Tag Archives: drainage

Should I Close My Recreational Courts For The Winter?

One of the most frequently asked questions, especially in northern climates, is: Should I close my recreational courts for the winter?  Once cured, acrylic court surfaces are very durable and require little maintenance.  However, below are some items to consider.

Basketball Court Winterizing

Does ice and snow damage acrylic court surfaces?

Athletic courts, like tennis, pickleball, and basketball courts, should be built with a 1% slope to allow positive drainage without creating difficult playing conditions.  This helps the court surface to dry quicker, but also to prevent water damage to the acrylic surfaces.  Acrylic court surfaces do not like to be submerged in water for long periods of time.  However, as long as the coatings have time to dry, water doesn’t affect the longevity.  Since ice and snow is in a sold state, it would not soak into the surface and cause damage as quickly as puddled water may do.

Snow Management & Debris | Winter Court Maintenance

The biggest issue with keeping your court open in the winter is snow management.  There is no problem with playing on courts when it is cold outside.  However, if you have piles of snow on the surface, here are a few things to keep in mind:

  • Try to limit physical removal of snow and ice. (Metal shovels and tools with a sharp edge can damage the surface.  Try to stick with plastic shovels or wait for snow to melt before playing.
  • Using salt or other granule-type snow melt products can lead to extra abrasion to the surface.  When playing on the courts, any debris under foot can damage or shorten the life of the coatings.
  • Make sure to also remove any debris that has fallen, like leaves or pine needles.  Not only does this minimize abrasion but it also prevents other organic staining or damage from wet rotting leaves.

Court Accessories During The Winter

If you decide not to use your court during the winter, you may want to take down and store any windscreen that you are using.  This will help to prolong the life of windscreen.  If you decide to keep the tennis or pickleball nets up for winter play on nice days, you may want to reduce the tension on the net a bit.  Not enough to let it flap around in the wind, but a little tension relief can reduce extra strain on the net post footers and pavement during cold temperatures.  If you do decide to close your court for winter, remove the net and slide the tennis/pickleball posts out of the ground and cover the surface holes with a cap/plug.

Maintaining Positive Court Drainage

As previously mentioned, it’s very important for court surfaces to drain and not hold water.  During the winter, and really throughout the year, keep an eye on the court and make sure that nothing is stopping the flow of your court drainage design.

  • Make sure any drains around the court are not plugged with debris, like fallen leaves from the fall.  This will prevent back-up of water onto the court surface.
  • Keep vegetation trimmed around the edges of the court, especially on the low end of drainage.  Failing to do so can also create a dam for positive drainage.
  • The court should be built up a bit so that water can flow off the court to the drainage plan.  Make sure dirt or other obstructions are lower than the court surface edge, as well.

Winterizing Tennis Courts

Winterizing Your Tennis or Pickleball Court

Regardless of your decision to keep your court open for play during the winter, here are some court winterizing tips (recap):

  • Before the weather gets too cold, make sure to examine your court surface for cracks.  Fill the cracks with an acrylic crack filler to minimize the flow of water into the base of the court.  The less water that you have freezing and expanding under the base, the longer your court will stay in good condition.  Make sure to make these repairs far before the nighttime lows dip past 50 degrees F / 10 degrees C.
  • Walk the perimeter of the court and make sure there is nothing blocking drainage on any side of the slab.  Ensure that any visible drains are not blocked or plugged with debris.
  • Keep the surface free of debris, such as leaves, pine needles, and all other tree matter.
  • If you choose to close the court for winter, remove the net.  Optionally, if your posts are removeable, you can slide them out and store them.  If you do remove them, plug the surface holes with a cap (all post manufacturers make caps for the sleeves).  If you leave the posts and nets up, take a little tension off the net during the winter.
  • Avoid using sharp or potentially damaging tools on the surface for snow removal.  Salt and snow melting pellets may shorten the life of the surface, so use sparingly and make sure to blow or broom off excess particles to minimize damage.

What causes bubbles or blisters on a tennis court surface?

Bubbles and blisters on a tennis court surface, or other coated sport surface, are fairly common.  This is usually a result of improper tennis court construction or malfunction of the drainage system. When sub-surface water becomes excessive and is not properly drained away from the court, it can breathe through the slab in a vapor form and create hydrostatic pressure under the coatings.  This pressure builds more in weaker surface areas and creates a blister or bubble.  When the blister is raised, water vapor stretches the coating film and slowly breathes through to escape.  After most of the water pushes through, blisters usually lay back down and disappear until the next rain or precipitation event.  It’s important to note that excessive watering (sprinklers) around the court edge can also lead to blistering problems.  That being said, it’s very important to minimize accumulation of water beneath the court slab.

bubbles blisters pickleball court surface
Bubbles or Blisters on Court Surface

How Do I Get Rid of Bubbles and Blisters on a Tennis Court Surface?

In order to take care of the bubbles and blisters, long term, you will need to do some investigating.  Start by making sure any and all drains around the tennis court are free of debris or anything that would prevent proper flow of drainage water.  You may want to enlist the help of an architect or excavation professional in order to evaluate the current drainage system and see if it was installed properly, or at all.  If the court substrate is concrete, you must ensure the following:

  • Was a vapor barrier installed beneath the court when poured?
  • Are there perimeter drains that can take the water away from the court when it runs off after a rain? (Important that water is intercepted on all side of the slab, to prevent water beneath the court)
  • Was the concrete allowed to cure for 28 days, prior to coating?
  • Was the concrete surface acid etched to neutralize the alkalinity and balance the PH?
  • Were any curing compounds used on the concrete?
Court Surface Edge Drain
Surface-type drain – good for the low court edge

 

 

 

 

 

The American Sports Builders Association (ASBA) maintains construction guidelines for asphalt and concrete tennis court and sport surfaces.  Ensure that the construction of the court meets their guidelines and find out from the tennis court builder if they followed the ASBA recommendations.  This may help you figure out why the blisters are occurring.  If you are still not sure what to do, feel free to fill out the contact form on this page and we can put you in touch with a SportMaster recommended, tennis court builder.  They can perform a free site visit with you and provide feedback and estimates for repair, resurfacing, or re-construction. You can view our Engineering Specification for Athletic and Recreational Surfacing on our SportMaster site.

Tennis Court Blisters
Tennis Court Blisters