Water Slide Insulation

5 January, 2025

‘The benefits of effective insulation? Energy savings, cost savings, comfort for guests, and sustainability’

Image: Avasto Recreatietechniek

Water slide insulation is currently a hot topic (no pun intended). I receive many questions about it, so here is an attempt to provide some more information.

What are the benefits of effective insulation?

  • Energy efficiency: Reduces the need for additional heating systems, saving energy and costs.
  • Comfort: Maintains a consistent water and slide-surface temperature, improving user comfort.
  • Durability: Protects slide materials from temperature-related wear.

What methods are used?

Insulation materials

  • Foam insulation: closed-cell polyurethane foam is a common choice. It is lightweight, waterproof, and provides excellent thermal insulation. Applied as a layer under or around the water slide structure to minimize heat loss.
Foam insulation (VVP Composites)
  • Spray foam: this method involves spraying foam directly onto the surface. It expands and adheres to the structure, creating a seamless insulation layer. Ideal for irregular shapes and openings.
  • Thermal wraps: special thermal blankets or wraps can be applied to the outside of the slide to retain heat. Often used temporarily during colder months.
Thermal wraps (Image: Buitink Technology)

Structural design for insulation

  • Double-walled slides: some water slides are manufactured with a double-walled construction, where insulation material (e.g., air or foam) is sandwiched between the layers. This method provides both thermal insulation and extra structural strength.
  • Integrated heating elements: heating coils or cables integrated into the slide structure can regulate temperature, reducing the need for external insulation.

Surface coatings

  • Thermal barrier coatings: these are special paints or coatings applied to the slide surface that reflect heat and maintain internal temperature.
    Useful for outdoor slides in warm or cold climates.
  • Sun-blocking coatings: for slides exposed to sunlight, these coatings prevent overheating by reflecting solar radiation.
Special heat-resistant coating in a hot climate (Image B&Eau)

Water temperature control

  • Preheated water: ensuring that the water circulating through the slide has an optimal temperature reduces the cooling effect on the slide itself.
  • Insulated water supply lines: using insulated pipes to feed water to the slide helps maintain water temperature.

Environmental barriers

  • Enclosures: enclosing the water slide within a structure (building, dome or greenhouse) reduces exposure to external temperature fluctuations and helps retain heat. However, this is more expensive because it takes up costly indoor space.
Enclosed double-walled slide feature (Image ProSlide)
  • Windbreaks: installing barriers to block wind can prevent rapid cooling of the slide surface and water.
  • Use of a ‘stop’ to close slide openings when the lanes are not in use.
Insulating enclosure (Image Aquarena)

Advanced technologies

  • Phase change materials (PCMs, Phase Changing Materials): these materials absorb, store, and release heat, helping to maintain temperature stability.
How PCMs work (Image: www.innovationintextiles.com)
  • Smart sensors: sensors monitor the temperature of the slide and water and activate heating systems when needed.