Map where water starts and where it goes
A paved area is part of a larger drainage picture. Rain falling directly on the surface is only one possible source. A roof outlet, an uphill garden, an adjoining driveway or an overflow from another area may also contribute. Before describing a problem as a puddle in the paving, mark each visible source on a simple sketch. Include the house outline, paved boundaries, downpipes and any accessible drainage grates. Photograph from a safe, dry position without entering flowing water or lifting covers.
Record the difference between something you observed and something you suspect. A note saying that water crossed the driveway during a particular shower is useful evidence. A note saying that an underground pipe must be blocked is a diagnosis that still needs checking. If the route disappears beneath the paving, show that as unknown. A contractor can then decide whether the next step is a level survey, drainage investigation or coordination with another trade.
The Australian Government's Your Home stormwater guide explains that managing runoff involves the wider site, including vegetation and infiltration options. It does not establish which solution suits your block. Use that principle to avoid treating a new grate as a complete design before its destination has been established.
Treat doorways and garage entries as fixed constraints
The finished surface is the top of the installed paver, not the top of the base or the loose bedding. That distinction matters beside a door because all the layers must fit beneath the intended finish. A drawing that shows only a surface arrow can conceal a conflict between the proposed paving and an existing threshold. Ask the contractor to identify the reference levels used in the quote and explain which adjoining features cannot simply be raised or lowered.
Include sliding door tracks, garage entries, air vents, wall openings and existing inspection points in the discussion. Do not cover a building detail because it interrupts a tidy line. Its purpose should be understood first. Where a paving proposal changes the relationship between external ground and the building, the relevant building professional should assess the junction. The paving contractor should not be expected to guess what is hidden within the wall.
A garage can create a second problem even when the doorway appears straightforward. A surface transition must accommodate the vehicle and the water route at the same time. Tell the contractor about low vehicles, tow bars and any history of scraping. This is information for a designed transition, not an invitation to alter the public crossover or test a hazardous slope.
Separate a surface fall from an underground outlet
A fall describes the way a surface changes level. An outlet describes where collected water leaves the system. Both need an answer. A channel beside a garage may intercept surface flow, but the channel still needs an appropriate connection, access for upkeep and a route that functions under the conditions considered by the designer. Ask who is responsible for confirming these details and whether the drainage work is included in the paving scope.
Similarly, a garden is not automatically an acceptable destination because it looks lower. The soil, planting, adjacent structures and behaviour during wet weather all matter. Do not assume that coastal sand visible at the surface proves the whole site will absorb whatever water arrives. A drainage professional may need further information before recommending infiltration. There is no universal solution that can be selected from a suburb name alone.
When comparing proposals, look for the missing noun after the phrase falls to. Falls to a channel is incomplete if the channel's discharge is unexplained. Falls to the garden needs a description of the receiving area and any assessment required. Clear language reveals an unfinished design early, before the paving pattern is laid out and changes become more disruptive.
Resolve competing levels in narrow passages
A side passage can be bounded by a house, fence, gate and existing rear patio. These boundaries may each suggest a different finished height. It is easy to draw arrows along a narrow strip and overlook a doorway halfway down it. Prepare a sequence of photographs along the route, with each door, downpipe and change in surface clearly labelled. Ask the surveyor or contractor to show how the proposed surface relates to each point.
The route also needs to remain usable. A design that sends water in the intended direction may still create an awkward transition for a bin or pram. Explain what actually moves through the passage and where the user turns. The side access planning guide covers these movement decisions in more detail. Drainage and access should be considered together rather than treated as separate finishing tasks.
Where existing levels cannot be reconciled within a simple paving job, the honest answer may be a revised route, a different drainage arrangement or a wider coordinated project. Ask for the unresolved constraint to be written down. A quote that acknowledges this uncertainty is more useful than one that assumes the problem will disappear during excavation.
Example: a driveway with a low garage and raised garden
Consider an illustrative property with a driveway meeting a low garage entry and a garden that has gradually built up along one side. The owner sees water near the garage and asks for the pavers to be raised. Raising that area without checking the doorway could reduce the separation at the entry and redirect water into another corner. The visible puddle identifies a symptom, but it does not decide the repair.
A useful brief would include the garage threshold, the garden edge, visible outlets and the point where the driveway meets the existing crossover. The contractor would first confirm levels and investigate the drainage route. One proposal might involve relaying a defined area and coordinating drainage work. Another might require a broader change to the driveway profile. The owner can compare the area disturbed, the interfaces affected and what each option actually resolves.
This is a planning example, not a Geraldton customer job or a recommended design. Its purpose is to show why the smallest wet patch is not necessarily the smallest sensible work area. The scope should explain where the new surface stops and how it joins the retained paving without leaving an unexplained ridge or hollow.
Ask for a drawing that explains the interfaces
A useful drawing need not be an elaborate presentation. It should identify the work boundary, fixed reference points, proposed surface directions, drainage components and connections to existing surfaces. Ask for each symbol to be explained. An arrow with no destination and a channel with no outlet remain unanswered questions even on a professional looking plan. Keep the drawing with the quote so both documents describe the same work.
Request a section at difficult junctions. A section is a view through the proposed construction, helping show how the surface and supporting layers fit against a doorway, edge or existing slab. It can expose a conflict that is difficult to see from above. The contractor should determine the construction dimensions from the selected system and site conditions; a generic internet diagram is not a substitute.
Also establish how concealed surprises will be handled. If excavation reveals an undocumented service or unsuitable ground, agree that affected work pauses while the revised detail is discussed. Record who can authorise a variation and what evidence accompanies it. This avoids an improvised alteration to the drainage route being accepted merely because the crew and materials are already on site.
Compare complete drainage scopes
Two paving quotes may name the same paver while describing very different projects. One may include a level survey, drainage investigation and making good around a new outlet. Another may allow only for lifting and relaying the surface. Neither comparison is meaningful until the exclusions are visible. Request separate descriptions for surface work, drainage work and reinstatement so an apparent saving can be understood.
Check responsibility for existing components. Is an old channel being retained, cleaned, inspected or replaced? Are its connections assumed serviceable? Who confirms that assumption? If a separate drainage contractor is involved, identify the handover between trades. Paving should not conceal unfinished work that another trade still needs to access. Sequencing matters as much as the final materials list.
For the paved area itself, ask how edge support and transitions are included in the finished scope. The existing driveway paving service page provides the broader service context. Use the drainage brief to make your enquiry specific: where water is observed, which fixed levels are involved, and which parts of the system remain unknown.
Agree what will be recorded at handover
Before work begins, agree what the handover record should contain. Useful items include the final work boundary, photographs of drainage connections before they are concealed, product details and any maintenance instructions for installed components. Ask for changes from the agreed drawing to be recorded. A future repairer should be able to understand the intended water route without relying on someone remembering the conversation.
Discuss how the contractor will verify the completed surface and drainage arrangement. The method should suit the project and be agreed by the responsible professional. A brief demonstration does not reproduce every possible storm, and a dry handover does not prove wet weather performance. Keep those limitations clear while still requiring the contractor to explain what was checked.
After completion, record any unexpected behaviour from a safe location and report it with photographs and dates. Do not lift grates, enter pits or attempt to alter pipework yourself. If the surface starts to move, refer to the existing paving movement guide for the related topic, while obtaining an assessment of the actual cause. Drainage planning is successful when the owner understands the intended route and knows who is responsible for assessing a departure from it.
Prepare your project brief
Collect the doorway, garage and outlet information before requesting a level assessment. Leave hidden connections marked as unknown.
Preparation progress appears here. Nothing is submitted.