What a Padel Court Base Inspection Actually Finds
Updated: 9 hours ago
Most padel court suppliers in the UK offer a visit before installation, and several publish it as a free assessment with no obligation. It takes about an hour and covers access, dimensions and drainage. That visit is a site survey, and its job is to help someone quote.
A padel court base inspection is a different piece of work. Its job is to establish whether the base you already have can carry a court, and whether the installation date in your programme is real. The two get confused because they happen at the same point in the project. They answer completely different questions.
We install courts across the UK and Europe. One of the most common reasons we see an installation date move is not weather, transport or labour. It is a base that was signed off as ready but was not.
What the slab is actually being asked to do
A padel court is not placed on the ground. It is anchored to it. UK industry guidance puts the combined weight of glass and steel in a single court at around six tonnes, before wind loading on an enclosed structure is taken into account. That load has to go somewhere, and it goes into a reinforced concrete slab or a perimeter ring beam.
The ring beam is the structural interface between the ground and the enclosure. Everything above it depends on it being right.
Two things follow from that. The first is geometry. Flatness across the playing area is not a cosmetic matter: deviation shows up in ball rebound and in the alignment of the enclosure itself, which is why flatness tolerance is one of the first things a padel base is specified against. The second is the cost of putting things right. Errors at foundation level are expensive to correct once the enclosure is standing, and some of them cannot be resolved without dismantling it.
What a padel court base inspection looks at
An inspection is not a walk around the perimeter. It covers five areas, and each one can change the project.
Level and geometry across the whole area. Not spot checks in four corners. Deviation on a padel court is rarely uniform, and the places it matters most are usually not the places that look worst. What we are establishing is whether the variation across the full footprint sits inside a range that can be worked with, and if not, what it would take to bring it there.
The anchoring substrate. What is under the surface, not what the surface looks like. Base plates have to go into sound structural concrete of known depth. A surface that appears solid is not the same as a surface that will hold an anchor under wind load for fifteen years. Where the composition of a base cannot be confirmed, that is a finding in itself.
The structural interface. Ring beam position and geometry against the actual court footprint, expansion joint placement, and isolation between the slab and any surrounding structure. Indoors, this is also where vibration transfer gets decided. Get it wrong and impact energy travels into the building rather than staying in the court.
Water. Falls, permeability and where the water goes when it leaves the surface. This one almost never stops an installation. It is one of the main reasons a court ages faster than it should.
Environment and access. Corrosion exposure, clearance around the enclosure, and whether the site can physically receive a delivery and an installation crew on the day it is booked.
What stops an installation outright
Four findings mean the crew does not start. Each of them sits upstream of everything on our installation page.
A base outside the range that can be corrected on site. Levelling a slab is groundworks, not installation, and it is not something a crew resolves in an afternoon.
No confirmed structural concrete to anchor into. We are sometimes asked to fix into tarmac on the assumption that concrete sits somewhere beneath it. Our own standard here is fixed: an anchor whose substrate cannot be verified is not an anchor, and we do not certify one. This is a company position rather than a code requirement, and we state it in writing before a project starts.
A ring beam that does not match the footprint of the court being delivered. This is more common than it sounds, particularly where the beam was poured before the court model was finalised.
Concrete that has not cured to specification. The slab and the strip foundation are separate pours for a reason, and the sequence is not negotiable.
What does not stop installation but costs you later
These are the findings that make an inspection worth paying for, because none of them will announce themselves on installation day.
Marginal falls mean water sits on the surface instead of clearing it. Standing water accelerates turf wear, encourages moss and algae, and eventually works on the base itself.
Corrosion exposure is treated too casually on UK sites. The Lawn Tennis Association's Padel Court Construction Guidance Note, published in 2025, is direct about this: corrosion rates in the United Kingdom are considerably higher than in continental Europe, and it recommends galvanised steelwork with subsequent zinc electroplating for all metal in the court structure. A specification written for southern Europe and delivered unchanged to a site in Britain is a specification with a shortened life.
And there is a commercial finding that owners rarely see coming. The same LTA guidance note states that manufacturers' warranties typically cover the failure of individual components through wear and corrosion rather than structural failure of the perimeter enclosure. That matters because base movement does not break components. It twists the frame, and a twisted frame loads the edges of glass panels that were never designed to carry it. When that happens two or three seasons after opening, the cause sits in the ground and the cost sits with the owner.
A base inspection is the last point in the project where that outcome is cheap to prevent. Once it has happened, it becomes a restoration job, and restoration on a structural cause is not a panel swap.
Survey or inspection
A site survey tells a supplier what to quote. A padel court base inspection tells you whether the base you have will carry the court you are buying, what has to change before it will, and what the consequences are of proceeding anyway.
Across the courts in our project record, the sites where this distinction mattered most were conversions and fixed-date openings rather than new builds. If you are building from scratch with groundworks still ahead of you, a survey may be all you need. If you are anchoring to an existing slab, converting an indoor space, or working to a fixed opening date, the inspection is the one that protects the programme.
Frequently asked questions
Does a padel court need a concrete slab?
A padel court needs a structural base capable of taking anchor loads. In most UK installations that means a reinforced concrete slab or a reinforced concrete perimeter ring beam. The right option depends on ground conditions, drainage and whether the court is indoors or outdoors.
Can you install a padel court on tarmac?
Not as a structural anchoring substrate. Tarmac or asphalt is used in some builds as a permeable inner surface within a strip foundation, but the enclosure itself is anchored into structural concrete. Fixing base plates into tarmac in the hope of reaching concrete below is not a method we will certify.
What happens if the slab is not level?
It depends on how much and where. Small variation can sometimes be accommodated during installation. Beyond that the base has to be corrected before the enclosure goes up, because deviation carried into the structure affects ball rebound, panel alignment and the long-term loading on the glass.
How long does a base inspection take?
We schedule a half-day for a single court. Multi-court sites take longer, mainly because the relationship between courts introduces its own geometry.
We already had a site survey. Do we still need an inspection?
If the survey confirmed what is structurally beneath the surface, measured deviation across the full footprint and checked the ring beam against your court model, then you have most of what an inspection provides. If it established access, dimensions and a price, you have a quotation.
Where this comes from
The statements on corrosion protection and on the scope of manufacturers' warranties are taken from the Lawn Tennis Association's Padel Court Construction Guidance Note, 2025, and are linked above. The load figure is from published UK industry guidance. Everything else on this page is either our own working standard, stated as such, or an observation from courts we have installed. We have kept the three separate on purpose.
If you are working to a fixed opening date and anchoring to a base you did not pour yourself, we can inspect it before your installation window opens.
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