Polyurea garage floor coating cost is best judged by the work and materials included, not by a price per square metre alone. A low quote may cover only a basic coating on a sound, prepared slab, while another may include crack repairs, moisture checks, decorative flakes and a protective topcoat. Because concrete condition and product systems differ, there is no single rate that can reliably predict the cost of every garage. Ask for an itemised estimate based on your floor, then compare the preparation, coating layers, repairs and exclusions line by line. If you are getting quotes in New Zealand, confirm that each total is in NZD and whether GST is included.
A coating project is a system of materials and labour, not simply a container of product spread over concrete. The contractor may need to assess the slab, prepare its surface, repair defects and apply several compatible layers. The exact sequence depends on the products specified and the condition of the floor.
Preparation is often one of the most important parts of the estimate. Coatings need a suitable bond with the concrete, so a quote should say how the surface will be prepared and what happens if the slab has weak, contaminated or previously coated areas. Grinding is common, but the appropriate method depends on the existing surface and the proposed system.
The coating specification also matters. Ask whether the written scope includes a primer, base coat, decorative flakes, a clear or coloured topcoat, and any texture added for grip. Not every system uses the same layers, so the quote should identify the actual products or at least provide their technical information rather than relying on a general label such as “polyurea.”
A clean, sound slab may need less preparation than concrete with peeling paint, old sealer, oil contamination or crumbling patches. Where the existing finish is poorly bonded, it may need to be removed rather than coated over. Ask the contractor to identify the condition they observed and the preparation included in the price.
Cracks, pits and uneven areas can add labour and materials. Some small surface defects may be filled as part of standard preparation; larger or moving cracks may need a different repair approach, and repairs cannot necessarily prevent future movement. Find out which defects are included, how they will be treated and whether substantial repairs will be priced separately if discovered during preparation.
Moisture moving through concrete can affect whether a coating is suitable and how the slab should be treated. A visual inspection alone may not answer that question. If moisture is a concern, ask whether testing is proposed, what the result means for the selected system, and whether any mitigation is included in the estimate.
Do not assume a generic “moisture barrier” is part of the price. If a contractor recommends one, request the product and installation details, the conditions it is intended to address, and any effect on the warranty. A coating cannot correct every underlying issue with the concrete.
Two quotes may both use the word polyurea but specify different systems. The product name alone does not tell you the number of coats, the coating build, the decorative finish or the performance characteristics. Ask for product names and technical data sheets, then check that the proposed layers are designed to work together.
Decorative flakes can be applied in different ways, from a lighter scatter to a more complete broadcast. The amount, colour blend and finishing work affect the appearance and may affect the scope of labour. A topcoat can also be specified differently depending on the system and the intended use. Confirm what finish is included rather than relying on a sample that may not reflect the quoted specification.
Consider how you use the garage. A floor used for parking and ordinary storage may not need the same texture or chemical resistance as a workshop where spills are more likely. If grip, sunlight exposure near the open door, or resistance to particular substances matters, ask which product specification addresses it. Verify those claims in the product information rather than assuming every polyurea system performs alike.
The floor area is a major part of the calculation, but layout can affect labour too. Narrow edges, steps, a separate storage bay or an awkward threshold may require additional work. Access, the need to move stored items, and whether the whole slab can be prepared at once can also affect the installation plan.
Ask whether the quote is based on measured floor area or an estimate, and clarify which spaces are included. Some contractors may have a minimum charge for a small project, so check how the total is calculated rather than assuming that a smaller floor will cost proportionally less.
| Cost factor | What may add work | What to ask |
|---|---|---|
| Preparation | Old coatings, contamination, weak concrete or difficult edges | What preparation method and removal work are included? |
| Repairs | Cracks, pits, spalling or uneven areas | Which repairs are covered, and how are larger defects priced? |
| Moisture | Testing or a system change if the slab presents a concern | Is testing included, and what happens if results affect suitability? |
| Coating specification | Different layers, flake coverage, texture or finish | Which products and finish are named in the written scope? |
| Layout and access | Steps, separate areas, obstacles or restricted access | Has the contractor measured every area being coated? |
Request at least two itemised estimates if practical, using the same description of the floor and desired finish. A total that looks lower may exclude repairs or preparation that another contractor has included. Comparing the scope makes it easier to see whether the difference reflects a genuinely different system, an omitted task or simply a different way of presenting the price.
