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COMMERCIAL COURT
SUB-BASE CONSTRUCTION

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WHAT'S UNDERNEATH A COMMERCIAL SPORT COURT?

To help you understand the commercial court building process, we’ve listed the work which must be done before your facility can enjoy a properly installed PowerGame™ sport court. By laying sound foundations, your court will benefit from better ball control, bounce and consistency.

CONCRETE, ASPHALT OR COMPACTED GROUND?

To answer the question efficiently, we’d have to say concrete, which can be laid with high accuracy flatness, providing a great base for PowerGame court tiles. This is not to say that asphalt and compacted ground cannot be used. With a little additional preparation either surface can be levelled by our expert commercial court installers to provide a perfect base for PowerGame.

CONCRETE SLAB SPECIFICATIONS FOR CONTRACTORS

The following concrete recommendations are for informational purposes only. Sport Court UK is not responsible for concrete design specifications unless we have been directly involved in this aspect of the court project. Specific requirements for concrete design and installation should be confirmed by a local engineer and/or qualified contractor.

  • Minimum thickness of 4″ concrete slab with a 6″x6″ turndown at the court perimeter. Continuous #5 rebar may be used at the perimeter where slab will abut walls or other pavements.
  • Reinforcement Options include: 6×6 W1.4xW1.4 Welded Wire Fabric placed at 1/3 the depth of the concrete or any rebar mesh (min. 2″ concrete cover is necessary when adding rebar mesh); #5 continuous rebar at the perimeter of slab.
  • Concrete contractors should aim to achieve a 3,000 PSI at 28 days
  • The Slab shall have a medium broom finish
  • Slope: 0.5% Min. / 1% Max or 1 inch in 16 feet, all in one plane.
  • 1/4″ tooled radius edge or chamfered edge
  • Flatness tolerance of ±1/8″ (3.2mm) in any 10′ (3m) radius of the court area. Floor Flatness and Floor Levelness (FF and FL) numbers are not recognised.  
  • High spots shall be ground level and low spots filled with concrete leveling compound.

JOINT SPACING

Slab Thickness (Inches)Max. Joint Spacing (Feet)
3.5″6′
4″10′
4.5″10′
5″12′
6″15′ 
  • Control joints may be either tooled in “wet” concrete or saw cut within 18 hours of placement
  • Expansion joints should be used to separate new concrete whenever it abuts new or existing concrete from curbs, walls or any other rigid pavements/structures
  • Expansion joints shall be filled with pre-moulded joint filler
  • All joints should be sealed with sealant resistant to both oil and fuel
  • Concrete slab may be crowned at the court centre line and sloping down at 0.5% towards the edge of the slab.

CONCRETE SLAB CONSTRUCTION

Here in the UK, due to such a wide variety of unpredictable weather conditions, Sport Court UK install sport court powergame tiles on concrete slabs or consistently flat garden slabbed areas and driveways to ensure long-term, trouble-free performance. In many cases sub-base preparation is minimal, but it is still important to consider the following issues.

A. SUB-BASE MATERIAL

If an existing subsurface does not exist, we typically recommend installing a concrete slab (Minimum 4-inch slab thickness) for most game courts due to its performance, durability and longevity. Each concrete slab should be laid upon 50mm (2-inches) of compacted scalpings. Scalpings are used as a fill or sub base, the material in scalping can vary area to area and by manufacturer.

B. SUB-BASE FLATNESS

A properly built concrete slab can last forever. To guarantee the performance benefits of Sport Court® Powergame it is critical to ensure your concrete slab meets the flatness tolerances set out below. Sport Court UK recommend a flatness tolerance of ±1/8″ (3.2mm) in any 10′ (3m) radius of the court area.

C. SUB-BASE FINISH

PowerGame tiles can be laid over structural cracks no wider than 1/2″. Sharp cracks should be faceted or rounded so that ball bounce is consistent and the tiles don’t catch when the floor expands and contracts.

D. SUB-BASE EXPANSION

Court tiles expand and contract slightly with temperature changes so we advise specifying a court that is 2″ to 3″ shorter in width and length than the base dimensions you have. We also recommend trimming the tiles at least 1/2″ from any obstructions like the basketball goal post, fencing posts, etc.

Compacted base

Using varieties of crushed stone and compacting every layer is a good choice to create a hard, level, permeable surface, but will require maintenance and is vulnerable to erosion.

Asphalt

This inexpensive option often deteriorates quickly, but is a good choice for existing game court owners. You can upgrade to a Sport Court® PowerGame surface without the cost of excavation or site prep, as we can repair the asphalt and cover it with our Sport Court® PowerGame surface.

Residential-Sport-Court-Design-Installation-4
Asphalt before resurfacing
Residential-Sport-Court-Design-Installation-3
Asphalt court resurfaces with Sport Court® PowerGame™ tiles

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