these answers: September 22, 2026. Product instructions and local requirements can vary.