For weeds between pavers, first check where the plants are rooted, what debris has collected, whether joints are low, and whether growth follows an edge or water path. Choose control after those checks. ND Brick Pavers offers paver repair in Tacoma and the surrounding area; ask for a condition assessment before treating every weed patch as a re-sanding job.
This guide helps you choose the next investigation. It does not identify a plant or diagnose a base from a photograph. The useful result is a short explanation of what needs attention: incoming seed, surface buildup, joint condition, adjoining vegetation, or a water concern. More than one can apply to the same patio.
What should you record before removing the weeds?
Photograph the pattern before changing it. Include a view of the whole pavement, a close view of the plants, and the neighboring lawn or planting bed.
Mark the weed patches on a simple sketch. Add doors, garden borders, downspouts, irrigation and visible drains. Note whether the plants appeared after landscaping, cleaning or joint work. If the timing is uncertain, write that down rather than assigning a cause.
Keep the plant question separate from the pavement question. An Extension adviser can help with identification; a paving contractor can assess the joints, edges and surface condition. Ask each professional what additional information they need. You do not need to pull apart the installation to prepare for either conversation.
Before chemical control, read EPA's pesticide safety guidance. It favors nonchemical approaches to reduce risk and requires following product precautions and restrictions if a pesticide is used. In Tacoma, also review the City's washing-discharge guidance before planning a wash. Its requirements depend on the activity and site; the table is not blanket permission to send dirty water into a drain or garden.
Which weed pattern points to which question?
Use the pattern to select a check, not to declare a cause. The table below is an observation worksheet: each possible explanation needs confirmation at the property.
| What you see | Possible explanation to investigate | What to check next | Who can help |
|---|---|---|---|
| Scattered small plants where loose dirt collects | Arriving seed finding a place to establish | Debris source and condition beneath the loose material | Homeowner observation, then plant identification if needed |
| Growth concentrated in a layer of leaves, clippings or soil | Organic buildup above the intended joint surface | Whether the material is surface debris or part of the joint | Maintenance provider or paving contractor |
| Plants in visibly recessed or broken joints | Missing or deteriorated joint material | Installed joint system, movement and history of material loss | Paving contractor |
| A continuous strip beside a lawn or bed | Vegetation spreading from the perimeter, or soil spilling over it | Plant identity, visible connections and border condition | Plant adviser and paving contractor as needed |
| Growth in a shaded patch that stays wet | A maintenance concern combined with moisture or drainage questions | Water sources, drying pattern and surface levels | Paving contractor; drainage specialist if needed |
Avoid choosing one explanation for the whole property. A front path beside turf and a sheltered back patio may need different follow-up. Give each area its own entry, even if the plants look similar.
Are seeds arriving from above, or is a plant spreading from the edge?
Both routes deserve consideration. Do not assume that all weeds came through the base, or that every plant arrived as a windblown seed.
Unilock's paver maintenance guide describes windblown seeds lodging in unfilled joints and recommends removing debris before it becomes trapped. That establishes a possible surface route, not the history of your particular weed patch.
There is also a reason to inspect neighboring plants. University of California IPM's weed-identification guidance explains that many perennial weeds reproduce through creeping stems, underground stems called rhizomes, or other vegetative structures. A plant can therefore require a different control plan from a new seedling. This is biology guidance, not a recommendation to apply a lawn treatment to paving.
Look from the garden toward the pavement as well as across the joints. Photograph any visible connection without pulling on it. Ask the plant adviser whether the growth is a seedling or part of a spreading plant. Ask the paving contractor whether the border is intact. Those are separate questions; an intact edge does not identify the weed, and a weed identification does not establish an edge failure.
Is organic buildup different from a failed joint?
Yes. Record material sitting above a joint separately from missing or broken joint material. Do not decide that the joint has failed until its condition can be assessed.
UC IPM's landscape guidance describes weeds establishing in decomposed organic mulch and identifies windborne seeds as a management concern. Applied to a paved area, that supports checking accumulated organic material as a possible growing medium. It does not prove that every dirty joint needs replacement.
For loose surface debris, begin with collection using a method compatible with the paving and its care instructions. Keep the collected material out of the joints and drains. If distinguishing debris from joint fill would require digging, stop and ask the contractor to examine it.
Compare the exposed condition with photographs of a cleaner, unaffected part of the same installation. Ask whether the joint is complete, whether the visible material is appropriate, and what remains unknown. A useful assessment can recommend ordinary upkeep in one area and further investigation in another.
For the cleaning process itself, use our paver cleaning without damage guide. It owns method selection, test areas and washwater planning. The decision here is whether the weeds are associated with surface accumulation, a joint defect, or both.
When should low joints change the plan?
Low or deteriorated joints should trigger a joint assessment before you buy replacement material. Ask why material is missing and whether the units or edges have moved.