Ask each contractor to write down assumptions that could change the price. For example, an estimate may rely on the slab being sound or on the existing coating being removable without extra repair. Clear assumptions are more useful than a reassuring verbal promise because they show where the total could change once work begins.
A low estimate is not automatically poor value, and a high one is not automatically better. The useful question is whether each price covers the same preparation, repairs, materials and finish. If one contractor has included moisture assessment and repair allowances while another has not, their totals do not describe the same job.
When a quote is much lower than the others, ask for the missing detail before deciding. It may reflect a simpler finish or a smaller scope, but it could also leave removal, repairs or additional coating work outside the quoted total. Ask the contractor to confirm in writing what is excluded and how any extra work would be approved and charged.
A higher quote may make sense if it includes work your slab needs or a finish that suits how you use the space. It may not be worthwhile if the extra cost buys features you do not need. Request a revised option that separates essential preparation and coating from optional choices such as a different flake blend or added finish, if the contractor offers those choices.
Coating terminology can be confusing. Polyaspartic is a type of polyurea chemistry, and product names are sometimes used loosely in sales descriptions. Epoxy is a different coating chemistry. Those labels alone do not establish how a particular installed system will perform or what it should cost.
If you are comparing a polyurea estimate with an epoxy alternative, compare the complete written system: preparation, compatible primer or base, finish coats, decorative options, expected use conditions and warranty terms. Ask the installer to explain any claimed difference in cure or return-to-service time and to provide the product documentation. Avoid choosing solely on a broad statement that one chemistry is always tougher, cheaper or more durable.
Before requesting quotes, clear enough of the garage for contractors to inspect the slab. Point out known spills, previous coatings, recurring dampness, cracks and areas that sound or look different from the surrounding concrete. Share how you use the space, including whether vehicles, workshop equipment or stored chemicals will be present.
Provide the same information to every contractor. If you have measurements, give them as a starting point, but ask whether the contractor will confirm the area before finalising the price. Agree on who is responsible for moving items and whether the quote includes any work outside the floor itself. These details reduce the chance of comparing estimates built on different assumptions.
Some contractors may give a rate per square metre, while others provide a project total. Either way, confirm the measured area, included preparation and finish, and whether GST is included. A unit rate is not useful for comparison if the work covered by it differs.
Contractors may have assessed the concrete differently or specified different preparation, repairs, coating layers and finishes. They may also make different assumptions about access or existing coatings. Ask both to itemise the scope so you can identify the actual reason for the gap.
Some surface defects may be repaired before coating, but a coating should not be assumed to solve every crack or movement problem. Ask the contractor to identify the cracks, describe the proposed treatment and explain what is included in the estimate. Significant slab issues may require separate assessment or work.
That depends on the existing coating’s condition and whether the new system can bond to it. Peeling, contamination or incompatible material may require removal or other preparation. Have the contractor inspect it and state in writing how the old finish will be handled.
The wait depends on the specific products, installation conditions and the contractor’s instructions. Ask for separate guidance on walking on the floor and returning vehicles, and follow the written instructions for the system installed. Do not assume that a fast initial cure means the surface is ready for every type of use.
Read what the warranty covers, how long it applies, and which conditions or preparation requirements may limit coverage. Ask whether it applies to the coating material, installation, or both, and keep the product and project documents. A warranty is not a substitute for understanding the scope of the work.
To judge polyurea garage floor coating cost fairly, compare itemised estimates for the same measured area and finish. Give particular attention to surface preparation, concrete repairs, moisture-related work, named products and exclusions. The best-value quote is the one that clearly covers the work your garage needs, without charging for features you are unlikely to use.