Unilock's maintenance guide distinguishes several joint-material choices and includes inspecting joints after cleaning. Use that distinction to request the installed product information. Do not select a new material solely because a bag advertises weed resistance.
Bring earlier maintenance invoices. Ask whether the proposal involves replenishing an appropriate existing material, removing an unsuitable material, or investigating a recurring loss. Have the contractor identify the area involved and the basis for the choice. A description such as “sand all gaps” leaves those decisions unresolved.
The polymeric sand guide covers that product category and its installation questions. It should not be read as a prescription for every pavement. Ask for the exact proposed product instructions and a site-specific explanation before authorizing joint work.
If a unit moves or the border appears displaced, flag it for paver repair assessment. Do not push it back, fill over it, or accept weed removal as evidence that the movement has been corrected.
What do shade and lingering water change?
They add observations to the assessment; they do not establish a failed base. Record where water appears and which parts remain damp after neighboring areas dry.
Keep moss and rooted weeds as separate entries in your notes. Oregon State University Extension identifies shade and moisture as conditions favoring moss. That does not mean every weed has the same requirements or should receive the same treatment.
Check whether the affected area is below irrigation, beside an overflowing bed, or along a visible runoff route. Observe from a safe location; do not alter drains or redirect a downspout as a diagnostic experiment. Ask the contractor whether further drainage assessment is needed and who should perform it.
Our moss on pavers guide covers the moss-specific decision. Use it when moss is the concern rather than borrowing its removal advice for an unidentified plant. If the proposal includes drainage work, ask what observations support that scope and which questions remain open.
What control plan fits after the source checks?
Choose a plan that names the plant problem and the pavement work separately. Small accessible weeds may warrant manual removal; recurring or unidentified growth needs identification and follow-up rather than automatic escalation.
The UC IPM bulletin on weeds in paver joints describes manual removal, but warns that plants can regrow if incompletely removed and that removal can disturb joint fill. If working a plant loose starts moving the joint material or a paver, stop and obtain advice. Keep the before-and-after record so the next visit can evaluate what changed.
For any proposed herbicide, ask to see the exact label before agreeing to the work. EPA's label-reading guide identifies directions for where and how a product may be used, precautions, and disposal information. Have the provider check the actual site, target plant, weather restrictions and access instructions against that label. A product name or a claim that something is natural is not a complete treatment plan.
Do not turn a weed visit into an automatic sealing appointment. Our paver sealing guide owns the separate coating decision. Ask what specific objective a proposed coating serves, and request its compatibility information rather than accepting “weed prevention” as the full scope.
Does permeable paving need a different decision?
Yes. Identify whether the installation is a designed permeable system before changing its joints. Do not authorize an ordinary sand refill while that is unknown.
FHWA's permeable interlocking concrete pavement brief describes joints filled with permeable aggregate so water can enter the pavement. Ask a contractor to preserve that specified system when planning weed removal or joint work. Plant control and drainage maintenance must be considered together.
For the wider system and local planning questions, read permeable pavers and Tacoma stormwater. Bring the installation's maintenance plan to the visit if you have it. If records are missing, make system identification part of the assessment rather than guessing from joint width.
How will you judge whether the next visit helped?
Compare the same marked areas after the agreed work and at the follow-up condition you selected. Record new seedlings, returning plants, accumulating debris and renewed joint loss as different observations.
Ask the provider to leave three things: the work area, what was done, and what should trigger another visit. A clean photograph records appearance on that day. Your follow-up notes should show whether the original pattern returned and whether the suspected contributing condition was addressed.
ND Brick Pavers serves Tacoma and surrounding communities from its office in Yelm. Request a free on-site quote for paving repair concerns with your photographs, joint history and water observations. Ask for a scope that distinguishes maintenance from repair before deciding which work to authorize.
Frequently Asked Questions
Do I need to lift a paver to identify the weeds?
Start with photographs of the whole area, the plant and the adjoining garden or lawn. Ask an Extension adviser what identification details they need. Leave lifting and investigation beneath the paving to the contractor if an assessment calls for it.
Do weeds prove that the installer left out landscape fabric?
Do not infer the hidden construction from weeds alone. Ask for installation records and a condition assessment before proposing excavation. Have the contractor explain what evidence would justify opening the pavement and what decision that investigation would resolve.
What if the plant in the joint is a garden plant I want to keep nearby?
Identify the plant and show the adviser which planting should remain. Ask for a plan that separates the paving from the desired garden plants. Do not authorize a broad treatment under a description such as remove all greenery.
Should a weed-control invoice promise permanently weed-free paving?
Ask for a defined present scope and follow-up instructions instead. The invoice should identify the treated area, any separate joint or edge work, and what the provider will check if growth returns. Keep a permanent-result claim separate from the work you can inspect.